cmd/compile: use correct type for byteswaps on multi-byte stores

Use the type of the store for the byteswap, not the type of the
store's value argument.

Normally when we're storing a 16-bit value, the value being stored is
also typed as 16 bits. But sometimes it is typed as something smaller,
usually because it is the result of an upcast from a smaller value,
and that upcast needs no instructions.

If the type of the store's arg is thinner than the type being stored,
and the byteswap'd value uses that thinner type, and the byteswap'd
value needs to be spilled & restored, that spill/restore happens using
the thinner type, which causes us to lose some of the top bits of the
value.

Fixes #59367

Change-Id: If6ce1e8a76f18bf8e9d79871b6caa438bc3cce4d
Reviewed-on: https://go-review.googlesource.com/c/go/+/481395
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gopher Robot <gobot@golang.org>

diff --git a/src/cmd/compile/internal/ssa/_gen/AMD64.rules b/src/cmd/compile/internal/ssa/_gen/AMD64.rules
index 06e48a18589ccd698a2f29cc4d17ea9af359a0e6..d93811e9ff19bcd8a48763ae1c888e74cb8a3c43 100644 (file)
--- a/src/cmd/compile/internal/ssa/_gen/AMD64.rules
+++ b/src/cmd/compile/internal/ssa/_gen/AMD64.rules
@@ -1758,13 +1758,13 @@
   x0:(MOVBstore [i-1] {s} p (SHRWconst [8] w) mem))
   && x0.Uses == 1
   && clobber(x0)
-  => (MOVWstore [i-1] {s} p (ROLWconst <w.Type> [8] w) mem)
+  => (MOVWstore [i-1] {s} p (ROLWconst <typ.UInt16> [8] w) mem)
 (MOVBstore [i] {s} p1 w
   x0:(MOVBstore [i] {s} p0 (SHRWconst [8] w) mem))
   && x0.Uses == 1
   && sequentialAddresses(p0, p1, 1)
   && clobber(x0)
-  => (MOVWstore [i] {s} p0 (ROLWconst <w.Type> [8] w) mem)
+  => (MOVWstore [i] {s} p0 (ROLWconst <typ.UInt16> [8] w) mem)
 
 // Combine stores + shifts into bswap and larger (unaligned) stores
 (MOVBstore [i] {s} p w
@@ -1775,7 +1775,7 @@
   && x1.Uses == 1
   && x2.Uses == 1
   && clobber(x0, x1, x2)
-  => (MOVLstore [i-3] {s} p (BSWAPL <w.Type> w) mem)
+  => (MOVLstore [i-3] {s} p (BSWAPL <typ.UInt32> w) mem)
 (MOVBstore [i] {s} p3 w
   x2:(MOVBstore [i] {s} p2 (SHRLconst [8] w)
   x1:(MOVBstore [i] {s} p1 (SHRLconst [16] w)
@@ -1787,7 +1787,7 @@
   && sequentialAddresses(p1, p2, 1)
   && sequentialAddresses(p2, p3, 1)
   && clobber(x0, x1, x2)
-  => (MOVLstore [i] {s} p0 (BSWAPL <w.Type> w) mem)
+  => (MOVLstore [i] {s} p0 (BSWAPL <typ.UInt32> w) mem)
 
 (MOVBstore [i] {s} p w
   x6:(MOVBstore [i-1] {s} p (SHRQconst [8] w)
@@ -1805,7 +1805,7 @@
   && x5.Uses == 1
   && x6.Uses == 1
   && clobber(x0, x1, x2, x3, x4, x5, x6)
-  => (MOVQstore [i-7] {s} p (BSWAPQ <w.Type> w) mem)
+  => (MOVQstore [i-7] {s} p (BSWAPQ <typ.UInt64> w) mem)
 (MOVBstore [i] {s} p7 w
   x6:(MOVBstore [i] {s} p6 (SHRQconst [8] w)
   x5:(MOVBstore [i] {s} p5 (SHRQconst [16] w)
@@ -1829,7 +1829,7 @@
   && sequentialAddresses(p5, p6, 1)
   && sequentialAddresses(p6, p7, 1)
   && clobber(x0, x1, x2, x3, x4, x5, x6)
-  => (MOVQstore [i] {s} p0 (BSWAPQ <w.Type> w) mem)
+  => (MOVQstore [i] {s} p0 (BSWAPQ <typ.UInt64> w) mem)
 
 // Combine constant stores into larger (unaligned) stores.
 (MOVBstoreconst [c] {s} p1 x:(MOVBstoreconst [a] {s} p0 mem))

diff --git a/src/cmd/compile/internal/ssa/_gen/ARM64.rules b/src/cmd/compile/internal/ssa/_gen/ARM64.rules
index 78c24afaa8b46732d3898d338626875ef0e8c18c..3eb3c2e63b067bc4b5bdf621829409bbbe4c4244 100644 (file)
--- a/src/cmd/compile/internal/ssa/_gen/ARM64.rules
+++ b/src/cmd/compile/internal/ssa/_gen/ARM64.rules
@@ -2688,7 +2688,7 @@
        && x5.Uses == 1
        && x6.Uses == 1
        && clobber(x0, x1, x2, x3, x4, x5, x6)
-       => (MOVDstore [i-7] {s} ptr (REV <w.Type> w) mem)
+       => (MOVDstore [i-7] {s} ptr (REV <typ.UInt64> w) mem)
 (MOVBstore [7] {s} p w
        x0:(MOVBstore [6] {s} p (SRLconst [8]  w)
        x1:(MOVBstore [5] {s} p (SRLconst [16] w)
@@ -2708,7 +2708,7 @@
        && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1))
        && isSamePtr(p1, p)
        && clobber(x0, x1, x2, x3, x4, x5, x6)
-       => (MOVDstoreidx ptr0 idx0 (REV <w.Type> w) mem)
+       => (MOVDstoreidx ptr0 idx0 (REV <typ.UInt64> w) mem)
 (MOVBstore [i] {s} ptr w
        x0:(MOVBstore [i-1] {s} ptr (UBFX [armBFAuxInt(8,  24)] w)
        x1:(MOVBstore [i-2] {s} ptr (UBFX [armBFAuxInt(16, 16)] w)
@@ -2717,7 +2717,7 @@
        && x1.Uses == 1
        && x2.Uses == 1
        && clobber(x0, x1, x2)
-       => (MOVWstore [i-3] {s} ptr (REVW <w.Type> w) mem)
+       => (MOVWstore [i-3] {s} ptr (REVW <typ.UInt32> w) mem)
 (MOVBstore [3] {s} p w
        x0:(MOVBstore [2] {s} p (UBFX [armBFAuxInt(8, 24)] w)
        x1:(MOVBstore [1] {s} p1:(ADD ptr1 idx1) (UBFX [armBFAuxInt(16, 16)] w)
@@ -2729,7 +2729,7 @@
        && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1))
        && isSamePtr(p1, p)
        && clobber(x0, x1, x2)
-       => (MOVWstoreidx ptr0 idx0 (REVW <w.Type> w) mem)
+       => (MOVWstoreidx ptr0 idx0 (REVW <typ.UInt32> w) mem)
 (MOVBstoreidx ptr (ADDconst [3] idx) w
        x0:(MOVBstoreidx ptr (ADDconst [2] idx) (UBFX [armBFAuxInt(8,  24)] w)
        x1:(MOVBstoreidx ptr (ADDconst [1] idx) (UBFX [armBFAuxInt(16, 16)] w)
@@ -2738,7 +2738,7 @@
        && x1.Uses == 1
        && x2.Uses == 1
        && clobber(x0, x1, x2)
-       => (MOVWstoreidx ptr idx (REVW <w.Type> w) mem)
+       => (MOVWstoreidx ptr idx (REVW <typ.UInt32> w) mem)
 (MOVBstoreidx ptr idx w
        x0:(MOVBstoreidx ptr (ADDconst [1] idx) (UBFX [armBFAuxInt(8,  24)] w)
        x1:(MOVBstoreidx ptr (ADDconst [2] idx) (UBFX [armBFAuxInt(16, 16)] w)
@@ -2756,7 +2756,7 @@
        && x1.Uses == 1
        && x2.Uses == 1
        && clobber(x0, x1, x2)
-       => (MOVWstore [i-3] {s} ptr (REVW <w.Type> w) mem)
+       => (MOVWstore [i-3] {s} ptr (REVW <typ.UInt32> w) mem)
 (MOVBstore [3] {s} p w
        x0:(MOVBstore [2] {s} p (SRLconst [8] (MOVDreg w))
        x1:(MOVBstore [1] {s} p1:(ADD ptr1 idx1) (SRLconst [16] (MOVDreg w))
@@ -2768,7 +2768,7 @@
        && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1))
        && isSamePtr(p1, p)
        && clobber(x0, x1, x2)
-       => (MOVWstoreidx ptr0 idx0 (REVW <w.Type> w) mem)
+       => (MOVWstoreidx ptr0 idx0 (REVW <typ.UInt32> w) mem)
 (MOVBstore [i] {s} ptr w
        x0:(MOVBstore [i-1] {s} ptr (SRLconst [8]  w)
        x1:(MOVBstore [i-2] {s} ptr (SRLconst [16] w)
@@ -2777,7 +2777,7 @@
        && x1.Uses == 1
        && x2.Uses == 1
        && clobber(x0, x1, x2)
-       => (MOVWstore [i-3] {s} ptr (REVW <w.Type> w) mem)
+       => (MOVWstore [i-3] {s} ptr (REVW <typ.UInt32> w) mem)
 (MOVBstore [3] {s} p w
        x0:(MOVBstore [2] {s} p (SRLconst [8] w)
        x1:(MOVBstore [1] {s} p1:(ADD ptr1 idx1) (SRLconst [16] w)
@@ -2789,31 +2789,31 @@
        && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1))
        && isSamePtr(p1, p)
        && clobber(x0, x1, x2)
-       => (MOVWstoreidx ptr0 idx0 (REVW <w.Type> w) mem)
+       => (MOVWstoreidx ptr0 idx0 (REVW <typ.UInt32> w) mem)
 (MOVBstore [i] {s} ptr w x:(MOVBstore [i-1] {s} ptr (SRLconst [8] w) mem))
        && x.Uses == 1
        && clobber(x)
-       => (MOVHstore [i-1] {s} ptr (REV16W <w.Type> w) mem)
+       => (MOVHstore [i-1] {s} ptr (REV16W <typ.UInt16> w) mem)
 (MOVBstore [1] {s} (ADD ptr1 idx1) w x:(MOVBstoreidx ptr0 idx0 (SRLconst [8] w) mem))
        && x.Uses == 1
        && s == nil
        && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1))
        && clobber(x)
-       => (MOVHstoreidx ptr0 idx0 (REV16W <w.Type> w) mem)
+       => (MOVHstoreidx ptr0 idx0 (REV16W <typ.UInt16> w) mem)
 (MOVBstore [i] {s} ptr w x:(MOVBstore [i-1] {s} ptr (UBFX [armBFAuxInt(8, 8)] w) mem))
        && x.Uses == 1
        && clobber(x)
-       => (MOVHstore [i-1] {s} ptr (REV16W <w.Type> w) mem)
+       => (MOVHstore [i-1] {s} ptr (REV16W <typ.UInt16> w) mem)
 (MOVBstore [1] {s} (ADD ptr1 idx1) w x:(MOVBstoreidx ptr0 idx0 (UBFX [armBFAuxInt(8, 8)] w) mem))
        && x.Uses == 1
        && s == nil
        && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1))
        && clobber(x)
-       => (MOVHstoreidx ptr0 idx0 (REV16W <w.Type> w) mem)
+       => (MOVHstoreidx ptr0 idx0 (REV16W <typ.UInt16> w) mem)
 (MOVBstoreidx ptr (ADDconst [1] idx) w x:(MOVBstoreidx ptr idx (UBFX [armBFAuxInt(8, 8)] w) mem))
        && x.Uses == 1
        && clobber(x)
-       => (MOVHstoreidx ptr idx (REV16W <w.Type> w) mem)
+       => (MOVHstoreidx ptr idx (REV16W <typ.UInt16> w) mem)
 (MOVBstoreidx ptr idx w x:(MOVBstoreidx ptr (ADDconst [1] idx) (UBFX [armBFAuxInt(8, 8)] w) mem))
        && x.Uses == 1
        && clobber(x)
@@ -2821,23 +2821,23 @@
 (MOVBstore [i] {s} ptr w x:(MOVBstore [i-1] {s} ptr (SRLconst [8] (MOVDreg w)) mem))
        && x.Uses == 1
        && clobber(x)
-       => (MOVHstore [i-1] {s} ptr (REV16W <w.Type> w) mem)
+       => (MOVHstore [i-1] {s} ptr (REV16W <typ.UInt16> w) mem)
 (MOVBstore [1] {s} (ADD ptr1 idx1) w x:(MOVBstoreidx ptr0 idx0 (SRLconst [8] (MOVDreg w)) mem))
        && x.Uses == 1
        && s == nil
        && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1))
        && clobber(x)
-       => (MOVHstoreidx ptr0 idx0 (REV16W <w.Type> w) mem)
+       => (MOVHstoreidx ptr0 idx0 (REV16W <typ.UInt16> w) mem)
 (MOVBstore [i] {s} ptr w x:(MOVBstore [i-1] {s} ptr (UBFX [armBFAuxInt(8, 24)] w) mem))
        && x.Uses == 1
        && clobber(x)
-       => (MOVHstore [i-1] {s} ptr (REV16W <w.Type> w) mem)
+       => (MOVHstore [i-1] {s} ptr (REV16W <typ.UInt16> w) mem)
 (MOVBstore [1] {s} (ADD ptr1 idx1) w x:(MOVBstoreidx ptr0 idx0 (UBFX [armBFAuxInt(8, 24)] w) mem))
        && x.Uses == 1
        && s == nil
        && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1))
        && clobber(x)
-       => (MOVHstoreidx ptr0 idx0 (REV16W <w.Type> w) mem)
+       => (MOVHstoreidx ptr0 idx0 (REV16W <typ.UInt16> w) mem)
 
 // FP simplification
 (FNEGS  (FMULS  x y)) => (FNMULS x y)

diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64.go b/src/cmd/compile/internal/ssa/rewriteAMD64.go
index 41cf6b93525ce5673239b9082252725e707c7f2a..86b69b5905e57af55f55b40e7249294f16fc3350 100644 (file)
--- a/src/cmd/compile/internal/ssa/rewriteAMD64.go
+++ b/src/cmd/compile/internal/ssa/rewriteAMD64.go
@@ -10484,7 +10484,7 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} p w x0:(MOVBstore [i-1] {s} p (SHRWconst [8] w) mem))
        // cond: x0.Uses == 1 && clobber(x0)
-       // result: (MOVWstore [i-1] {s} p (ROLWconst <w.Type> [8] w) mem)
+       // result: (MOVWstore [i-1] {s} p (ROLWconst <typ.UInt16> [8] w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10505,7 +10505,7 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
                v.reset(OpAMD64MOVWstore)
                v.AuxInt = int32ToAuxInt(i - 1)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x0.Pos, OpAMD64ROLWconst, w.Type)
+               v0 := b.NewValue0(x0.Pos, OpAMD64ROLWconst, typ.UInt16)
                v0.AuxInt = int8ToAuxInt(8)
                v0.AddArg(w)
                v.AddArg3(p, v0, mem)
@@ -10513,7 +10513,7 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} p1 w x0:(MOVBstore [i] {s} p0 (SHRWconst [8] w) mem))
        // cond: x0.Uses == 1 && sequentialAddresses(p0, p1, 1) && clobber(x0)
-       // result: (MOVWstore [i] {s} p0 (ROLWconst <w.Type> [8] w) mem)
+       // result: (MOVWstore [i] {s} p0 (ROLWconst <typ.UInt16> [8] w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10532,7 +10532,7 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
                v.reset(OpAMD64MOVWstore)
                v.AuxInt = int32ToAuxInt(i)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x0.Pos, OpAMD64ROLWconst, w.Type)
+               v0 := b.NewValue0(x0.Pos, OpAMD64ROLWconst, typ.UInt16)
                v0.AuxInt = int8ToAuxInt(8)
                v0.AddArg(w)
                v.AddArg3(p0, v0, mem)
@@ -10540,7 +10540,7 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} p w x2:(MOVBstore [i-1] {s} p (SHRLconst [8] w) x1:(MOVBstore [i-2] {s} p (SHRLconst [16] w) x0:(MOVBstore [i-3] {s} p (SHRLconst [24] w) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && clobber(x0, x1, x2)
-       // result: (MOVLstore [i-3] {s} p (BSWAPL <w.Type> w) mem)
+       // result: (MOVLstore [i-3] {s} p (BSWAPL <typ.UInt32> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10585,14 +10585,14 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
                v.reset(OpAMD64MOVLstore)
                v.AuxInt = int32ToAuxInt(i - 3)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x0.Pos, OpAMD64BSWAPL, w.Type)
+               v0 := b.NewValue0(x0.Pos, OpAMD64BSWAPL, typ.UInt32)
                v0.AddArg(w)
                v.AddArg3(p, v0, mem)
                return true
        }
        // match: (MOVBstore [i] {s} p3 w x2:(MOVBstore [i] {s} p2 (SHRLconst [8] w) x1:(MOVBstore [i] {s} p1 (SHRLconst [16] w) x0:(MOVBstore [i] {s} p0 (SHRLconst [24] w) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && sequentialAddresses(p0, p1, 1) && sequentialAddresses(p1, p2, 1) && sequentialAddresses(p2, p3, 1) && clobber(x0, x1, x2)
-       // result: (MOVLstore [i] {s} p0 (BSWAPL <w.Type> w) mem)
+       // result: (MOVLstore [i] {s} p0 (BSWAPL <typ.UInt32> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10631,14 +10631,14 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
                v.reset(OpAMD64MOVLstore)
                v.AuxInt = int32ToAuxInt(i)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x0.Pos, OpAMD64BSWAPL, w.Type)
+               v0 := b.NewValue0(x0.Pos, OpAMD64BSWAPL, typ.UInt32)
                v0.AddArg(w)
                v.AddArg3(p0, v0, mem)
                return true
        }
        // match: (MOVBstore [i] {s} p w x6:(MOVBstore [i-1] {s} p (SHRQconst [8] w) x5:(MOVBstore [i-2] {s} p (SHRQconst [16] w) x4:(MOVBstore [i-3] {s} p (SHRQconst [24] w) x3:(MOVBstore [i-4] {s} p (SHRQconst [32] w) x2:(MOVBstore [i-5] {s} p (SHRQconst [40] w) x1:(MOVBstore [i-6] {s} p (SHRQconst [48] w) x0:(MOVBstore [i-7] {s} p (SHRQconst [56] w) mem))))))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && x3.Uses == 1 && x4.Uses == 1 && x5.Uses == 1 && x6.Uses == 1 && clobber(x0, x1, x2, x3, x4, x5, x6)
-       // result: (MOVQstore [i-7] {s} p (BSWAPQ <w.Type> w) mem)
+       // result: (MOVQstore [i-7] {s} p (BSWAPQ <typ.UInt64> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10731,14 +10731,14 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
                v.reset(OpAMD64MOVQstore)
                v.AuxInt = int32ToAuxInt(i - 7)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x0.Pos, OpAMD64BSWAPQ, w.Type)
+               v0 := b.NewValue0(x0.Pos, OpAMD64BSWAPQ, typ.UInt64)
                v0.AddArg(w)
                v.AddArg3(p, v0, mem)
                return true
        }
        // match: (MOVBstore [i] {s} p7 w x6:(MOVBstore [i] {s} p6 (SHRQconst [8] w) x5:(MOVBstore [i] {s} p5 (SHRQconst [16] w) x4:(MOVBstore [i] {s} p4 (SHRQconst [24] w) x3:(MOVBstore [i] {s} p3 (SHRQconst [32] w) x2:(MOVBstore [i] {s} p2 (SHRQconst [40] w) x1:(MOVBstore [i] {s} p1 (SHRQconst [48] w) x0:(MOVBstore [i] {s} p0 (SHRQconst [56] w) mem))))))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && x3.Uses == 1 && x4.Uses == 1 && x5.Uses == 1 && x6.Uses == 1 && sequentialAddresses(p0, p1, 1) && sequentialAddresses(p1, p2, 1) && sequentialAddresses(p2, p3, 1) && sequentialAddresses(p3, p4, 1) && sequentialAddresses(p4, p5, 1) && sequentialAddresses(p5, p6, 1) && sequentialAddresses(p6, p7, 1) && clobber(x0, x1, x2, x3, x4, x5, x6)
-       // result: (MOVQstore [i] {s} p0 (BSWAPQ <w.Type> w) mem)
+       // result: (MOVQstore [i] {s} p0 (BSWAPQ <typ.UInt64> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10817,7 +10817,7 @@ func rewriteValueAMD64_OpAMD64MOVBstore(v *Value) bool {
                v.reset(OpAMD64MOVQstore)
                v.AuxInt = int32ToAuxInt(i)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x0.Pos, OpAMD64BSWAPQ, w.Type)
+               v0 := b.NewValue0(x0.Pos, OpAMD64BSWAPQ, typ.UInt64)
                v0.AddArg(w)
                v.AddArg3(p0, v0, mem)
                return true

diff --git a/src/cmd/compile/internal/ssa/rewriteARM64.go b/src/cmd/compile/internal/ssa/rewriteARM64.go
index bd3a3a390c5097d8e868ccb3cc25f1d900a04786..b7466f945f0ec4e7aa45386fd724a52c811c9733 100644 (file)
--- a/src/cmd/compile/internal/ssa/rewriteARM64.go
+++ b/src/cmd/compile/internal/ssa/rewriteARM64.go
@@ -8726,6 +8726,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        v_0 := v.Args[0]
        b := v.Block
        config := b.Func.Config
+       typ := &b.Func.Config.Types
        // match: (MOVBstore [off1] {sym} (ADDconst [off2] ptr) val mem)
        // cond: is32Bit(int64(off1)+off2) && (ptr.Op != OpSB || !config.ctxt.Flag_dynlink)
        // result: (MOVBstore [off1+int32(off2)] {sym} ptr val mem)
@@ -9396,7 +9397,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} ptr w x0:(MOVBstore [i-1] {s} ptr (SRLconst [8] w) x1:(MOVBstore [i-2] {s} ptr (SRLconst [16] w) x2:(MOVBstore [i-3] {s} ptr (SRLconst [24] w) x3:(MOVBstore [i-4] {s} ptr (SRLconst [32] w) x4:(MOVBstore [i-5] {s} ptr (SRLconst [40] w) x5:(MOVBstore [i-6] {s} ptr (SRLconst [48] w) x6:(MOVBstore [i-7] {s} ptr (SRLconst [56] w) mem))))))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && x3.Uses == 1 && x4.Uses == 1 && x5.Uses == 1 && x6.Uses == 1 && clobber(x0, x1, x2, x3, x4, x5, x6)
-       // result: (MOVDstore [i-7] {s} ptr (REV <w.Type> w) mem)
+       // result: (MOVDstore [i-7] {s} ptr (REV <typ.UInt64> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -9489,14 +9490,14 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                v.reset(OpARM64MOVDstore)
                v.AuxInt = int32ToAuxInt(i - 7)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x6.Pos, OpARM64REV, w.Type)
+               v0 := b.NewValue0(x6.Pos, OpARM64REV, typ.UInt64)
                v0.AddArg(w)
                v.AddArg3(ptr, v0, mem)
                return true
        }
        // match: (MOVBstore [7] {s} p w x0:(MOVBstore [6] {s} p (SRLconst [8] w) x1:(MOVBstore [5] {s} p (SRLconst [16] w) x2:(MOVBstore [4] {s} p (SRLconst [24] w) x3:(MOVBstore [3] {s} p (SRLconst [32] w) x4:(MOVBstore [2] {s} p (SRLconst [40] w) x5:(MOVBstore [1] {s} p1:(ADD ptr1 idx1) (SRLconst [48] w) x6:(MOVBstoreidx ptr0 idx0 (SRLconst [56] w) mem))))))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && x3.Uses == 1 && x4.Uses == 1 && x5.Uses == 1 && x6.Uses == 1 && s == nil && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1)) && isSamePtr(p1, p) && clobber(x0, x1, x2, x3, x4, x5, x6)
-       // result: (MOVDstoreidx ptr0 idx0 (REV <w.Type> w) mem)
+       // result: (MOVDstoreidx ptr0 idx0 (REV <typ.UInt64> w) mem)
        for {
                if auxIntToInt32(v.AuxInt) != 7 {
                        break
@@ -9595,7 +9596,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                                continue
                        }
                        v.reset(OpARM64MOVDstoreidx)
-                       v0 := b.NewValue0(x5.Pos, OpARM64REV, w.Type)
+                       v0 := b.NewValue0(x5.Pos, OpARM64REV, typ.UInt64)
                        v0.AddArg(w)
                        v.AddArg4(ptr0, idx0, v0, mem)
                        return true
@@ -9604,7 +9605,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} ptr w x0:(MOVBstore [i-1] {s} ptr (UBFX [armBFAuxInt(8, 24)] w) x1:(MOVBstore [i-2] {s} ptr (UBFX [armBFAuxInt(16, 16)] w) x2:(MOVBstore [i-3] {s} ptr (UBFX [armBFAuxInt(24, 8)] w) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && clobber(x0, x1, x2)
-       // result: (MOVWstore [i-3] {s} ptr (REVW <w.Type> w) mem)
+       // result: (MOVWstore [i-3] {s} ptr (REVW <typ.UInt32> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -9649,14 +9650,14 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                v.reset(OpARM64MOVWstore)
                v.AuxInt = int32ToAuxInt(i - 3)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x2.Pos, OpARM64REVW, w.Type)
+               v0 := b.NewValue0(x2.Pos, OpARM64REVW, typ.UInt32)
                v0.AddArg(w)
                v.AddArg3(ptr, v0, mem)
                return true
        }
        // match: (MOVBstore [3] {s} p w x0:(MOVBstore [2] {s} p (UBFX [armBFAuxInt(8, 24)] w) x1:(MOVBstore [1] {s} p1:(ADD ptr1 idx1) (UBFX [armBFAuxInt(16, 16)] w) x2:(MOVBstoreidx ptr0 idx0 (UBFX [armBFAuxInt(24, 8)] w) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s == nil && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1)) && isSamePtr(p1, p) && clobber(x0, x1, x2)
-       // result: (MOVWstoreidx ptr0 idx0 (REVW <w.Type> w) mem)
+       // result: (MOVWstoreidx ptr0 idx0 (REVW <typ.UInt32> w) mem)
        for {
                if auxIntToInt32(v.AuxInt) != 3 {
                        break
@@ -9707,7 +9708,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                                continue
                        }
                        v.reset(OpARM64MOVWstoreidx)
-                       v0 := b.NewValue0(x1.Pos, OpARM64REVW, w.Type)
+                       v0 := b.NewValue0(x1.Pos, OpARM64REVW, typ.UInt32)
                        v0.AddArg(w)
                        v.AddArg4(ptr0, idx0, v0, mem)
                        return true
@@ -9716,7 +9717,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} ptr w x0:(MOVBstore [i-1] {s} ptr (SRLconst [8] (MOVDreg w)) x1:(MOVBstore [i-2] {s} ptr (SRLconst [16] (MOVDreg w)) x2:(MOVBstore [i-3] {s} ptr (SRLconst [24] (MOVDreg w)) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && clobber(x0, x1, x2)
-       // result: (MOVWstore [i-3] {s} ptr (REVW <w.Type> w) mem)
+       // result: (MOVWstore [i-3] {s} ptr (REVW <typ.UInt32> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -9773,14 +9774,14 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                v.reset(OpARM64MOVWstore)
                v.AuxInt = int32ToAuxInt(i - 3)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x2.Pos, OpARM64REVW, w.Type)
+               v0 := b.NewValue0(x2.Pos, OpARM64REVW, typ.UInt32)
                v0.AddArg(w)
                v.AddArg3(ptr, v0, mem)
                return true
        }
        // match: (MOVBstore [3] {s} p w x0:(MOVBstore [2] {s} p (SRLconst [8] (MOVDreg w)) x1:(MOVBstore [1] {s} p1:(ADD ptr1 idx1) (SRLconst [16] (MOVDreg w)) x2:(MOVBstoreidx ptr0 idx0 (SRLconst [24] (MOVDreg w)) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s == nil && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1)) && isSamePtr(p1, p) && clobber(x0, x1, x2)
-       // result: (MOVWstoreidx ptr0 idx0 (REVW <w.Type> w) mem)
+       // result: (MOVWstoreidx ptr0 idx0 (REVW <typ.UInt32> w) mem)
        for {
                if auxIntToInt32(v.AuxInt) != 3 {
                        break
@@ -9843,7 +9844,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                                continue
                        }
                        v.reset(OpARM64MOVWstoreidx)
-                       v0 := b.NewValue0(x1.Pos, OpARM64REVW, w.Type)
+                       v0 := b.NewValue0(x1.Pos, OpARM64REVW, typ.UInt32)
                        v0.AddArg(w)
                        v.AddArg4(ptr0, idx0, v0, mem)
                        return true
@@ -9852,7 +9853,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} ptr w x0:(MOVBstore [i-1] {s} ptr (SRLconst [8] w) x1:(MOVBstore [i-2] {s} ptr (SRLconst [16] w) x2:(MOVBstore [i-3] {s} ptr (SRLconst [24] w) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && clobber(x0, x1, x2)
-       // result: (MOVWstore [i-3] {s} ptr (REVW <w.Type> w) mem)
+       // result: (MOVWstore [i-3] {s} ptr (REVW <typ.UInt32> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -9897,14 +9898,14 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                v.reset(OpARM64MOVWstore)
                v.AuxInt = int32ToAuxInt(i - 3)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x2.Pos, OpARM64REVW, w.Type)
+               v0 := b.NewValue0(x2.Pos, OpARM64REVW, typ.UInt32)
                v0.AddArg(w)
                v.AddArg3(ptr, v0, mem)
                return true
        }
        // match: (MOVBstore [3] {s} p w x0:(MOVBstore [2] {s} p (SRLconst [8] w) x1:(MOVBstore [1] {s} p1:(ADD ptr1 idx1) (SRLconst [16] w) x2:(MOVBstoreidx ptr0 idx0 (SRLconst [24] w) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && s == nil && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1)) && isSamePtr(p1, p) && clobber(x0, x1, x2)
-       // result: (MOVWstoreidx ptr0 idx0 (REVW <w.Type> w) mem)
+       // result: (MOVWstoreidx ptr0 idx0 (REVW <typ.UInt32> w) mem)
        for {
                if auxIntToInt32(v.AuxInt) != 3 {
                        break
@@ -9955,7 +9956,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                                continue
                        }
                        v.reset(OpARM64MOVWstoreidx)
-                       v0 := b.NewValue0(x1.Pos, OpARM64REVW, w.Type)
+                       v0 := b.NewValue0(x1.Pos, OpARM64REVW, typ.UInt32)
                        v0.AddArg(w)
                        v.AddArg4(ptr0, idx0, v0, mem)
                        return true
@@ -9964,7 +9965,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} ptr w x:(MOVBstore [i-1] {s} ptr (SRLconst [8] w) mem))
        // cond: x.Uses == 1 && clobber(x)
-       // result: (MOVHstore [i-1] {s} ptr (REV16W <w.Type> w) mem)
+       // result: (MOVHstore [i-1] {s} ptr (REV16W <typ.UInt16> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -9985,14 +9986,14 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                v.reset(OpARM64MOVHstore)
                v.AuxInt = int32ToAuxInt(i - 1)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x.Pos, OpARM64REV16W, w.Type)
+               v0 := b.NewValue0(x.Pos, OpARM64REV16W, typ.UInt16)
                v0.AddArg(w)
                v.AddArg3(ptr, v0, mem)
                return true
        }
        // match: (MOVBstore [1] {s} (ADD ptr1 idx1) w x:(MOVBstoreidx ptr0 idx0 (SRLconst [8] w) mem))
        // cond: x.Uses == 1 && s == nil && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1)) && clobber(x)
-       // result: (MOVHstoreidx ptr0 idx0 (REV16W <w.Type> w) mem)
+       // result: (MOVHstoreidx ptr0 idx0 (REV16W <typ.UInt16> w) mem)
        for {
                if auxIntToInt32(v.AuxInt) != 1 {
                        break
@@ -10020,7 +10021,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                                continue
                        }
                        v.reset(OpARM64MOVHstoreidx)
-                       v0 := b.NewValue0(v.Pos, OpARM64REV16W, w.Type)
+                       v0 := b.NewValue0(v.Pos, OpARM64REV16W, typ.UInt16)
                        v0.AddArg(w)
                        v.AddArg4(ptr0, idx0, v0, mem)
                        return true
@@ -10029,7 +10030,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} ptr w x:(MOVBstore [i-1] {s} ptr (UBFX [armBFAuxInt(8, 8)] w) mem))
        // cond: x.Uses == 1 && clobber(x)
-       // result: (MOVHstore [i-1] {s} ptr (REV16W <w.Type> w) mem)
+       // result: (MOVHstore [i-1] {s} ptr (REV16W <typ.UInt16> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10050,14 +10051,14 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                v.reset(OpARM64MOVHstore)
                v.AuxInt = int32ToAuxInt(i - 1)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x.Pos, OpARM64REV16W, w.Type)
+               v0 := b.NewValue0(x.Pos, OpARM64REV16W, typ.UInt16)
                v0.AddArg(w)
                v.AddArg3(ptr, v0, mem)
                return true
        }
        // match: (MOVBstore [1] {s} (ADD ptr1 idx1) w x:(MOVBstoreidx ptr0 idx0 (UBFX [armBFAuxInt(8, 8)] w) mem))
        // cond: x.Uses == 1 && s == nil && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1)) && clobber(x)
-       // result: (MOVHstoreidx ptr0 idx0 (REV16W <w.Type> w) mem)
+       // result: (MOVHstoreidx ptr0 idx0 (REV16W <typ.UInt16> w) mem)
        for {
                if auxIntToInt32(v.AuxInt) != 1 {
                        break
@@ -10085,7 +10086,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                                continue
                        }
                        v.reset(OpARM64MOVHstoreidx)
-                       v0 := b.NewValue0(v.Pos, OpARM64REV16W, w.Type)
+                       v0 := b.NewValue0(v.Pos, OpARM64REV16W, typ.UInt16)
                        v0.AddArg(w)
                        v.AddArg4(ptr0, idx0, v0, mem)
                        return true
@@ -10094,7 +10095,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} ptr w x:(MOVBstore [i-1] {s} ptr (SRLconst [8] (MOVDreg w)) mem))
        // cond: x.Uses == 1 && clobber(x)
-       // result: (MOVHstore [i-1] {s} ptr (REV16W <w.Type> w) mem)
+       // result: (MOVHstore [i-1] {s} ptr (REV16W <typ.UInt16> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10119,14 +10120,14 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                v.reset(OpARM64MOVHstore)
                v.AuxInt = int32ToAuxInt(i - 1)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x.Pos, OpARM64REV16W, w.Type)
+               v0 := b.NewValue0(x.Pos, OpARM64REV16W, typ.UInt16)
                v0.AddArg(w)
                v.AddArg3(ptr, v0, mem)
                return true
        }
        // match: (MOVBstore [1] {s} (ADD ptr1 idx1) w x:(MOVBstoreidx ptr0 idx0 (SRLconst [8] (MOVDreg w)) mem))
        // cond: x.Uses == 1 && s == nil && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1)) && clobber(x)
-       // result: (MOVHstoreidx ptr0 idx0 (REV16W <w.Type> w) mem)
+       // result: (MOVHstoreidx ptr0 idx0 (REV16W <typ.UInt16> w) mem)
        for {
                if auxIntToInt32(v.AuxInt) != 1 {
                        break
@@ -10158,7 +10159,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                                continue
                        }
                        v.reset(OpARM64MOVHstoreidx)
-                       v0 := b.NewValue0(v.Pos, OpARM64REV16W, w.Type)
+                       v0 := b.NewValue0(v.Pos, OpARM64REV16W, typ.UInt16)
                        v0.AddArg(w)
                        v.AddArg4(ptr0, idx0, v0, mem)
                        return true
@@ -10167,7 +10168,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
        }
        // match: (MOVBstore [i] {s} ptr w x:(MOVBstore [i-1] {s} ptr (UBFX [armBFAuxInt(8, 24)] w) mem))
        // cond: x.Uses == 1 && clobber(x)
-       // result: (MOVHstore [i-1] {s} ptr (REV16W <w.Type> w) mem)
+       // result: (MOVHstore [i-1] {s} ptr (REV16W <typ.UInt16> w) mem)
        for {
                i := auxIntToInt32(v.AuxInt)
                s := auxToSym(v.Aux)
@@ -10188,14 +10189,14 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                v.reset(OpARM64MOVHstore)
                v.AuxInt = int32ToAuxInt(i - 1)
                v.Aux = symToAux(s)
-               v0 := b.NewValue0(x.Pos, OpARM64REV16W, w.Type)
+               v0 := b.NewValue0(x.Pos, OpARM64REV16W, typ.UInt16)
                v0.AddArg(w)
                v.AddArg3(ptr, v0, mem)
                return true
        }
        // match: (MOVBstore [1] {s} (ADD ptr1 idx1) w x:(MOVBstoreidx ptr0 idx0 (UBFX [armBFAuxInt(8, 24)] w) mem))
        // cond: x.Uses == 1 && s == nil && (isSamePtr(ptr0, ptr1) && isSamePtr(idx0, idx1) || isSamePtr(ptr0, idx1) && isSamePtr(idx0, ptr1)) && clobber(x)
-       // result: (MOVHstoreidx ptr0 idx0 (REV16W <w.Type> w) mem)
+       // result: (MOVHstoreidx ptr0 idx0 (REV16W <typ.UInt16> w) mem)
        for {
                if auxIntToInt32(v.AuxInt) != 1 {
                        break
@@ -10223,7 +10224,7 @@ func rewriteValueARM64_OpARM64MOVBstore(v *Value) bool {
                                continue
                        }
                        v.reset(OpARM64MOVHstoreidx)
-                       v0 := b.NewValue0(v.Pos, OpARM64REV16W, w.Type)
+                       v0 := b.NewValue0(v.Pos, OpARM64REV16W, typ.UInt16)
                        v0.AddArg(w)
                        v.AddArg4(ptr0, idx0, v0, mem)
                        return true
@@ -10238,6 +10239,7 @@ func rewriteValueARM64_OpARM64MOVBstoreidx(v *Value) bool {
        v_1 := v.Args[1]
        v_0 := v.Args[0]
        b := v.Block
+       typ := &b.Func.Config.Types
        // match: (MOVBstoreidx ptr (MOVDconst [c]) val mem)
        // cond: is32Bit(c)
        // result: (MOVBstore [int32(c)] ptr val mem)
@@ -10400,7 +10402,7 @@ func rewriteValueARM64_OpARM64MOVBstoreidx(v *Value) bool {
        }
        // match: (MOVBstoreidx ptr (ADDconst [3] idx) w x0:(MOVBstoreidx ptr (ADDconst [2] idx) (UBFX [armBFAuxInt(8, 24)] w) x1:(MOVBstoreidx ptr (ADDconst [1] idx) (UBFX [armBFAuxInt(16, 16)] w) x2:(MOVBstoreidx ptr idx (UBFX [armBFAuxInt(24, 8)] w) mem))))
        // cond: x0.Uses == 1 && x1.Uses == 1 && x2.Uses == 1 && clobber(x0, x1, x2)
-       // result: (MOVWstoreidx ptr idx (REVW <w.Type> w) mem)
+       // result: (MOVWstoreidx ptr idx (REVW <typ.UInt32> w) mem)
        for {
                ptr := v_0
                if v_1.Op != OpARM64ADDconst || auxIntToInt64(v_1.AuxInt) != 3 {
@@ -10453,7 +10455,7 @@ func rewriteValueARM64_OpARM64MOVBstoreidx(v *Value) bool {
                        break
                }
                v.reset(OpARM64MOVWstoreidx)
-               v0 := b.NewValue0(v.Pos, OpARM64REVW, w.Type)
+               v0 := b.NewValue0(v.Pos, OpARM64REVW, typ.UInt32)
                v0.AddArg(w)
                v.AddArg4(ptr, idx, v0, mem)
                return true
@@ -10519,7 +10521,7 @@ func rewriteValueARM64_OpARM64MOVBstoreidx(v *Value) bool {
        }
        // match: (MOVBstoreidx ptr (ADDconst [1] idx) w x:(MOVBstoreidx ptr idx (UBFX [armBFAuxInt(8, 8)] w) mem))
        // cond: x.Uses == 1 && clobber(x)
-       // result: (MOVHstoreidx ptr idx (REV16W <w.Type> w) mem)
+       // result: (MOVHstoreidx ptr idx (REV16W <typ.UInt16> w) mem)
        for {
                ptr := v_0
                if v_1.Op != OpARM64ADDconst || auxIntToInt64(v_1.AuxInt) != 1 {
@@ -10540,7 +10542,7 @@ func rewriteValueARM64_OpARM64MOVBstoreidx(v *Value) bool {
                        break
                }
                v.reset(OpARM64MOVHstoreidx)
-               v0 := b.NewValue0(v.Pos, OpARM64REV16W, w.Type)
+               v0 := b.NewValue0(v.Pos, OpARM64REV16W, typ.UInt16)
                v0.AddArg(w)
                v.AddArg4(ptr, idx, v0, mem)
                return true

diff --git a/test/fixedbugs/issue59367.go b/test/fixedbugs/issue59367.go
new file mode 100644 (file)
index 0000000..32a79e1
--- /dev/null
+++ b/test/fixedbugs/issue59367.go
@@ -0,0 +1,80 @@
+// run
+
+// Copyright 2023 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+package main
+
+func main() {
+       var b [8]byte
+       one := uint8(1)
+       f16(&one, b[:2])
+       if b[1] != 1 {
+               println("2-byte value lost")
+       }
+       f32(&one, b[:4])
+       if b[3] != 1 {
+               println("4-byte value lost")
+       }
+       f64(&one, b[:8])
+       if b[7] != 1 {
+               println("8-byte value lost")
+       }
+}
+
+//go:noinline
+func f16(p *uint8, b []byte) {
+       _ = b[1]            // bounds check
+       x := *p             // load a byte
+       y := uint16(x)      // zero extend to 16 bits
+       b[0] = byte(y >> 8) // compute ROLW
+       b[1] = byte(y)
+       nop()               // spill/restore ROLW
+       b[0] = byte(y >> 8) // use ROLW
+       b[1] = byte(y)
+}
+
+//go:noinline
+func f32(p *uint8, b []byte) {
+       _ = b[3]             // bounds check
+       x := *p              // load a byte
+       y := uint32(x)       // zero extend to 32 bits
+       b[0] = byte(y >> 24) // compute ROLL
+       b[1] = byte(y >> 16)
+       b[2] = byte(y >> 8)
+       b[3] = byte(y)
+       nop()                // spill/restore ROLL
+       b[0] = byte(y >> 24) // use ROLL
+       b[1] = byte(y >> 16)
+       b[2] = byte(y >> 8)
+       b[3] = byte(y)
+}
+
+//go:noinline
+func f64(p *uint8, b []byte) {
+       _ = b[7]             // bounds check
+       x := *p              // load a byte
+       y := uint64(x)       // zero extend to 64 bits
+       b[0] = byte(y >> 56) // compute ROLQ
+       b[1] = byte(y >> 48)
+       b[2] = byte(y >> 40)
+       b[3] = byte(y >> 32)
+       b[4] = byte(y >> 24)
+       b[5] = byte(y >> 16)
+       b[6] = byte(y >> 8)
+       b[7] = byte(y)
+       nop()                // spill/restore ROLQ
+       b[0] = byte(y >> 56) // use ROLQ
+       b[1] = byte(y >> 48)
+       b[2] = byte(y >> 40)
+       b[3] = byte(y >> 32)
+       b[4] = byte(y >> 24)
+       b[5] = byte(y >> 16)
+       b[6] = byte(y >> 8)
+       b[7] = byte(y)
+}
+
+//go:noinline
+func nop() {
+}