cmd/compile: update TestStmtLines threshold for riscv64

CL402374 default regabi for riscv64 but TestStmtLines
keep fail trybot within a tiny overlimit (2.006% > 2%).
This CL update this threshold to 3% for riscv64 as an
acceptable temporary solution.

Change-Id: I5c6f37099a76bc048998eb95f49944dbe55492f4
Reviewed-on: https://go-review.googlesource.com/c/go/+/404195
Run-TryBot: mzh <mzh@golangcn.org>
Reviewed-by: David Chase <drchase@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Russ Cox <rsc@golang.org>
Reviewed-by: Cherry Mui <cherryyz@google.com>

diff --git a/src/cmd/compile/internal/ssa/stmtlines_test.go b/src/cmd/compile/internal/ssa/stmtlines_test.go
index a94ff9c99462756d117627fb3306babaf91d04c8..673c88a600990206da8a1325c6fe829d1c978223 100644 (file)
--- a/src/cmd/compile/internal/ssa/stmtlines_test.go
+++ b/src/cmd/compile/internal/ssa/stmtlines_test.go
@@ -118,12 +118,17 @@ func TestStmtLines(t *testing.T) {
                }
        }
 
+       var m int
        if runtime.GOARCH == "amd64" {
-               if len(nonStmtLines)*100 > len(lines) { // > 99% obtained on amd64, no backsliding
-                       t.Errorf("Saw too many (amd64, > 1%%) lines without statement marks, total=%d, nostmt=%d ('-run TestStmtLines -v' lists failing lines)\n", len(lines), len(nonStmtLines))
-               }
-       } else if len(nonStmtLines)*100 > 2*len(lines) { // expect 98% elsewhere.
-               t.Errorf("Saw too many (not amd64, > 2%%) lines without statement marks, total=%d, nostmt=%d ('-run TestStmtLines -v' lists failing lines)\n", len(lines), len(nonStmtLines))
+               m = 1 // > 99% obtained on amd64, no backsliding
+       } else if runtime.GOARCH == "riscv64" {
+               m = 3 // XXX temporary update threshold to 97% for regabi
+       } else {
+               m = 2 // expect 98% elsewhere.
+       }
+
+       if len(nonStmtLines)*100 > m*len(lines) {
+               t.Errorf("Saw too many (%s, > %d%%) lines without statement marks, total=%d, nostmt=%d ('-run TestStmtLines -v' lists failing lines)\n", runtime.GOARCH, m, len(lines), len(nonStmtLines))
        }
        t.Logf("Saw %d out of %d lines without statement marks", len(nonStmtLines), len(lines))
        if testing.Verbose() {