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(parent: 095a62c) | patch
cmd/compile: strength-reduce floating point
authorKeith Randall <khr@golang.org>
Mon, 3 Apr 2017 17:17:48 +0000 (10:17 -0700)
committerKeith Randall <khr@golang.org>
Mon, 3 Apr 2017 21:27:03 +0000 (21:27 +0000)
commit63a72fd447abb8a07bee9166e87bfe27780492c3
treef66fa5673eaeccd6c7735e2e537535650bd25b8ftree
parent095a62c3494e5ca6290357d1b4d307f502257578commit | diff
cmd/compile: strength-reduce floating point

x*2 -> x+x
x/c, c power of 2 -> x*(1/c)

Fixes #19827

Change-Id: I74c9f0b5b49b2ed26c0990314c7d1d5f9631b6f1
Reviewed-on: https://go-review.googlesource.com/39295
Run-TryBot: Keith Randall <khr@golang.org>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: David Chase <drchase@google.com>
src/cmd/compile/internal/gc/asm_test.go diff | blob | history
src/cmd/compile/internal/gc/float_test.go diff | blob | history
src/cmd/compile/internal/ssa/gen/generic.rules diff | blob | history
src/cmd/compile/internal/ssa/rewrite.go diff | blob | history
src/cmd/compile/internal/ssa/rewritegeneric.go diff | blob | history
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