diff options
Diffstat (limited to 'src/cmd/compile/internal/ssa/rewritegeneric.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/rewritegeneric.go | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/rewritegeneric.go b/src/cmd/compile/internal/ssa/rewritegeneric.go index e5a27199a7..7e7cf458ff 100644 --- a/src/cmd/compile/internal/ssa/rewritegeneric.go +++ b/src/cmd/compile/internal/ssa/rewritegeneric.go @@ -4085,6 +4085,26 @@ func rewriteValuegeneric_OpCvt64Fto32F(v *Value) bool { v.AuxInt = float32ToAuxInt(float32(c)) return true } + // match: (Cvt64Fto32F sqrt0:(Sqrt (Cvt32Fto64F x))) + // cond: sqrt0.Uses==1 + // result: (Sqrt32 x) + for { + sqrt0 := v_0 + if sqrt0.Op != OpSqrt { + break + } + sqrt0_0 := sqrt0.Args[0] + if sqrt0_0.Op != OpCvt32Fto64F { + break + } + x := sqrt0_0.Args[0] + if !(sqrt0.Uses == 1) { + break + } + v.reset(OpSqrt32) + v.AddArg(x) + return true + } return false } func rewriteValuegeneric_OpCvt64Fto64(v *Value) bool { |