[dev.ssa] cmd/compile: handle non-in-place NEG and NOT
This fixes the crypto/subtle tests.
Change-Id: Ie6e721eec3481f67f13de1bfbd7988e227793148
Reviewed-on: https://go-review.googlesource.com/13000
Reviewed-by: Keith Randall <khr@golang.org>
diff --git a/src/cmd/compile/internal/gc/ssa.go b/src/cmd/compile/internal/gc/ssa.go
index 4db33a8..9422970 100644
--- a/src/cmd/compile/internal/gc/ssa.go
+++ b/src/cmd/compile/internal/gc/ssa.go
@@ -2093,9 +2093,18 @@
p.To.Reg = regnum(v.Args[0])
case ssa.OpAMD64NEGQ, ssa.OpAMD64NEGL, ssa.OpAMD64NEGW, ssa.OpAMD64NEGB,
ssa.OpAMD64NOTQ, ssa.OpAMD64NOTL, ssa.OpAMD64NOTW, ssa.OpAMD64NOTB:
+ x := regnum(v.Args[0])
+ r := regnum(v)
+ if x != r {
+ p := Prog(regMoveAMD64(v.Type.Size()))
+ p.From.Type = obj.TYPE_REG
+ p.From.Reg = x
+ p.To.Type = obj.TYPE_REG
+ p.To.Reg = r
+ }
p := Prog(v.Op.Asm())
p.To.Type = obj.TYPE_REG
- p.To.Reg = regnum(v.Args[0])
+ p.To.Reg = r
case ssa.OpSP, ssa.OpSB:
// nothing to do
case ssa.OpAMD64SETEQ, ssa.OpAMD64SETNE,
