[dev.ssa] cmd/compile: get rid of converts in unsafe.Pointer arithmetic
unsafe.Pointer->uintptr, add, then uintptr->unsafe.Pointer.
Do the add directly on the pointer type instead.
Change-Id: I5a3a32691d0a000e16975857974ed9a1039c6d28
Reviewed-on: https://go-review.googlesource.com/16281
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
diff --git a/src/cmd/compile/internal/ssa/rewritegeneric.go b/src/cmd/compile/internal/ssa/rewritegeneric.go
index 7f9c855..91427e2 100644
--- a/src/cmd/compile/internal/ssa/rewritegeneric.go
+++ b/src/cmd/compile/internal/ssa/rewritegeneric.go
@@ -354,6 +354,30 @@
goto end2eb756398dd4c6b6d126012a26284c89
end2eb756398dd4c6b6d126012a26284c89:
;
+ case OpConvert:
+ // match: (Convert (Add64 (Convert ptr) off))
+ // cond:
+ // result: (Add64 ptr off)
+ {
+ if v.Args[0].Op != OpAdd64 {
+ goto end913a7ecf456c00ffbee36c2dbbf0e1af
+ }
+ if v.Args[0].Args[0].Op != OpConvert {
+ goto end913a7ecf456c00ffbee36c2dbbf0e1af
+ }
+ ptr := v.Args[0].Args[0].Args[0]
+ off := v.Args[0].Args[1]
+ v.Op = OpAdd64
+ v.AuxInt = 0
+ v.Aux = nil
+ v.resetArgs()
+ v.AddArg(ptr)
+ v.AddArg(off)
+ return true
+ }
+ goto end913a7ecf456c00ffbee36c2dbbf0e1af
+ end913a7ecf456c00ffbee36c2dbbf0e1af:
+ ;
case OpEq16:
// match: (Eq16 x x)
// cond:
