cmd/compile/internal/ssagen: set BitLen32 as intrinsic on PPC64
It was noticed through some other investigation that BitLen32
was not generating the best code and found that it wasn't recognized
as an intrinsic. This corrects that and enables the test for PPC64.
Change-Id: Iab496a8830c8552f507b7292649b1b660f3848b5
Reviewed-on: https://go-review.googlesource.com/c/go/+/355872
Run-TryBot: Lynn Boger <laboger@linux.vnet.ibm.com>
TryBot-Result: Go Bot <gobot@golang.org>
Trust: Lynn Boger <laboger@linux.vnet.ibm.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
diff --git a/src/cmd/compile/internal/ssagen/ssa.go b/src/cmd/compile/internal/ssagen/ssa.go
index 08114b7..5a958a5 100644
--- a/src/cmd/compile/internal/ssagen/ssa.go
+++ b/src/cmd/compile/internal/ssagen/ssa.go
@@ -4421,7 +4421,7 @@
func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
return s.newValue1(ssa.OpBitLen32, types.Types[types.TINT], args[0])
},
- sys.AMD64, sys.ARM64)
+ sys.AMD64, sys.ARM64, sys.PPC64)
addF("math/bits", "Len32",
func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
if s.config.PtrSize == 4 {
@@ -4430,7 +4430,7 @@
x := s.newValue1(ssa.OpZeroExt32to64, types.Types[types.TUINT64], args[0])
return s.newValue1(ssa.OpBitLen64, types.Types[types.TINT], x)
},
- sys.ARM, sys.S390X, sys.MIPS, sys.PPC64, sys.Wasm)
+ sys.ARM, sys.S390X, sys.MIPS, sys.Wasm)
addF("math/bits", "Len16",
func(s *state, n *ir.CallExpr, args []*ssa.Value) *ssa.Value {
if s.config.PtrSize == 4 {
diff --git a/test/codegen/mathbits.go b/test/codegen/mathbits.go
index 2d8790c..859490c 100644
--- a/test/codegen/mathbits.go
+++ b/test/codegen/mathbits.go
@@ -93,6 +93,8 @@
// arm:"CLZ" arm64:"CLZ"
// mips:"CLZ"
// wasm:"I64Clz"
+ // ppc64: "CNTLZW"
+ // ppc64le: "CNTLZW"
return bits.Len32(n)
}
