diff options
Diffstat (limited to 'src/cmd/compile/internal/ssa/rewriteAMD64latelower.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/rewriteAMD64latelower.go | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/cmd/compile/internal/ssa/rewriteAMD64latelower.go b/src/cmd/compile/internal/ssa/rewriteAMD64latelower.go index d3dd2633d1..11ecb0b285 100644 --- a/src/cmd/compile/internal/ssa/rewriteAMD64latelower.go +++ b/src/cmd/compile/internal/ssa/rewriteAMD64latelower.go @@ -6,6 +6,12 @@ import "internal/buildcfg" func rewriteValueAMD64latelower(v *Value) bool { switch v.Op { + case OpAMD64MOVBQZX: + return rewriteValueAMD64latelower_OpAMD64MOVBQZX(v) + case OpAMD64MOVLQZX: + return rewriteValueAMD64latelower_OpAMD64MOVLQZX(v) + case OpAMD64MOVWQZX: + return rewriteValueAMD64latelower_OpAMD64MOVWQZX(v) case OpAMD64SARL: return rewriteValueAMD64latelower_OpAMD64SARL(v) case OpAMD64SARQ: @@ -21,6 +27,51 @@ func rewriteValueAMD64latelower(v *Value) bool { } return false } +func rewriteValueAMD64latelower_OpAMD64MOVBQZX(v *Value) bool { + v_0 := v.Args[0] + // match: (MOVBQZX x) + // cond: zeroUpper56Bits(x,3) + // result: x + for { + x := v_0 + if !(zeroUpper56Bits(x, 3)) { + break + } + v.copyOf(x) + return true + } + return false +} +func rewriteValueAMD64latelower_OpAMD64MOVLQZX(v *Value) bool { + v_0 := v.Args[0] + // match: (MOVLQZX x) + // cond: zeroUpper32Bits(x,3) + // result: x + for { + x := v_0 + if !(zeroUpper32Bits(x, 3)) { + break + } + v.copyOf(x) + return true + } + return false +} +func rewriteValueAMD64latelower_OpAMD64MOVWQZX(v *Value) bool { + v_0 := v.Args[0] + // match: (MOVWQZX x) + // cond: zeroUpper48Bits(x,3) + // result: x + for { + x := v_0 + if !(zeroUpper48Bits(x, 3)) { + break + } + v.copyOf(x) + return true + } + return false +} func rewriteValueAMD64latelower_OpAMD64SARL(v *Value) bool { v_1 := v.Args[1] v_0 := v.Args[0] |