diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZInstrInfo.td | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.td b/llvm/lib/Target/SystemZ/SystemZInstrInfo.td index 77a9fdd4add..7a7a3e30863 100644 --- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.td +++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.td @@ -1680,6 +1680,11 @@ def : Pat<(sra (shl (i64 (anyext (i32 (z_select_ccmask 1, 0, imm32zx4:$valid, (i32 63)), (Select64 (LGHI -1), (LGHI 0), imm32zx4:$valid, imm32zx4:$cc)>; +// Avoid generating 2 XOR instructions. (xor (and x, y), y) is +// equivalent to (and (xor x, -1), y) +def : Pat<(and (xor GR64:$x, (i64 -1)), GR64:$y), + (XGR GR64:$y, (NGR GR64:$y, GR64:$x))>; + // Peepholes for turning scalar operations into block operations. defm : BlockLoadStore<anyextloadi8, i32, MVCSequence, NCSequence, OCSequence, XCSequence, 1>; |
