diff options
Diffstat (limited to 'llvm/lib/Target/SystemZ/SystemZInstrInfo.td')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZInstrInfo.td | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.td b/llvm/lib/Target/SystemZ/SystemZInstrInfo.td index 10081262389..edef54eef01 100644 --- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.td +++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.td @@ -1029,6 +1029,14 @@ let AddedComplexity = 1 in { (AGFI GR64:$src1, imm64sx32n:$src2)>; } +// And vice versa in one special case, where we need to load a +// constant into a register in any case, but the negated constant +// requires fewer instructions to load. +def : Pat<(z_saddo GR64:$src1, imm64lh16n:$src2), + (SGR GR64:$src1, (LLILH imm64lh16n:$src2))>; +def : Pat<(z_saddo GR64:$src1, imm64lf32n:$src2), + (SGR GR64:$src1, (LLILF imm64lf32n:$src2))>; + // Subtraction producing a carry. let Defs = [CC] in { // Subtraction of a register. |
