diff options
Diffstat (limited to 'llvm/lib/Target/SystemZ')
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZInstrInfo.td | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZInstrInfo.td b/llvm/lib/Target/SystemZ/SystemZInstrInfo.td index 5e13c7f3461..c47e04b3cfb 100644 --- a/llvm/lib/Target/SystemZ/SystemZInstrInfo.td +++ b/llvm/lib/Target/SystemZ/SystemZInstrInfo.td @@ -1073,3 +1073,12 @@ def : Pat<(add GR64:$src1, imm64zx32n:$src2), (SLGFI GR64:$src1, imm64zx32n:$src2)>; def : Pat<(sub GR64:$src1, (zextloadi32 bdxaddr20only:$addr)), (SLGF GR64:$src1, bdxaddr20only:$addr)>; + +// Optimize sign-extended 1/0 selects to -1/0 selects. This is important +// for vector legalization. +def : Pat<(sra (shl (i32 (z_select_ccmask 1, 0, imm:$cc)), (i32 31)), (i32 31)), + (Select32 (LHI -1), (LHI 0), imm:$cc)>; +def : Pat<(sra (shl (i64 (anyext (i32 (z_select_ccmask 1, 0, imm:$cc)))), + (i32 63)), + (i32 63)), + (Select64 (LGHI -1), (LGHI 0), imm:$cc)>; |
