diff options
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/ARM/ARMInstrInfo.td | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/llvm/lib/Target/ARM/ARMInstrInfo.td b/llvm/lib/Target/ARM/ARMInstrInfo.td index ed68b4e994c..75d3de94059 100644 --- a/llvm/lib/Target/ARM/ARMInstrInfo.td +++ b/llvm/lib/Target/ARM/ARMInstrInfo.td @@ -4011,9 +4011,11 @@ def PKHTB : APKHI<0b01101000, 1, (outs GPRnopc:$Rd), // Alternate cases for PKHTB where identities eliminate some nodes. Note that // a shift amount of 0 is *not legal* here, it is PKHBT instead. +// We also can not replace a srl (17..31) by an arithmetic shift we would use in +// pkhtb src1, src2, asr (17..31). def : ARMV6Pat<(or (and GPRnopc:$src1, 0xFFFF0000), - (srl GPRnopc:$src2, imm16_31:$sh)), - (PKHTB GPRnopc:$src1, GPRnopc:$src2, imm16_31:$sh)>; + (srl GPRnopc:$src2, imm16:$sh)), + (PKHTB GPRnopc:$src1, GPRnopc:$src2, imm16:$sh)>; def : ARMV6Pat<(or (and GPRnopc:$src1, 0xFFFF0000), (and (srl GPRnopc:$src2, imm1_15:$sh), 0xFFFF)), (PKHTB GPRnopc:$src1, GPRnopc:$src2, imm1_15:$sh)>; |
