diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/ARM/ARMISelLowering.cpp | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp index fab3e24..c20ee67 100644 --- a/lib/Target/ARM/ARMISelLowering.cpp +++ b/lib/Target/ARM/ARMISelLowering.cpp @@ -8614,10 +8614,12 @@ bool ARMTargetLowering::isLegalAddressingMode(const AddrMode &AM, /// a register against the immediate without having to materialize the /// immediate into a register. bool ARMTargetLowering::isLegalICmpImmediate(int64_t Imm) const { + // Thumb2 and ARM modes can use cmn for negative immediates. if (!Subtarget->isThumb()) - return ARM_AM::getSOImmVal(Imm) != -1; + return ARM_AM::getSOImmVal(std::abs(Imm)) != -1; if (Subtarget->isThumb2()) - return ARM_AM::getT2SOImmVal(Imm) != -1; + return ARM_AM::getT2SOImmVal(std::abs(Imm)) != -1; + // Thumb1 doesn't have cmn, and only 8-bit immediates. return Imm >= 0 && Imm <= 255; } |