diff options
| author | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-06-04 22:15:43 +0000 |
|---|---|---|
| committer | Arnold Schwaighofer <aschwaighofer@apple.com> | 2013-06-04 22:15:43 +0000 |
| commit | ede7eeae328d455b00d600639adacda695a499b6 (patch) | |
| tree | 47cac43c729c381359ceee8d78df9c2fd08adc5b /lib | |
| parent | 54d63ccdb74b11e8f2350c1fd451dbdaf333285a (diff) | |
ARMInstrInfo: Improve isSwiftFastImmShift
An instruction with less than 3 inputs is trivially a fast immediate shift.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@183256 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Target/ARM/ARMBaseInstrInfo.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp index 60050542716..b530515cdd8 100644 --- a/lib/Target/ARM/ARMBaseInstrInfo.cpp +++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp @@ -4152,6 +4152,8 @@ bool ARMBaseInstrInfo::hasNOP() const { } bool ARMBaseInstrInfo::isSwiftFastImmShift(const MachineInstr *MI) const { + if (MI->getNumOperands() < 4) + return true; unsigned ShOpVal = MI->getOperand(3).getImm(); unsigned ShImm = ARM_AM::getSORegOffset(ShOpVal); // Swift supports faster shifts for: lsl 2, lsl 1, and lsr 1. |