From ede7eeae328d455b00d600639adacda695a499b6 Mon Sep 17 00:00:00 2001 From: Arnold Schwaighofer Date: Tue, 4 Jun 2013 22:15:43 +0000 Subject: 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 --- lib/Target/ARM/ARMBaseInstrInfo.cpp | 2 ++ 1 file changed, 2 insertions(+) (limited to 'lib') 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. -- cgit v1.2.3