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To get more thorough testing from llc-beta nightly runs, do dynamic stack

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realignment regardless of whether it's strictly necessary.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@85476 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2009-10-29 02:41:21 +00:00
parent f2ce516828
commit 84e58d03c9
1 changed files with 9 additions and 4 deletions
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13
lib/Target/ARM/ARMBaseRegisterInfo.cpp
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@ -467,7 +467,11 @@ ARMBaseRegisterInfo::UpdateRegAllocHint(unsigned Reg, unsigned NewReg,
} }
static unsigned calculateMaxStackAlignment(const MachineFrameInfo *FFI) { static unsigned calculateMaxStackAlignment(const MachineFrameInfo *FFI) {
unsigned MaxAlign = 0; // FIXME: For now, force at least 128-bit alignment. This will push the
// nightly tester harder for making sure things work correctly. When
// we're ready to enable this for real, this goes back to starting at zero.
unsigned MaxAlign = 16;
// unsigned MaxAlign = 0;
for (int i = FFI->getObjectIndexBegin(), for (int i = FFI->getObjectIndexBegin(),
e = FFI->getObjectIndexEnd(); i != e; ++i) { e = FFI->getObjectIndexEnd(); i != e; ++i) {
@ -500,14 +504,15 @@ needsStackRealignment(const MachineFunction &MF) const {
if (!ARMDynamicStackAlign) if (!ARMDynamicStackAlign)
return false; return false;
// FIXME: To force more brutal testing, realign whether we need to or not.
// Change this to be more selective when we turn it on for real, of course.
const MachineFrameInfo *MFI = MF.getFrameInfo(); const MachineFrameInfo *MFI = MF.getFrameInfo();
const ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>(); const ARMFunctionInfo *AFI = MF.getInfo<ARMFunctionInfo>();
unsigned StackAlign = MF.getTarget().getFrameInfo()->getStackAlignment(); // unsigned StackAlign = MF.getTarget().getFrameInfo()->getStackAlignment();
return (RealignStack && return (RealignStack &&
!AFI->isThumb1OnlyFunction() && !AFI->isThumb1OnlyFunction() &&
(MFI->getMaxAlignment() > StackAlign) && // (MFI->getMaxAlignment() > StackAlign) &&
!MFI->hasVarSizedObjects()); !MFI->hasVarSizedObjects());
} }
bool ARMBaseRegisterInfo::cannotEliminateFrame(const MachineFunction &MF) const { bool ARMBaseRegisterInfo::cannotEliminateFrame(const MachineFunction &MF) const {