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Set dynamic stack realignment to real values.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86602 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jim Grosbach 2009-11-09 22:32:03 +00:00
parent ba565bfc21
commit ad353c74ad
1 changed files with 3 additions and 11 deletions
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14
lib/Target/ARM/ARMBaseRegisterInfo.cpp
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@ -476,11 +476,7 @@ ARMBaseRegisterInfo::UpdateRegAllocHint(unsigned Reg, unsigned NewReg,
} }
static unsigned calculateMaxStackAlignment(const MachineFrameInfo *FFI) { static unsigned calculateMaxStackAlignment(const MachineFrameInfo *FFI) {
// FIXME: For now, force at least 128-bit alignment. This will push the unsigned MaxAlign = 0;
// 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) {
@ -508,19 +504,15 @@ bool ARMBaseRegisterInfo::hasFP(const MachineFunction &MF) const {
bool ARMBaseRegisterInfo:: bool ARMBaseRegisterInfo::
needsStackRealignment(const MachineFunction &MF) const { needsStackRealignment(const MachineFunction &MF) const {
// Only do this for ARM if explicitly enabled
// FIXME: Once it's passing all the tests, enable by default
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());
} }