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| author | Charles Davis <cdavis@mines.edu> | 2010-02-19 18:17:13 +0000 |
|---|---|---|
| committer | Charles Davis <cdavis@mines.edu> | 2010-02-19 18:17:13 +0000 |
| commit | 7e4776776347d6007f59244e902f48537ab21dda (patch) | |
| tree | 449efe80e3aadfc72364c746b1fece06de450235 /llvm/lib | |
| parent | 836ec94c8e1e639ebbc18d0fb5541f6672ef2ebf (diff) | |
| download | bcm5719-llvm-7e4776776347d6007f59244e902f48537ab21dda.tar.gz bcm5719-llvm-7e4776776347d6007f59244e902f48537ab21dda.zip | |
Add support for the 'alignstack' attribute to the x86 backend. Fixes PR5254.
Also, FileCheck'ize a test.
llvm-svn: 96686
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/CodeGen/MachineFunction.cpp | 3 | ||||
| -rw-r--r-- | llvm/lib/Target/X86/X86RegisterInfo.cpp | 4 |
2 files changed, 6 insertions, 1 deletions
diff --git a/llvm/lib/CodeGen/MachineFunction.cpp b/llvm/lib/CodeGen/MachineFunction.cpp index f141c567708..4377d5bd71a 100644 --- a/llvm/lib/CodeGen/MachineFunction.cpp +++ b/llvm/lib/CodeGen/MachineFunction.cpp @@ -95,6 +95,9 @@ MachineFunction::MachineFunction(Function *F, const TargetMachine &TM, MFInfo = 0; FrameInfo = new (Allocator.Allocate<MachineFrameInfo>()) MachineFrameInfo(*TM.getFrameInfo()); + if (Fn->hasFnAttr(Attribute::StackAlignment)) + FrameInfo->setMaxAlignment(Attribute::getStackAlignmentFromAttrs( + Fn->getAttributes().getFnAttributes())); ConstantPool = new (Allocator.Allocate<MachineConstantPool>()) MachineConstantPool(TM.getTargetData()); Alignment = TM.getTargetLowering()->getFunctionAlignment(F); diff --git a/llvm/lib/Target/X86/X86RegisterInfo.cpp b/llvm/lib/Target/X86/X86RegisterInfo.cpp index 85242368c3c..45ff2975086 100644 --- a/llvm/lib/Target/X86/X86RegisterInfo.cpp +++ b/llvm/lib/Target/X86/X86RegisterInfo.cpp @@ -446,8 +446,10 @@ bool X86RegisterInfo::canRealignStack(const MachineFunction &MF) const { bool X86RegisterInfo::needsStackRealignment(const MachineFunction &MF) const { const MachineFrameInfo *MFI = MF.getFrameInfo(); + const Function *F = MF.getFunction(); bool requiresRealignment = - RealignStack && (MFI->getMaxAlignment() > StackAlign); + RealignStack && ((MFI->getMaxAlignment() > StackAlign) || + F->hasFnAttr(Attribute::StackAlignment)); // FIXME: Currently we don't support stack realignment for functions with // variable-sized allocas. |
