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The X86 maximal stack alignment calculator preserves the CFG. Also, 

be more careful about the return value of runOnMachineFunction.

llvm-svn: 77758
This commit is contained in:
Dan Gohman 2009-08-01 00:31:02 +00:00
parent 6735e10fb0
commit d0984565de
1 changed files with 9 additions and 2 deletions
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11
llvm/lib/Target/X86/X86RegisterInfo.cpp
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@ -1451,14 +1451,21 @@ namespace {
RegNum < RI.getLastVirtReg(); ++RegNum)
MaxAlign = std::max(MaxAlign, RI.getRegClass(RegNum)->getAlignment());
FFI->setMaxAlignment(MaxAlign);
if (FFI->getMaxAlignment() == MaxAlign)
return false;
return false;
FFI->setMaxAlignment(MaxAlign);
return true;
}
virtual const char *getPassName() const {
return "X86 Maximal Stack Alignment Calculator";
}
virtual void getAnalysisUsage(AnalysisUsage &AU) const {
AU.setPreservesCFG();
MachineFunctionPass::getAnalysisUsage(AU);
}
};
char MSAC::ID = 0;