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Fix a bug where we didn't insert FP_REG_KILL instructions into MBB's that

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contain FP PHI nodes but no other FP defining instructions.  This fixes
183.equake


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@19495 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-01-12 02:57:10 +00:00
parent afce4306ec
commit db8c368d7b
1 changed files with 15 additions and 0 deletions
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15
lib/Target/X86/X86ISelPattern.cpp
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@ -331,6 +331,21 @@ namespace {
// FP_REG_KILL insertion. // FP_REG_KILL insertion.
ContainsFPCode = false; ContainsFPCode = false;
// Scan the PHI nodes that already are inserted into this basic block. If
// any of them is a PHI of a floating point value, we need to insert an
// FP_REG_KILL.
SSARegMap *RegMap = BB->getParent()->getSSARegMap();
for (MachineBasicBlock::iterator I = BB->begin(), E = BB->end();
I != E; ++I) {
assert(I->getOpcode() == X86::PHI &&
"Isn't just PHI nodes?");
if (RegMap->getRegClass(I->getOperand(0).getReg()) ==
X86::RFPRegisterClass) {
ContainsFPCode = true;
break;
}
}
// Compute the RegPressureMap, which is an approximation for the number of // Compute the RegPressureMap, which is an approximation for the number of
// registers required to compute each node. // registers required to compute each node.
ComputeRegPressure(DAG.getRoot()); ComputeRegPressure(DAG.getRoot());