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For a small sized stack, we encode that value directly with no "stack adjust" value.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145952 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Bill Wendling 2011-12-06 19:09:06 +00:00
parent 4c7ffb6a7e
commit 75e14e0ebd
1 changed files with 3 additions and 1 deletions
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4
lib/Target/X86/X86FrameLowering.cpp
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@ -565,7 +565,7 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const {
if ((FullOffset & 0xFF) == FullOffset) { if ((FullOffset & 0xFF) == FullOffset) {
// Frameless stack. // Frameless stack.
CompactUnwindEncoding |= 0x02000000; CompactUnwindEncoding |= 0x02000000;
CompactUnwindEncoding |= (FullOffset & 0xFF) << 16; CompactUnwindEncoding |= (CFAOffset & 0xFF) << 16;
} else { } else {
if ((CFAOffset & 0x7) != CFAOffset) if ((CFAOffset & 0x7) != CFAOffset)
// The extra stack adjustments are too big for us to handle. // The extra stack adjustments are too big for us to handle.
@ -582,6 +582,8 @@ uint32_t X86FrameLowering::getCompactUnwindEncoding(MachineFunction &MF) const {
CompactUnwindEncoding |= (CFAOffset & 0x7) << 13; CompactUnwindEncoding |= (CFAOffset & 0x7) << 13;
} }
CompactUnwindEncoding |= ((6 - SavedRegIdx) & 0x7) << 10;
// Get the encoding of the saved registers when we don't have a frame // Get the encoding of the saved registers when we don't have a frame
// pointer. // pointer.
uint32_t RegEnc = encodeCompactUnwindRegistersWithoutFrame(SavedRegs, uint32_t RegEnc = encodeCompactUnwindRegistersWithoutFrame(SavedRegs,