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Update this a bit more to represent how the prologue should work:

Browse Source 
a) frame setup instructions define the prologue
b) we shouldn't change our location mid-stream

Add a test to make sure that the stack adjustment stays within
the prologue.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165250 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eric Christopher
2012-10-04 20:46:14 +00:00
parent 726b88fb6a
commit 0313ced016
3 changed files with 39 additions and 5 deletions
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7
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@@ -1355,9 +1355,10 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
if (!MI->isLabel())
AtBlockEntry = false;
// First known non DBG_VALUE location marks beginning of function
// body.
if (PrologEndLoc.isUnknown() && !MI->getDebugLoc().isUnknown())
// First known non-DBG_VALUE and non-frame setup location marks
// the beginning of the function body.
if (!MI->getFlag(MachineInstr::FrameSetup) &&
(PrologEndLoc.isUnknown() && !MI->getDebugLoc().isUnknown()))
PrologEndLoc = MI->getDebugLoc();
// Check if the instruction clobbers any registers with debug vars.