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DwarfDebug: Avoid creating new DebugLocs in the backend

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Don't use `DebugLoc::getFnDebugLoc()`, which creates new `MDLocation`s,
in the backend.  We just want to grab the subprogram here anyway.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@233601 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Duncan P. N. Exon Smith
2015-03-30 21:32:28 +00:00
parent 769b935ebc
commit 494ae8db19
3 changed files with 15 additions and 5 deletions
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8
lib/CodeGen/AsmPrinter/DwarfDebug.cpp
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@ -1168,13 +1168,11 @@ void DwarfDebug::beginFunction(const MachineFunction *MF) {
// Record beginning of function.
PrologEndLoc = findPrologueEndLoc(MF);
if (PrologEndLoc) {
DebugLoc FnStartDL = PrologEndLoc.getFnDebugLoc();
if (MDLocation *L = PrologEndLoc) {
// We'd like to list the prologue as "not statements" but GDB behaves
// poorly if we do that. Revisit this with caution/GDB (7.5+) testing.
recordSourceLine(FnStartDL.getLine(), FnStartDL.getCol(),
FnStartDL.getScope(), DWARF2_FLAG_IS_STMT);
auto *SP = L->getInlinedAtScope()->getSubprogram();
recordSourceLine(SP->getScopeLine(), 0, SP, DWARF2_FLAG_IS_STMT);
}
}