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Correctly handle multiple DBG_VALUE instructions at the same SlotIndex.

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It is possible to have multiple DBG_VALUEs for the same variable:

32L TEST32rr %vreg0<kill>, %vreg0, %EFLAGS<imp-def>; GR32:%vreg0
    DBG_VALUE 2, 0, !"i"
    DBG_VALUE %noreg, %0, !"i"

When that happens, keep the last one instead of the first.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136842 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Jakob Stoklund Olesen 2011-08-03 23:44:31 +00:00
parent fbfb806e3f
commit 79513ed859
1 changed files with 3 additions and 0 deletions
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3
lib/CodeGen/LiveDebugVariables.cpp
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@ -179,6 +179,9 @@ public:
LocMap::iterator I = locInts.find(Idx);
if (!I.valid() || I.start() != Idx)
I.insert(Idx, Idx.getNextSlot(), getLocationNo(LocMO));
else
// A later DBG_VALUE at the same SlotIndex overrides the old location.
I.setValue(getLocationNo(LocMO));
}
/// extendDef - Extend the current definition as far as possible down the