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While mapping llvm.dbg.declare intrinsic manually map its operand, if possible,

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because it points to an alloca instruction through metadata.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93757 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Devang Patel 2010-01-18 19:52:14 +00:00
parent b905b09f21
commit f9d5c5cf9f
2 changed files with 30 additions and 0 deletions
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18
lib/Transforms/Utils/ValueMapper.cpp
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@ -16,6 +16,7 @@
#include "llvm/DerivedTypes.h" // For getNullValue(Type::Int32Ty)
#include "llvm/Constants.h"
#include "llvm/Function.h"
#include "llvm/IntrinsicInst.h"
#include "llvm/Metadata.h"
#include "llvm/ADT/SmallVector.h"
#include "llvm/Support/ErrorHandling.h"
@ -130,4 +131,21 @@ void llvm::RemapInstruction(Instruction *I, ValueMapTy &ValueMap) {
assert(V && "Referenced value not in value map!");
*op = V;
}
// Map llvm.dbg.declare instruction's first operand, which points to
// alloca instruction through MDNode. Since MDNodes are not counted as normal
// uses, this will fall through cracks otherwise.
const DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(I);
if (!DDI) return;
Value *AddrInsn = DDI->getAddress();
if (!AddrInsn) return;
ValueMapTy::iterator VMI = ValueMap.find(AddrInsn);
if (VMI == ValueMap.end()) return;
Value *Elts[] = { VMI->second };
MDNode *NewAddr = MDNode::get(AddrInsn->getContext(), Elts, 1);
I->setOperand(1, NewAddr);
}

12
test/FrontendC/2010-01-18-Inlined-Debug.c Normal file
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@ -0,0 +1,12 @@
// PR: 6058
// RUN: %llvmgcc -g -S %s -o - | llc -O0 -o /dev/null
static inline int foo(double) __attribute__ ((always_inline));
static inline int foo(double __x) { return __x; }
void bar(double x) {
foo(x);
}