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- Re-apply 52748 and friends with fix. GetConstantStringInfo() returns an empty string for ConstantAggregateZero case which surprises selectiondag.

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- Correctly handle memcpy from constant string which is zero-initialized.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@52891 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng
2008-06-30 07:31:25 +00:00
parent 2ca698df93
commit 0ff39b3feb
11 changed files with 168 additions and 174 deletions
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5
lib/CodeGen/MachineModuleInfo.cpp
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@ -10,6 +10,7 @@
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/Constants.h"
#include "llvm/Analysis/ValueTracking.h"
#include "llvm/CodeGen/MachineFunctionPass.h"
#include "llvm/CodeGen/MachineFunction.h"
#include "llvm/CodeGen/MachineLocation.h"
@ -206,7 +207,9 @@ public:
}
virtual void Apply(std::string &Field) {
Constant *C = CI->getOperand(I++);
Field = C->getStringValue();
// Fills in the string if it succeeds
if (!GetConstantStringInfo(C, Field))
Field.clear();
}
virtual void Apply(DebugInfoDesc *&Field) {
Constant *C = CI->getOperand(I++);