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- Make Value::replaceAllUsesWith work with constants correctly. This fixes

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bug FuncResolve/2002-08-19-ResolveGlobalVars.ll and gzip looks better.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@4103 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2002-10-09 23:12:59 +00:00
parent c251f9e0ae
commit 28eca8bb56
1 changed files with 18 additions and 16 deletions
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34
lib/VMCore/Value.cpp
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@ -7,6 +7,7 @@
#include "llvm/InstrTypes.h"
#include "llvm/SymbolTable.h"
#include "llvm/DerivedTypes.h"
#include "llvm/Constant.h"
#include "Support/LeakDetector.h"
#include <algorithm>
@ -45,23 +46,23 @@ Value::~Value() {
LeakDetector::removeGarbageObject(this);
}
void Value::replaceAllUsesWith(Value *D) {
assert(D && "Value::replaceAllUsesWith(<null>) is invalid!");
assert(D != this && "V->replaceAllUsesWith(V) is NOT valid!");
assert(D->getType() == getType() &&
void Value::replaceAllUsesWith(Value *New) {
assert(New && "Value::replaceAllUsesWith(<null>) is invalid!");
assert(New != this && "this->replaceAllUsesWith(this) is NOT valid!");
assert(New->getType() == getType() &&
"replaceAllUses of value with new value of different type!");
while (!Uses.empty()) {
User *Use = Uses.back();
#ifndef NDEBUG
unsigned NumUses = Uses.size();
#endif
Use->replaceUsesOfWith(this, D);
#ifndef NDEBUG // only in -g mode...
if (Uses.size() == NumUses)
std::cerr << "Use: " << *Use << "replace with: " << *D;
#endif
assert(Uses.size() != NumUses && "Didn't remove definition!");
// Must handle Constants specially, we cannot call replaceUsesOfWith on a
// constant!
if (Constant *C = dyn_cast<Constant>(Use)) {
C->replaceUsesOfWithOnConstant(this, New);
} else {
Use->replaceUsesOfWith(this, New);
}
}
}
@ -105,6 +106,9 @@ User::User(const Type *Ty, ValueTy vty, const std::string &name)
void User::replaceUsesOfWith(Value *From, Value *To) {
if (From == To) return; // Duh what?
assert(!isa<Constant>(this) &&
"Cannot call User::replaceUsesofWith on a constant!");
for (unsigned i = 0, E = getNumOperands(); i != E; ++i)
if (getOperand(i) == From) { // Is This operand is pointing to oldval?
// The side effects of this setOperand call include linking to
@ -113,5 +117,3 @@ void User::replaceUsesOfWith(Value *From, Value *To) {
setOperand(i, To); // Fix it now...
}
}