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Don't build constantexprs that could be folded

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@5801 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2003-04-17 19:24:48 +00:00
parent 27287de06b
commit d628f6a9a4
1 changed files with 10 additions and 0 deletions
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10
lib/VMCore/Constants.cpp
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@ -5,6 +5,7 @@
//===----------------------------------------------------------------------===//
#include "llvm/Constants.h"
#include "llvm/ConstantHandling.h"
#include "llvm/DerivedTypes.h"
#include "llvm/iMemory.h"
#include "llvm/SymbolTable.h"
@ -636,6 +637,9 @@ typedef pair<unsigned, vector<Constant*> > ExprMapKeyType;
static ValueMap<const ExprMapKeyType, ConstantExpr> ExprConstants;
Constant *ConstantExpr::getCast(Constant *C, const Type *Ty) {
if (Constant *FC = ConstantFoldCastInstruction(C, Ty))
return FC; // Fold a few common cases...
// Look up the constant in the table first to ensure uniqueness
vector<Constant*> argVec(1, C);
const ExprMapKeyType &Key = make_pair(Instruction::Cast, argVec);
@ -649,6 +653,10 @@ Constant *ConstantExpr::getCast(Constant *C, const Type *Ty) {
}
Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2) {
if (Constant *FC = ConstantFoldBinaryInstruction(Opcode, C1, C2))
return FC; // Fold a few common cases...
// Look up the constant in the table first to ensure uniqueness
vector<Constant*> argVec(1, C1); argVec.push_back(C2);
const ExprMapKeyType &Key = make_pair(Opcode, argVec);
@ -671,6 +679,8 @@ Constant *ConstantExpr::get(unsigned Opcode, Constant *C1, Constant *C2) {
Constant *ConstantExpr::getGetElementPtr(Constant *C,
const std::vector<Constant*> &IdxList){
if (Constant *FC = ConstantFoldGetElementPtr(C, IdxList))
return FC; // Fold a few common cases...
const Type *Ty = C->getType();
// Look up the constant in the table first to ensure uniqueness