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For PR950:

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This patch removes the SetCC instructions and replaces them with the ICmp
and FCmp instructions. The SetCondInst instruction has been removed and
been replaced with ICmpInst and FCmpInst.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@32751 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Reid Spencer
2006-12-23 06:05:41 +00:00
parent add2bd7f59
commit e4d87aa2de
87 changed files with 8093 additions and 6620 deletions
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49
lib/Transforms/Utils/SimplifyCFG.cpp
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@@ -369,12 +369,8 @@ static bool DominatesMergePoint(Value *V, BasicBlock *BB,
case Instruction::Shl:
case Instruction::LShr:
case Instruction::AShr:
case Instruction::SetEQ:
case Instruction::SetNE:
case Instruction::SetLT:
case Instruction::SetGT:
case Instruction::SetLE:
case Instruction::SetGE:
case Instruction::ICmp:
case Instruction::FCmp:
break; // These are all cheap and non-trapping instructions.
}
@@ -390,12 +386,13 @@ static bool DominatesMergePoint(Value *V, BasicBlock *BB,
return true;
}
// GatherConstantSetEQs - Given a potentially 'or'd together collection of seteq
// instructions that compare a value against a constant, return the value being
// compared, and stick the constant into the Values vector.
// GatherConstantSetEQs - Given a potentially 'or'd together collection of
// icmp_eq instructions that compare a value against a constant, return the
// value being compared, and stick the constant into the Values vector.
static Value *GatherConstantSetEQs(Value *V, std::vector<ConstantInt*> &Values){
if (Instruction *Inst = dyn_cast<Instruction>(V))
if (Inst->getOpcode() == Instruction::SetEQ) {
if (Inst->getOpcode() == Instruction::ICmp &&
cast<ICmpInst>(Inst)->getPredicate() == ICmpInst::ICMP_EQ) {
if (ConstantInt *C = dyn_cast<ConstantInt>(Inst->getOperand(1))) {
Values.push_back(C);
return Inst->getOperand(0);
@@ -417,7 +414,8 @@ static Value *GatherConstantSetEQs(Value *V, std::vector<ConstantInt*> &Values){
// being compared, and stick the constant into the Values vector.
static Value *GatherConstantSetNEs(Value *V, std::vector<ConstantInt*> &Values){
if (Instruction *Inst = dyn_cast<Instruction>(V))
if (Inst->getOpcode() == Instruction::SetNE) {
if (Inst->getOpcode() == Instruction::ICmp &&
cast<ICmpInst>(Inst)->getPredicate() == ICmpInst::ICMP_NE) {
if (ConstantInt *C = dyn_cast<ConstantInt>(Inst->getOperand(1))) {
Values.push_back(C);
return Inst->getOperand(0);
@@ -503,11 +501,11 @@ static Value *isValueEqualityComparison(TerminatorInst *TI) {
}
if (BranchInst *BI = dyn_cast<BranchInst>(TI))
if (BI->isConditional() && BI->getCondition()->hasOneUse())
if (SetCondInst *SCI = dyn_cast<SetCondInst>(BI->getCondition()))
if ((SCI->getOpcode() == Instruction::SetEQ ||
SCI->getOpcode() == Instruction::SetNE) &&
isa<ConstantInt>(SCI->getOperand(1)))
return SCI->getOperand(0);
if (ICmpInst *ICI = dyn_cast<ICmpInst>(BI->getCondition()))
if ((ICI->getPredicate() == ICmpInst::ICMP_EQ ||
ICI->getPredicate() == ICmpInst::ICMP_NE) &&
isa<ConstantInt>(ICI->getOperand(1)))
return ICI->getOperand(0);
return 0;
}
@@ -525,11 +523,11 @@ GetValueEqualityComparisonCases(TerminatorInst *TI,
}
BranchInst *BI = cast<BranchInst>(TI);
SetCondInst *SCI = cast<SetCondInst>(BI->getCondition());
Cases.push_back(std::make_pair(cast<ConstantInt>(SCI->getOperand(1)),
BI->getSuccessor(SCI->getOpcode() ==
Instruction::SetNE)));
return BI->getSuccessor(SCI->getOpcode() == Instruction::SetEQ);
ICmpInst *ICI = cast<ICmpInst>(BI->getCondition());
Cases.push_back(std::make_pair(cast<ConstantInt>(ICI->getOperand(1)),
BI->getSuccessor(ICI->getPredicate() ==
ICmpInst::ICMP_NE)));
return BI->getSuccessor(ICI->getPredicate() == ICmpInst::ICMP_EQ);
}
@@ -847,8 +845,8 @@ static bool HoistThenElseCodeToIf(BranchInst *BI) {
BasicBlock *BB2 = BI->getSuccessor(1); // The false destination
Instruction *I1 = BB1->begin(), *I2 = BB2->begin();
if (I1->getOpcode() != I2->getOpcode() || !I1->isIdenticalTo(I2) ||
isa<PHINode>(I1) || isa<InvokeInst>(I1))
if (I1->getOpcode() != I2->getOpcode() || isa<PHINode>(I1) ||
isa<InvokeInst>(I1) || !I1->isIdenticalTo(I2))
return false;
// If we get here, we can hoist at least one instruction.
@@ -1443,8 +1441,9 @@ bool llvm::SimplifyCFG(BasicBlock *BB) {
// predecessor and use logical operations to pick the right destination.
BasicBlock *TrueDest = BI->getSuccessor(0);
BasicBlock *FalseDest = BI->getSuccessor(1);
if (BinaryOperator *Cond = dyn_cast<BinaryOperator>(BI->getCondition()))
if (Cond->getParent() == BB && &BB->front() == Cond &&
if (Instruction *Cond = dyn_cast<Instruction>(BI->getCondition()))
if ((isa<CmpInst>(Cond) || isa<BinaryOperator>(Cond)) &&
Cond->getParent() == BB && &BB->front() == Cond &&
Cond->getNext() == BI && Cond->hasOneUse() &&
TrueDest != BB && FalseDest != BB)
for (pred_iterator PI = pred_begin(BB), E = pred_end(BB); PI!=E; ++PI)