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simplify some functions and make them work with vector

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compares, noticed by inspection.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@97795 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2010-03-05 07:47:57 +00:00
parent 893075f46e
commit d6f645ac09
1 changed files with 25 additions and 62 deletions
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87
lib/Transforms/InstCombine/InstCombineAndOrXor.cpp
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@ -138,33 +138,21 @@ static unsigned getFCmpCode(FCmpInst::Predicate CC, bool &isOrdered) {
/// new ICmp instruction. The sign is passed in to determine which kind
/// of predicate to use in the new icmp instruction.
static Value *getICmpValue(bool Sign, unsigned Code, Value *LHS, Value *RHS) {
CmpInst::Predicate Pred;
switch (Code) {
default: assert(0 && "Illegal ICmp code!");
case 0:
return ConstantInt::getFalse(LHS->getContext());
case 1:
if (Sign)
return new ICmpInst(ICmpInst::ICMP_SGT, LHS, RHS);
return new ICmpInst(ICmpInst::ICMP_UGT, LHS, RHS);
case 2:
return new ICmpInst(ICmpInst::ICMP_EQ, LHS, RHS);
case 3:
if (Sign)
return new ICmpInst(ICmpInst::ICMP_SGE, LHS, RHS);
return new ICmpInst(ICmpInst::ICMP_UGE, LHS, RHS);
case 4:
if (Sign)
return new ICmpInst(ICmpInst::ICMP_SLT, LHS, RHS);
return new ICmpInst(ICmpInst::ICMP_ULT, LHS, RHS);
case 5:
return new ICmpInst(ICmpInst::ICMP_NE, LHS, RHS);
case 6:
if (Sign)
return new ICmpInst(ICmpInst::ICMP_SLE, LHS, RHS);
return new ICmpInst(ICmpInst::ICMP_ULE, LHS, RHS);
case 7:
return ConstantInt::getTrue(LHS->getContext());
case 0: // False.
return ConstantInt::get(CmpInst::makeCmpResultType(LHS->getType()), 0);
case 1: Pred = Sign ? ICmpInst::ICMP_SGT : ICmpInst::ICMP_UGT; break;
case 2: Pred = ICmpInst::ICMP_EQ; break;
case 3: Pred = Sign ? ICmpInst::ICMP_SGE : ICmpInst::ICMP_UGE; break;
case 4: Pred = Sign ? ICmpInst::ICMP_SLT : ICmpInst::ICMP_ULT; break;
case 5: Pred = ICmpInst::ICMP_NE; break;
case 6: Pred = Sign ? ICmpInst::ICMP_SLE : ICmpInst::ICMP_ULE; break;
case 7: // True.
return ConstantInt::get(CmpInst::makeCmpResultType(LHS->getType()), 1);
}
return new ICmpInst(Pred, LHS, RHS);
}
/// getFCmpValue - This is the complement of getFCmpCode, which turns an
@ -172,45 +160,19 @@ static Value *getICmpValue(bool Sign, unsigned Code, Value *LHS, Value *RHS) {
/// in to determine which kind of predicate to use in the new fcmp instruction.
static Value *getFCmpValue(bool isordered, unsigned code,
Value *LHS, Value *RHS) {
CmpInst::Predicate Pred;
switch (code) {
default: llvm_unreachable("Illegal FCmp code!");
case 0:
if (isordered)
return new FCmpInst(FCmpInst::FCMP_ORD, LHS, RHS);
else
return new FCmpInst(FCmpInst::FCMP_UNO, LHS, RHS);
case 1:
if (isordered)
return new FCmpInst(FCmpInst::FCMP_OGT, LHS, RHS);
else
return new FCmpInst(FCmpInst::FCMP_UGT, LHS, RHS);
case 2:
if (isordered)
return new FCmpInst(FCmpInst::FCMP_OEQ, LHS, RHS);
else
return new FCmpInst(FCmpInst::FCMP_UEQ, LHS, RHS);
case 3:
if (isordered)
return new FCmpInst(FCmpInst::FCMP_OGE, LHS, RHS);
else
return new FCmpInst(FCmpInst::FCMP_UGE, LHS, RHS);
case 4:
if (isordered)
return new FCmpInst(FCmpInst::FCMP_OLT, LHS, RHS);
else
return new FCmpInst(FCmpInst::FCMP_ULT, LHS, RHS);
case 5:
if (isordered)
return new FCmpInst(FCmpInst::FCMP_ONE, LHS, RHS);
else
return new FCmpInst(FCmpInst::FCMP_UNE, LHS, RHS);
case 6:
if (isordered)
return new FCmpInst(FCmpInst::FCMP_OLE, LHS, RHS);
else
return new FCmpInst(FCmpInst::FCMP_ULE, LHS, RHS);
case 7: return ConstantInt::getTrue(LHS->getContext());
default: assert(0 && "Illegal FCmp code!");
case 0: Pred = isordered ? FCmpInst::FCMP_ORD : FCmpInst::FCMP_UNO; break;
case 1: Pred = isordered ? FCmpInst::FCMP_OGT : FCmpInst::FCMP_UGT; break;
case 2: Pred = isordered ? FCmpInst::FCMP_OEQ : FCmpInst::FCMP_UEQ; break;
case 3: Pred = isordered ? FCmpInst::FCMP_OGE : FCmpInst::FCMP_UGE; break;
case 4: Pred = isordered ? FCmpInst::FCMP_OLT : FCmpInst::FCMP_ULT; break;
case 5: Pred = isordered ? FCmpInst::FCMP_ONE : FCmpInst::FCMP_UNE; break;
case 6: Pred = isordered ? FCmpInst::FCMP_OLE : FCmpInst::FCMP_ULE; break;
case 7: return ConstantInt::getTrue(LHS->getContext());
}
return new FCmpInst(Pred, LHS, RHS);
}
/// PredicatesFoldable - Return true if both predicates match sign or if at
@ -1178,7 +1140,8 @@ static Instruction *MatchSelectFromAndOr(Value *A, Value *B,
return 0;
}
/// FoldOrOfICmps - Fold (icmp)|(icmp) if possible.
/// FoldOrOfICmps - Fold (icmp)|(icmp) and (cast (icmp))|(cast (icmp)) if
/// possible.
Instruction *InstCombiner::FoldOrOfICmps(Instruction &I,
ICmpInst *LHS, ICmpInst *RHS) {
ICmpInst::Predicate LHSCC = LHS->getPredicate(), RHSCC = RHS->getPredicate();