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-rw-r--r--lib/VMCore/ConstantFold.cpp82
1 files changed, 56 insertions, 26 deletions
diff --git a/lib/VMCore/ConstantFold.cpp b/lib/VMCore/ConstantFold.cpp
index ad9a33f845..2589739d52 100644
--- a/lib/VMCore/ConstantFold.cpp
+++ b/lib/VMCore/ConstantFold.cpp
@@ -40,7 +40,9 @@ namespace {
virtual Constant *add(const Constant *V1, const Constant *V2) const = 0;
virtual Constant *sub(const Constant *V1, const Constant *V2) const = 0;
virtual Constant *mul(const Constant *V1, const Constant *V2) const = 0;
- virtual Constant *div(const Constant *V1, const Constant *V2) const = 0;
+ virtual Constant *udiv(const Constant *V1, const Constant *V2) const = 0;
+ virtual Constant *sdiv(const Constant *V1, const Constant *V2) const = 0;
+ virtual Constant *fdiv(const Constant *V1, const Constant *V2) const = 0;
virtual Constant *rem(const Constant *V1, const Constant *V2) const = 0;
virtual Constant *op_and(const Constant *V1, const Constant *V2) const = 0;
virtual Constant *op_or (const Constant *V1, const Constant *V2) const = 0;
@@ -106,8 +108,14 @@ class VISIBILITY_HIDDEN TemplateRules : public ConstRules {
virtual Constant *mul(const Constant *V1, const Constant *V2) const {
return SubClassName::Mul((const ArgType *)V1, (const ArgType *)V2);
}
- virtual Constant *div(const Constant *V1, const Constant *V2) const {
- return SubClassName::Div((const ArgType *)V1, (const ArgType *)V2);
+ virtual Constant *udiv(const Constant *V1, const Constant *V2) const {
+ return SubClassName::UDiv((const ArgType *)V1, (const ArgType *)V2);
+ }
+ virtual Constant *sdiv(const Constant *V1, const Constant *V2) const {
+ return SubClassName::SDiv((const ArgType *)V1, (const ArgType *)V2);
+ }
+ virtual Constant *fdiv(const Constant *V1, const Constant *V2) const {
+ return SubClassName::FDiv((const ArgType *)V1, (const ArgType *)V2);
}
virtual Constant *rem(const Constant *V1, const Constant *V2) const {
return SubClassName::Rem((const ArgType *)V1, (const ArgType *)V2);
@@ -178,16 +186,18 @@ class VISIBILITY_HIDDEN TemplateRules : public ConstRules {
// Default "noop" implementations
//===--------------------------------------------------------------------===//
- static Constant *Add(const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *Sub(const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *Mul(const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *Div(const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *Rem(const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *And(const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *Or (const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *Xor(const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *Shl(const ArgType *V1, const ArgType *V2) { return 0; }
- static Constant *Shr(const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *Add (const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *Sub (const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *Mul (const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *SDiv(const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *UDiv(const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *FDiv(const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *Rem (const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *And (const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *Or (const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *Xor (const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *Shl (const ArgType *V1, const ArgType *V2) { return 0; }
+ static Constant *Shr (const ArgType *V1, const ArgType *V2) { return 0; }
static Constant *LessThan(const ArgType *V1, const ArgType *V2) {
return 0;
}
@@ -373,8 +383,14 @@ struct VISIBILITY_HIDDEN ConstantPackedRules
static Constant *Mul(const ConstantPacked *V1, const ConstantPacked *V2) {
return EvalVectorOp(V1, V2, ConstantExpr::getMul);
}
- static Constant *Div(const ConstantPacked *V1, const ConstantPacked *V2) {
- return EvalVectorOp(V1, V2, ConstantExpr::getDiv);
+ static Constant *UDiv(const ConstantPacked *V1, const ConstantPacked *V2) {
+ return EvalVectorOp(V1, V2, ConstantExpr::getUDiv);
+ }
+ static Constant *SDiv(const ConstantPacked *V1, const ConstantPacked *V2) {
+ return EvalVectorOp(V1, V2, ConstantExpr::getSDiv);
+ }
+ static Constant *FDiv(const ConstantPacked *V1, const ConstantPacked *V2) {
+ return EvalVectorOp(V1, V2, ConstantExpr::getFDiv);
}
static Constant *Rem(const ConstantPacked *V1, const ConstantPacked *V2) {
return EvalVectorOp(V1, V2, ConstantExpr::getRem);
@@ -493,18 +509,25 @@ struct VISIBILITY_HIDDEN DirectIntRules
DEF_CAST(Double, ConstantFP , double)
#undef DEF_CAST
- static Constant *Div(const ConstantInt *V1, const ConstantInt *V2) {
- if (V2->isNullValue()) return 0;
+ static Constant *UDiv(const ConstantInt *V1, const ConstantInt *V2) {
+ if (V2->isNullValue())
+ return 0;
+ BuiltinType R = (BuiltinType)(V1->getZExtValue() / V2->getZExtValue());
+ return ConstantInt::get(*Ty, R);
+ }
+
+ static Constant *SDiv(const ConstantInt *V1, const ConstantInt *V2) {
+ if (V2->isNullValue())
+ return 0;
if (V2->isAllOnesValue() && // MIN_INT / -1
- (BuiltinType)V1->getZExtValue() == -(BuiltinType)V1->getZExtValue())
+ (BuiltinType)V1->getSExtValue() == -(BuiltinType)V1->getSExtValue())
return 0;
BuiltinType R =
- (BuiltinType)V1->getZExtValue() / (BuiltinType)V2->getZExtValue();
+ (BuiltinType)(V1->getSExtValue() / V2->getSExtValue());
return ConstantInt::get(*Ty, R);
}
- static Constant *Rem(const ConstantInt *V1,
- const ConstantInt *V2) {
+ static Constant *Rem(const ConstantInt *V1, const ConstantInt *V2) {
if (V2->isNullValue()) return 0; // X / 0
if (V2->isAllOnesValue() && // MIN_INT / -1
(BuiltinType)V1->getZExtValue() == -(BuiltinType)V1->getZExtValue())
@@ -615,7 +638,7 @@ struct VISIBILITY_HIDDEN DirectFPRules
(BuiltinType)V2->getValue());
return ConstantFP::get(*Ty, Result);
}
- static Constant *Div(const ConstantFP *V1, const ConstantFP *V2) {
+ static Constant *FDiv(const ConstantFP *V1, const ConstantFP *V2) {
BuiltinType inf = std::numeric_limits<BuiltinType>::infinity();
if (V2->isExactlyValue(0.0)) return ConstantFP::get(*Ty, inf);
if (V2->isExactlyValue(-0.0)) return ConstantFP::get(*Ty, -inf);
@@ -1224,7 +1247,9 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
case Instruction::Add: C = ConstRules::get(V1, V2).add(V1, V2); break;
case Instruction::Sub: C = ConstRules::get(V1, V2).sub(V1, V2); break;
case Instruction::Mul: C = ConstRules::get(V1, V2).mul(V1, V2); break;
- case Instruction::Div: C = ConstRules::get(V1, V2).div(V1, V2); break;
+ case Instruction::UDiv: C = ConstRules::get(V1, V2).udiv(V1, V2); break;
+ case Instruction::SDiv: C = ConstRules::get(V1, V2).sdiv(V1, V2); break;
+ case Instruction::FDiv: C = ConstRules::get(V1, V2).fdiv(V1, V2); break;
case Instruction::Rem: C = ConstRules::get(V1, V2).rem(V1, V2); break;
case Instruction::And: C = ConstRules::get(V1, V2).op_and(V1, V2); break;
case Instruction::Or: C = ConstRules::get(V1, V2).op_or (V1, V2); break;
@@ -1307,7 +1332,9 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
case Instruction::Mul:
case Instruction::And:
return Constant::getNullValue(V1->getType());
- case Instruction::Div:
+ case Instruction::UDiv:
+ case Instruction::SDiv:
+ case Instruction::FDiv:
case Instruction::Rem:
if (!isa<UndefValue>(V2)) // undef/X -> 0
return Constant::getNullValue(V1->getType());
@@ -1358,7 +1385,8 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
if (CI->getZExtValue() == 1)
return const_cast<Constant*>(V1); // X * 1 == X
break;
- case Instruction::Div:
+ case Instruction::UDiv:
+ case Instruction::SDiv:
if (const ConstantInt *CI = dyn_cast<ConstantInt>(V2))
if (CI->getZExtValue() == 1)
return const_cast<Constant*>(V1); // X / 1 == X
@@ -1419,7 +1447,9 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
case Instruction::Shl:
case Instruction::Shr:
case Instruction::Sub:
- case Instruction::Div:
+ case Instruction::SDiv:
+ case Instruction::UDiv:
+ case Instruction::FDiv:
case Instruction::Rem:
default: // These instructions cannot be flopped around.
break;
generated by cgit v1.2.3-18-g5258 (git 2.32.0) at 2025-05-01 03:13:00 +0000