mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-10-19 11:02:59 +02:00
Make special cases (0 inf nan) work for frem.
Besides APFloat, this involved removing code from two places that thought they knew the result of frem(0., x) but were wrong. llvm-svn: 62645
This commit is contained in:
Dale Johannesen
parent
10ad717dc8
commit
6854f86296
@ -293,6 +293,7 @@ namespace llvm {
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opStatus addOrSubtractSpecials(const APFloat &, bool subtract);
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opStatus divideSpecials(const APFloat &);
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opStatus multiplySpecials(const APFloat &);
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opStatus modSpecials(const APFloat &);
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/* Miscellany. */
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void makeNaN(void);
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@ -1405,6 +1405,42 @@ APFloat::divideSpecials(const APFloat &rhs)
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}
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}
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APFloat::opStatus
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APFloat::modSpecials(const APFloat &rhs)
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{
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switch(convolve(category, rhs.category)) {
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default:
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assert(0);
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case convolve(fcNaN, fcZero):
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case convolve(fcNaN, fcNormal):
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case convolve(fcNaN, fcInfinity):
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case convolve(fcNaN, fcNaN):
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case convolve(fcZero, fcInfinity):
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case convolve(fcZero, fcNormal):
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case convolve(fcNormal, fcInfinity):
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return opOK;
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case convolve(fcZero, fcNaN):
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case convolve(fcNormal, fcNaN):
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case convolve(fcInfinity, fcNaN):
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category = fcNaN;
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copySignificand(rhs);
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return opOK;
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case convolve(fcNormal, fcZero):
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case convolve(fcInfinity, fcZero):
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case convolve(fcInfinity, fcNormal):
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case convolve(fcInfinity, fcInfinity):
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case convolve(fcZero, fcZero):
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makeNaN();
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return opInvalidOp;
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case convolve(fcNormal, fcNormal):
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return opOK;
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}
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}
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/* Change sign. */
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void
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APFloat::changeSign()
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@ -1557,10 +1593,13 @@ APFloat::opStatus
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APFloat::mod(const APFloat &rhs, roundingMode rounding_mode)
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{
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opStatus fs;
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assertArithmeticOK(*semantics);
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fs = modSpecials(rhs);
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if (category == fcNormal && rhs.category == fcNormal) {
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APFloat V = *this;
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unsigned int origSign = sign;
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assertArithmeticOK(*semantics);
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fs = V.divide(rhs, rmNearestTiesToEven);
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if (fs == opDivByZero)
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return fs;
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@ -1586,6 +1625,7 @@ APFloat::mod(const APFloat &rhs, roundingMode rounding_mode)
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if (isZero())
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sign = origSign; // IEEE754 requires this
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delete[] x;
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}
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return fs;
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}
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@ -2954,11 +2954,6 @@ Instruction *InstCombiner::visitFDiv(BinaryOperator &I) {
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Instruction *InstCombiner::commonRemTransforms(BinaryOperator &I) {
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Value *Op0 = I.getOperand(0), *Op1 = I.getOperand(1);
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// 0 % X == 0 for integer, we don't need to preserve faults!
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if (Constant *LHS = dyn_cast<Constant>(Op0))
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if (LHS->isNullValue())
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return ReplaceInstUsesWith(I, Constant::getNullValue(I.getType()));
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if (isa<UndefValue>(Op0)) { // undef % X -> 0
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if (I.getType()->isFPOrFPVector())
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return ReplaceInstUsesWith(I, Op0); // X % undef -> undef (could be SNaN)
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@ -2984,6 +2979,11 @@ Instruction *InstCombiner::commonIRemTransforms(BinaryOperator &I) {
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if (Instruction *common = commonRemTransforms(I))
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return common;
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// 0 % X == 0 for integer, we don't need to preserve faults!
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if (Constant *LHS = dyn_cast<Constant>(Op0))
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if (LHS->isNullValue())
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return ReplaceInstUsesWith(I, Constant::getNullValue(I.getType()));
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if (ConstantInt *RHS = dyn_cast<ConstantInt>(Op1)) {
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// X % 0 == undef, we don't need to preserve faults!
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if (RHS->equalsInt(0))
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@ -802,16 +802,6 @@ Constant *llvm::ConstantFoldBinaryInstruction(unsigned Opcode,
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(void)C3V.divide(C2V, APFloat::rmNearestTiesToEven);
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return ConstantFP::get(C3V);
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case Instruction::FRem:
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if (C2V.isZero()) {
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// IEEE 754, Section 7.1, #5
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if (CFP1->getType() == Type::DoubleTy)
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return ConstantFP::get(APFloat(std::numeric_limits<double>::
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quiet_NaN()));
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if (CFP1->getType() == Type::FloatTy)
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return ConstantFP::get(APFloat(std::numeric_limits<float>::
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quiet_NaN()));
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break;
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}
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(void)C3V.mod(C2V, APFloat::rmNearestTiesToEven);
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return ConstantFP::get(C3V);
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}
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@ -0,0 +1,315 @@
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; RUN: llvm-as < %s | opt -simplifycfg -instcombine | llvm-dis | grep 0x7FF8000000000000 | count 7
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; RUN: llvm-as < %s | opt -simplifycfg -instcombine | llvm-dis | grep 0x7FF80000FFFFFFFF | count 5
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; RUN: llvm-as < %s | opt -simplifycfg -instcombine | llvm-dis | grep {0\\.0} | count 3
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; RUN: llvm-as < %s | opt -simplifycfg -instcombine | llvm-dis | grep {3\\.5} | count 1
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; ModuleID = 'apf.c'
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target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
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target triple = "i386-apple-darwin9.6"
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@"\01LC" = internal constant [4 x i8] c"%f\0A\00" ; <[4 x i8]*> [#uses=1]
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define void @foo1() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0x7FF0000000000000, float* %x, align 4
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store float 0x7FF8000000000000, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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declare i32 @printf(i8*, ...) nounwind
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define void @foo2() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0x7FF0000000000000, float* %x, align 4
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store float 0.000000e+00, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo3() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0x7FF0000000000000, float* %x, align 4
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store float 3.500000e+00, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo4() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0x7FF0000000000000, float* %x, align 4
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store float 0x7FF0000000000000, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo5() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0x7FF8000000000000, float* %x, align 4
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store float 0x7FF0000000000000, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo6() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0x7FF8000000000000, float* %x, align 4
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store float 0.000000e+00, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo7() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0x7FF8000000000000, float* %x, align 4
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store float 3.500000e+00, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo8() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0x7FF8000000000000, float* %x, align 4
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store float 0x7FF8000000000000, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo9() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0.000000e+00, float* %x, align 4
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store float 0x7FF8000000000000, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo10() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0.000000e+00, float* %x, align 4
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store float 0x7FF0000000000000, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo11() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0.000000e+00, float* %x, align 4
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store float 0.000000e+00, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo12() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 0.000000e+00, float* %x, align 4
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store float 3.500000e+00, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
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%3 = fpext float %2 to double ; <double> [#uses=1]
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%4 = frem double %3, %1 ; <double> [#uses=1]
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%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
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br label %return
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return: ; preds = %entry
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ret void
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}
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define void @foo13() nounwind {
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entry:
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%y = alloca float ; <float*> [#uses=2]
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%x = alloca float ; <float*> [#uses=2]
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%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
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store float 3.500000e+00, float* %x, align 4
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store float 0x7FF8000000000000, float* %y, align 4
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%0 = load float* %y, align 4 ; <float> [#uses=1]
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%1 = fpext float %0 to double ; <double> [#uses=1]
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%2 = load float* %x, align 4 ; <float> [#uses=1]
|
||||
%3 = fpext float %2 to double ; <double> [#uses=1]
|
||||
%4 = frem double %3, %1 ; <double> [#uses=1]
|
||||
%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
|
||||
br label %return
|
||||
|
||||
return: ; preds = %entry
|
||||
ret void
|
||||
}
|
||||
|
||||
define void @foo14() nounwind {
|
||||
entry:
|
||||
%y = alloca float ; <float*> [#uses=2]
|
||||
%x = alloca float ; <float*> [#uses=2]
|
||||
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
|
||||
store float 3.500000e+00, float* %x, align 4
|
||||
store float 0x7FF0000000000000, float* %y, align 4
|
||||
%0 = load float* %y, align 4 ; <float> [#uses=1]
|
||||
%1 = fpext float %0 to double ; <double> [#uses=1]
|
||||
%2 = load float* %x, align 4 ; <float> [#uses=1]
|
||||
%3 = fpext float %2 to double ; <double> [#uses=1]
|
||||
%4 = frem double %3, %1 ; <double> [#uses=1]
|
||||
%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
|
||||
br label %return
|
||||
|
||||
return: ; preds = %entry
|
||||
ret void
|
||||
}
|
||||
|
||||
define void @foo15() nounwind {
|
||||
entry:
|
||||
%y = alloca float ; <float*> [#uses=2]
|
||||
%x = alloca float ; <float*> [#uses=2]
|
||||
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
|
||||
store float 3.500000e+00, float* %x, align 4
|
||||
store float 0.000000e+00, float* %y, align 4
|
||||
%0 = load float* %y, align 4 ; <float> [#uses=1]
|
||||
%1 = fpext float %0 to double ; <double> [#uses=1]
|
||||
%2 = load float* %x, align 4 ; <float> [#uses=1]
|
||||
%3 = fpext float %2 to double ; <double> [#uses=1]
|
||||
%4 = frem double %3, %1 ; <double> [#uses=1]
|
||||
%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
|
||||
br label %return
|
||||
|
||||
return: ; preds = %entry
|
||||
ret void
|
||||
}
|
||||
|
||||
define void @foo16() nounwind {
|
||||
entry:
|
||||
%y = alloca float ; <float*> [#uses=2]
|
||||
%x = alloca float ; <float*> [#uses=2]
|
||||
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
|
||||
store float 3.500000e+00, float* %x, align 4
|
||||
store float 3.500000e+00, float* %y, align 4
|
||||
%0 = load float* %y, align 4 ; <float> [#uses=1]
|
||||
%1 = fpext float %0 to double ; <double> [#uses=1]
|
||||
%2 = load float* %x, align 4 ; <float> [#uses=1]
|
||||
%3 = fpext float %2 to double ; <double> [#uses=1]
|
||||
%4 = frem double %3, %1 ; <double> [#uses=1]
|
||||
%5 = call i32 (i8*, ...)* @printf(i8* getelementptr ([4 x i8]* @"\01LC", i32 0, i32 0), double %4) nounwind ; <i32> [#uses=0]
|
||||
br label %return
|
||||
|
||||
return: ; preds = %entry
|
||||
ret void
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user