forked from OSchip/llvm-project
[Fixed Point Arithmetic] Refactor fixed point casts
Summary: - Added names for some emitted values (such as "tobool" for the result of a cast to boolean). - Replaced explicit IRBuilder request for doing sext/zext/trunc by using CreateIntCast instead. - Simplify code for emitting satuation into one if-statement for clamping to max, and one if-statement for clamping to min. Reviewers: leonardchan, ebevhan Reviewed By: leonardchan Subscribers: cfe-commits Differential Revision: https://reviews.llvm.org/D53707 llvm-svn: 345398
This commit is contained in:
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@ -1029,7 +1029,7 @@ Value *ScalarExprEmitter::EmitScalarConversion(Value *Src, QualType SrcType,
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// We do not need to check the padding bit on unsigned types if unsigned
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// padding is enabled because overflow into this bit is undefined
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// behavior.
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return Builder.CreateIsNotNull(Src);
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return Builder.CreateIsNotNull(Src, "tobool");
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}
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llvm_unreachable(
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@ -1247,79 +1247,62 @@ Value *ScalarExprEmitter::EmitFixedPointConversion(Value *Src, QualType SrcTy,
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unsigned DstWidth = DstFPSema.getWidth();
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unsigned SrcScale = SrcFPSema.getScale();
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unsigned DstScale = DstFPSema.getScale();
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bool IsSigned = SrcFPSema.isSigned();
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bool SrcIsSigned = SrcFPSema.isSigned();
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bool DstIsSigned = DstFPSema.isSigned();
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llvm::Type *DstIntTy = Builder.getIntNTy(DstWidth);
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Value *Result = Src;
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unsigned ResultWidth = SrcWidth;
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if (!DstFPSema.isSaturated()) {
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// Downscale
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if (DstScale < SrcScale) {
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if (IsSigned)
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Result = Builder.CreateAShr(Result, SrcScale - DstScale);
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else
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Result = Builder.CreateLShr(Result, SrcScale - DstScale);
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}
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// Downscale.
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if (DstScale < SrcScale)
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Result = SrcIsSigned ?
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Builder.CreateAShr(Result, SrcScale - DstScale, "downscale") :
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Builder.CreateLShr(Result, SrcScale - DstScale, "downscale");
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// Resize
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llvm::Type *DstIntTy = Builder.getIntNTy(DstWidth);
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if (IsSigned)
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Result = Builder.CreateSExtOrTrunc(Result, DstIntTy);
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else
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Result = Builder.CreateZExtOrTrunc(Result, DstIntTy);
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// Resize.
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Result = Builder.CreateIntCast(Result, DstIntTy, SrcIsSigned, "resize");
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// Upscale
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// Upscale.
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if (DstScale > SrcScale)
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Result = Builder.CreateShl(Result, DstScale - SrcScale);
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Result = Builder.CreateShl(Result, DstScale - SrcScale, "upscale");
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} else {
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// Adjust the number of fractional bits.
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if (DstScale > SrcScale) {
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// Need to extend first before scaling up
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ResultWidth = SrcWidth + DstScale - SrcScale;
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llvm::Type *UpscaledTy = Builder.getIntNTy(ResultWidth);
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if (IsSigned)
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Result = Builder.CreateSExt(Result, UpscaledTy);
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else
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Result = Builder.CreateZExt(Result, UpscaledTy);
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Result = Builder.CreateShl(Result, DstScale - SrcScale);
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Result = Builder.CreateIntCast(Result, UpscaledTy, SrcIsSigned, "resize");
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Result = Builder.CreateShl(Result, DstScale - SrcScale, "upscale");
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} else if (DstScale < SrcScale) {
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if (IsSigned)
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Result = Builder.CreateAShr(Result, SrcScale - DstScale);
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else
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Result = Builder.CreateLShr(Result, SrcScale - DstScale);
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Result = SrcIsSigned ?
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Builder.CreateAShr(Result, SrcScale - DstScale, "downscale") :
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Builder.CreateLShr(Result, SrcScale - DstScale, "downscale");
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}
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if (DstFPSema.getIntegralBits() < SrcFPSema.getIntegralBits()) {
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auto Max = ConstantInt::get(
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// Handle saturation.
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bool LessIntBits = DstFPSema.getIntegralBits() < SrcFPSema.getIntegralBits();
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if (LessIntBits) {
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Value *Max = ConstantInt::get(
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CGF.getLLVMContext(),
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APFixedPoint::getMax(DstFPSema).getValue().extOrTrunc(ResultWidth));
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Value *TooHigh = IsSigned ? Builder.CreateICmpSGT(Result, Max)
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: Builder.CreateICmpUGT(Result, Max);
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Result = Builder.CreateSelect(TooHigh, Max, Result);
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if (IsSigned) {
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// Cannot overflow min to dest type is src is unsigned since all fixed
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// point types can cover the unsigned min of 0.
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auto Min = ConstantInt::get(
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CGF.getLLVMContext(),
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APFixedPoint::getMin(DstFPSema).getValue().extOrTrunc(ResultWidth));
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Value *TooLow = Builder.CreateICmpSLT(Result, Min);
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Result = Builder.CreateSelect(TooLow, Min, Result);
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}
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} else if (IsSigned && !DstFPSema.isSigned()) {
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llvm::Type *ResultTy = Builder.getIntNTy(ResultWidth);
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Value *Zero = ConstantInt::getNullValue(ResultTy);
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Value *LTZero = Builder.CreateICmpSLT(Result, Zero);
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Result = Builder.CreateSelect(LTZero, Zero, Result);
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Value *TooHigh = SrcIsSigned ? Builder.CreateICmpSGT(Result, Max)
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: Builder.CreateICmpUGT(Result, Max);
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Result = Builder.CreateSelect(TooHigh, Max, Result, "satmax");
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}
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// Cannot overflow min to dest type if src is unsigned since all fixed
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// point types can cover the unsigned min of 0.
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if (SrcIsSigned && (LessIntBits || !DstIsSigned)) {
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Value *Min = ConstantInt::get(
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CGF.getLLVMContext(),
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APFixedPoint::getMin(DstFPSema).getValue().extOrTrunc(ResultWidth));
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Value *TooLow = Builder.CreateICmpSLT(Result, Min);
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Result = Builder.CreateSelect(TooLow, Min, Result, "satmin");
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}
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// Final resizing to dst width
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llvm::Type *DstIntTy = Builder.getIntNTy(DstWidth);
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if (IsSigned)
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Result = Builder.CreateSExtOrTrunc(Result, DstIntTy);
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else
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Result = Builder.CreateZExtOrTrunc(Result, DstIntTy);
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// Resize the integer part to get the final destination size.
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Result = Builder.CreateIntCast(Result, DstIntTy, SrcIsSigned, "resize");
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}
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return Result;
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}
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@ -4,104 +4,104 @@
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void TestFixedPointCastSameType() {
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_Accum a = 2.5k;
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_Accum a2 = a;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a2, align 4
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a2 = (_Accum)a;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a2, align 4
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}
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void TestFixedPointCastDown() {
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long _Accum la = 2.5lk;
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_Accum a = la;
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// DEFAULT: [[LACCUM:%[0-9]+]] = load i64, i64* %la, align 8
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// DEFAULT-NEXT: [[ACCUM_AS_I64:%[0-9]+]] = ashr i64 [[LACCUM]], 16
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// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = trunc i64 [[ACCUM_AS_I64]] to i32
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// DEFAULT: [[LACCUM:%[0-9a-z]+]] = load i64, i64* %la, align 8
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// DEFAULT-NEXT: [[ACCUM_AS_I64:%[0-9a-z]+]] = ashr i64 [[LACCUM]], 16
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i64 [[ACCUM_AS_I64]] to i32
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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a = (_Accum)la;
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// DEFAULT: [[LACCUM:%[0-9]+]] = load i64, i64* %la, align 8
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// DEFAULT-NEXT: [[ACCUM_AS_I64:%[0-9]+]] = ashr i64 [[LACCUM]], 16
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// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = trunc i64 [[ACCUM_AS_I64]] to i32
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// DEFAULT: [[LACCUM:%[0-9a-z]+]] = load i64, i64* %la, align 8
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// DEFAULT-NEXT: [[ACCUM_AS_I64:%[0-9a-z]+]] = ashr i64 [[LACCUM]], 16
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i64 [[ACCUM_AS_I64]] to i32
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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short _Accum sa = a;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[SACCUM_AS_I32:%[0-9]+]] = ashr i32 [[ACCUM]], 8
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// DEFAULT-NEXT: [[SACCUM:%[0-9]+]] = trunc i32 [[SACCUM_AS_I32]] to i16
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[SACCUM_AS_I32:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8
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// DEFAULT-NEXT: [[SACCUM:%[0-9a-z]+]] = trunc i32 [[SACCUM_AS_I32]] to i16
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// DEFAULT-NEXT: store i16 [[SACCUM]], i16* %sa, align 2
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sa = (short _Accum)a;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[SACCUM_AS_I32:%[0-9]+]] = ashr i32 [[ACCUM]], 8
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// DEFAULT-NEXT: [[SACCUM:%[0-9]+]] = trunc i32 [[SACCUM_AS_I32]] to i16
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[SACCUM_AS_I32:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8
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// DEFAULT-NEXT: [[SACCUM:%[0-9a-z]+]] = trunc i32 [[SACCUM_AS_I32]] to i16
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// DEFAULT-NEXT: store i16 [[SACCUM]], i16* %sa, align 2
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}
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void TestFixedPointCastUp() {
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short _Accum sa = 2.5hk;
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_Accum a = sa;
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// DEFAULT: [[SACCUM:%[0-9]+]] = load i16, i16* %sa, align 2
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// DEFAULT-NEXT: [[SACCUM_BUFF:%[0-9]+]] = sext i16 [[SACCUM]] to i32
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// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = shl i32 [[SACCUM_BUFF]], 8
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// DEFAULT: [[SACCUM:%[0-9a-z]+]] = load i16, i16* %sa, align 2
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// DEFAULT-NEXT: [[SACCUM_BUFF:%[0-9a-z]+]] = sext i16 [[SACCUM]] to i32
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[SACCUM_BUFF]], 8
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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long _Accum la = a;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[ACCUM_BUFF:%[0-9]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9]+]] = shl i64 [[ACCUM_BUFF]], 16
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[ACCUM_BUFF:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_BUFF]], 16
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// DEFAULT-NEXT: store i64 [[LACCUM]], i64* %la, align 8
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a = (_Accum)sa;
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// DEFAULT: [[SACCUM:%[0-9]+]] = load i16, i16* %sa, align 2
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// DEFAULT-NEXT: [[SACCUM_BUFF:%[0-9]+]] = sext i16 [[SACCUM]] to i32
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// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = shl i32 [[SACCUM_BUFF]], 8
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// DEFAULT: [[SACCUM:%[0-9a-z]+]] = load i16, i16* %sa, align 2
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// DEFAULT-NEXT: [[SACCUM_BUFF:%[0-9a-z]+]] = sext i16 [[SACCUM]] to i32
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[SACCUM_BUFF]], 8
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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la = (long _Accum)a;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[ACCUM_BUFF:%[0-9]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9]+]] = shl i64 [[ACCUM_BUFF]], 16
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[ACCUM_BUFF:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_BUFF]], 16
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// DEFAULT-NEXT: store i64 [[LACCUM]], i64* %la, align 8
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}
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void TestFixedPointCastSignedness() {
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_Accum a = 2.5k;
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unsigned _Accum ua = a;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[UACCUM:%[0-9]+]] = shl i32 [[ACCUM]], 1
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[UACCUM:%[0-9a-z]+]] = shl i32 [[ACCUM]], 1
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// DEFAULT-NEXT: store i32 [[UACCUM]], i32* %ua, align 4
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// SAME: TestFixedPointCastSignedness
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// SAME: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// SAME-NEXT: store i32 [[ACCUM]], i32* %ua, align 4
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a = ua;
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// DEFAULT: [[UACCUM:%[0-9]+]] = load i32, i32* %ua, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = lshr i32 [[UACCUM]], 1
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// DEFAULT: [[UACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = lshr i32 [[UACCUM]], 1
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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// SAME: [[ACCUM:%[0-9]+]] = load i32, i32* %ua, align 4
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// SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4
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// SAME-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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ua = (unsigned _Accum)a;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[UACCUM:%[0-9]+]] = shl i32 [[ACCUM]], 1
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
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// DEFAULT-NEXT: [[UACCUM:%[0-9a-z]+]] = shl i32 [[ACCUM]], 1
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// DEFAULT-NEXT: store i32 [[UACCUM]], i32* %ua, align 4
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a = (_Accum)ua;
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// DEFAULT: [[UACCUM:%[0-9]+]] = load i32, i32* %ua, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = lshr i32 [[UACCUM]], 1
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// DEFAULT: [[UACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = lshr i32 [[UACCUM]], 1
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// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
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_Accum a2;
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unsigned long _Accum ula = a2;
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// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a2, align 4
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// DEFAULT-NEXT: [[ACCUM_EXT:%[0-9]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9]+]] = shl i64 [[ACCUM_EXT]], 17
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// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a2, align 4
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// DEFAULT-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64
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// DEFAULT-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_EXT]], 17
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// DEFAULT-NEXT: store i64 [[LACCUM]], i64* %ula, align 8
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// SAME: [[ACCUM:%[0-9]+]] = load i32, i32* %a2, align 4
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// SAME-NEXT: [[ACCUM_EXT:%[0-9]+]] = sext i32 [[ACCUM]] to i64
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// SAME-NEXT: [[LACCUM:%[0-9]+]] = shl i64 [[ACCUM_EXT]], 16
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// SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a2, align 4
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// SAME-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[ACCUM]] to i64
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// SAME-NEXT: [[LACCUM:%[0-9a-z]+]] = shl i64 [[ACCUM_EXT]], 16
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// SAME-NEXT: store i64 [[LACCUM]], i64* %ula, align 8
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}
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@ -119,113 +119,113 @@ void TestFixedPointCastSaturation() {
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// Casting down between types
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sat_sa = sat_a;
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// DEFAULT: [[OLD_ACCUM:%[0-9]+]] = load i32, i32* %sat_a, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = ashr i32 [[OLD_ACCUM]], 8
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// DEFAULT-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i32 [[ACCUM]], 32767
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// DEFAULT-NEXT: [[RESULT:%[0-9]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
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// DEFAULT-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i32 [[RESULT]], -32768
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// DEFAULT-NEXT: [[RESULT2:%[0-9]+]] = select i1 [[USE_MIN]], i32 -32768, i32 [[RESULT]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9]+]] = trunc i32 [[RESULT2]] to i16
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// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
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// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8
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// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767
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// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
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// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -32768
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// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -32768, i32 [[RESULT]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16
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// DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_sa, align 2
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// Accum to Fract, decreasing scale
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sat_sf = sat_a;
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// DEFAULT: [[OLD_ACCUM:%[0-9]+]] = load i32, i32* %sat_a, align 4
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// DEFAULT-NEXT: [[FRACT:%[0-9]+]] = ashr i32 [[OLD_ACCUM]], 8
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// DEFAULT-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i32 [[FRACT]], 127
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// DEFAULT-NEXT: [[RESULT:%[0-9]+]] = select i1 [[USE_MAX]], i32 127, i32 [[FRACT]]
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// DEFAULT-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i32 [[RESULT]], -128
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// DEFAULT-NEXT: [[RESULT2:%[0-9]+]] = select i1 [[USE_MIN]], i32 -128, i32 [[RESULT]]
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// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9]+]] = trunc i32 [[RESULT2]] to i8
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// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
|
||||
// DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8
|
||||
// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[FRACT]], 127
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 127, i32 [[FRACT]]
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -128
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -128, i32 [[RESULT]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i8
|
||||
// DEFAULT-NEXT: store i8 [[RESULT_TRUNC]], i8* %sat_sf, align 1
|
||||
|
||||
// Accum to Fract, same scale
|
||||
sat_f = a;
|
||||
// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
|
||||
// DEFAULT-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i32 [[ACCUM]], 32767
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i32 [[RESULT]], -32768
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9]+]] = select i1 [[USE_MIN]], i32 -32768, i32 [[RESULT]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9]+]] = trunc i32 [[RESULT2]] to i16
|
||||
// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
|
||||
// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], -32768
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 -32768, i32 [[RESULT]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16
|
||||
// DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_f, align 2
|
||||
|
||||
// Accum to Fract, increasing scale
|
||||
sat_lf = sat_a;
|
||||
// DEFAULT: [[OLD_ACCUM:%[0-9]+]] = load i32, i32* %sat_a, align 4
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = sext i32 [[OLD_ACCUM]] to i48
|
||||
// DEFAULT-NEXT: [[FRACT:%[0-9]+]] = shl i48 [[ACCUM]], 16
|
||||
// DEFAULT-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i48 [[FRACT]], 2147483647
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9]+]] = select i1 [[USE_MAX]], i48 2147483647, i48 [[FRACT]]
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i48 [[RESULT]], -2147483648
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9]+]] = select i1 [[USE_MIN]], i48 -2147483648, i48 [[RESULT]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9]+]] = trunc i48 [[RESULT2]] to i32
|
||||
// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = sext i32 [[OLD_ACCUM]] to i48
|
||||
// DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = shl i48 [[ACCUM]], 16
|
||||
// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i48 [[FRACT]], 2147483647
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i48 2147483647, i48 [[FRACT]]
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i48 [[RESULT]], -2147483648
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i48 -2147483648, i48 [[RESULT]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i48 [[RESULT2]] to i32
|
||||
// DEFAULT-NEXT: store i32 [[RESULT_TRUNC]], i32* %sat_lf, align 4
|
||||
|
||||
// Signed to unsigned, decreasing scale
|
||||
_Sat _Accum sat_a2;
|
||||
sat_usa = sat_a2;
|
||||
// DEFAULT: [[OLD_ACCUM:%[0-9]+]] = load i32, i32* %sat_a2, align 4
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = ashr i32 [[OLD_ACCUM]], 7
|
||||
// DEFAULT-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i32 [[ACCUM]], 65535
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9]+]] = select i1 [[USE_MAX]], i32 65535, i32 [[ACCUM]]
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i32 [[RESULT]], 0
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9]+]] = select i1 [[USE_MIN]], i32 0, i32 [[RESULT]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9]+]] = trunc i32 [[RESULT2]] to i16
|
||||
// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a2, align 4
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 7
|
||||
// DEFAULT-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 65535
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 65535, i32 [[ACCUM]]
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], 0
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[RESULT]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16
|
||||
// DEFAULT-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_usa, align 2
|
||||
// SAME: [[OLD_ACCUM:%[0-9]+]] = load i32, i32* %sat_a2, align 4
|
||||
// SAME-NEXT: [[ACCUM:%[0-9]+]] = ashr i32 [[OLD_ACCUM]], 8
|
||||
// SAME-NEXT: [[USE_MAX:%[0-9]+]] = icmp sgt i32 [[ACCUM]], 32767
|
||||
// SAME-NEXT: [[RESULT:%[0-9]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
|
||||
// SAME-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i32 [[RESULT]], 0
|
||||
// SAME-NEXT: [[RESULT2:%[0-9]+]] = select i1 [[USE_MIN]], i32 0, i32 [[RESULT]]
|
||||
// SAME-NEXT: [[RESULT_TRUNC:%[0-9]+]] = trunc i32 [[RESULT2]] to i16
|
||||
// SAME: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a2, align 4
|
||||
// SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = ashr i32 [[OLD_ACCUM]], 8
|
||||
// SAME-NEXT: [[USE_MAX:%[0-9a-z]+]] = icmp sgt i32 [[ACCUM]], 32767
|
||||
// SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MAX]], i32 32767, i32 [[ACCUM]]
|
||||
// SAME-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[RESULT]], 0
|
||||
// SAME-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[RESULT]]
|
||||
// SAME-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i32 [[RESULT2]] to i16
|
||||
// SAME-NEXT: store i16 [[RESULT_TRUNC]], i16* %sat_usa, align 2
|
||||
|
||||
// Signed to unsigned, increasing scale
|
||||
sat_ua = sat_a;
|
||||
// DEFAULT: [[OLD_ACCUM:%[0-9]+]] = load i32, i32* %sat_a, align 4
|
||||
// DEFAULT-NEXT: [[ACCUM_EXT:%[0-9]+]] = sext i32 [[OLD_ACCUM]] to i33
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = shl i33 [[ACCUM_EXT]], 1
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i33 [[ACCUM]], 0
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9]+]] = select i1 [[USE_MIN]], i33 0, i33 [[ACCUM]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9]+]] = trunc i33 [[RESULT2]] to i32
|
||||
// DEFAULT: [[OLD_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
|
||||
// DEFAULT-NEXT: [[ACCUM_EXT:%[0-9a-z]+]] = sext i32 [[OLD_ACCUM]] to i33
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i33 [[ACCUM_EXT]], 1
|
||||
// DEFAULT-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i33 [[ACCUM]], 0
|
||||
// DEFAULT-NEXT: [[RESULT2:%[0-9a-z]+]] = select i1 [[USE_MIN]], i33 0, i33 [[ACCUM]]
|
||||
// DEFAULT-NEXT: [[RESULT_TRUNC:%[0-9a-z]+]] = trunc i33 [[RESULT2]] to i32
|
||||
// DEFAULT-NEXT: store i32 [[RESULT_TRUNC]], i32* %sat_ua, align 4
|
||||
// SAME: [[ACCUM:%[0-9]+]] = load i32, i32* %sat_a, align 4
|
||||
// SAME-NEXT: [[USE_MIN:%[0-9]+]] = icmp slt i32 [[ACCUM]], 0
|
||||
// SAME-NEXT: [[RESULT:%[0-9]+]] = select i1 [[USE_MIN]], i32 0, i32 [[ACCUM]]
|
||||
// SAME: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
|
||||
// SAME-NEXT: [[USE_MIN:%[0-9a-z]+]] = icmp slt i32 [[ACCUM]], 0
|
||||
// SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[USE_MIN]], i32 0, i32 [[ACCUM]]
|
||||
// SAME-NEXT: store i32 [[RESULT]], i32* %sat_ua, align 4
|
||||
|
||||
// Nothing when saturating to the same type and size
|
||||
sat_a = a;
|
||||
// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
|
||||
// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
|
||||
// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %sat_a, align 4
|
||||
|
||||
// Nothing when assigning back
|
||||
a = sat_a;
|
||||
// DEFAULT: [[SAT_ACCUM:%[0-9]+]] = load i32, i32* %sat_a, align 4
|
||||
// DEFAULT: [[SAT_ACCUM:%[0-9a-z]+]] = load i32, i32* %sat_a, align 4
|
||||
// DEFAULT-NEXT: store i32 [[SAT_ACCUM]], i32* %a, align 4
|
||||
|
||||
// No overflow when casting from fract to signed accum
|
||||
sat_a = sat_f;
|
||||
// DEFAULT: [[FRACT:%[0-9]+]] = load i16, i16* %sat_f, align 2
|
||||
// DEFAULT-NEXT: [[FRACT_EXT:%[0-9]+]] = sext i16 [[FRACT]] to i32
|
||||
// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %sat_f, align 2
|
||||
// DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i16 [[FRACT]] to i32
|
||||
// DEFAULT-NEXT: store i32 [[FRACT_EXT]], i32* %sat_a, align 4
|
||||
|
||||
// Only get overflow checking if signed fract to unsigned accum
|
||||
sat_ua = sat_sf;
|
||||
// DEFAULT: [[FRACT:%[0-9]+]] = load i8, i8* %sat_sf, align 1
|
||||
// DEFAULT-NEXT: [[FRACT_EXT:%[0-9]+]] = sext i8 [[FRACT]] to i17
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = shl i17 [[FRACT_EXT]], 9
|
||||
// DEFAULT-NEXT: [[IS_NEG:%[0-9]+]] = icmp slt i17 [[ACCUM]], 0
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9]+]] = select i1 [[IS_NEG]], i17 0, i17 [[ACCUM]]
|
||||
// DEFAULT-NEXT: [[RESULT_EXT:%[0-9]+]] = sext i17 [[RESULT]] to i32
|
||||
// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sat_sf, align 1
|
||||
// DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i17
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i17 [[FRACT_EXT]], 9
|
||||
// DEFAULT-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i17 [[ACCUM]], 0
|
||||
// DEFAULT-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i17 0, i17 [[ACCUM]]
|
||||
// DEFAULT-NEXT: [[RESULT_EXT:%[0-9a-z]+]] = sext i17 [[RESULT]] to i32
|
||||
// DEFAULT-NEXT: store i32 [[RESULT_EXT]], i32* %sat_ua, align 4
|
||||
// SAME: [[FRACT:%[0-9]+]] = load i8, i8* %sat_sf, align 1
|
||||
// SAME-NEXT: [[FRACT_EXT:%[0-9]+]] = sext i8 [[FRACT]] to i16
|
||||
// SAME-NEXT: [[ACCUM:%[0-9]+]] = shl i16 [[FRACT_EXT]], 8
|
||||
// SAME-NEXT: [[IS_NEG:%[0-9]+]] = icmp slt i16 [[ACCUM]], 0
|
||||
// SAME-NEXT: [[RESULT:%[0-9]+]] = select i1 [[IS_NEG]], i16 0, i16 [[ACCUM]]
|
||||
// SAME-NEXT: [[RESULT_EXT:%[0-9]+]] = sext i16 [[RESULT]] to i32
|
||||
// SAME: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sat_sf, align 1
|
||||
// SAME-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i16
|
||||
// SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i16 [[FRACT_EXT]], 8
|
||||
// SAME-NEXT: [[IS_NEG:%[0-9a-z]+]] = icmp slt i16 [[ACCUM]], 0
|
||||
// SAME-NEXT: [[RESULT:%[0-9a-z]+]] = select i1 [[IS_NEG]], i16 0, i16 [[ACCUM]]
|
||||
// SAME-NEXT: [[RESULT_EXT:%[0-9a-z]+]] = sext i16 [[RESULT]] to i32
|
||||
// SAME-NEXT: store i32 [[RESULT_EXT]], i32* %sat_ua, align 4
|
||||
}
|
||||
|
||||
|
@ -241,43 +241,43 @@ void TestFixedPointCastBetFractAccum() {
|
|||
|
||||
// To lower scale
|
||||
sf = a;
|
||||
// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
|
||||
// DEFAULT-NEXT: [[FRACT:%[0-9]+]] = ashr i32 [[ACCUM]], 8
|
||||
// DEFAULT-NEXT: [[FRACT_TRUNC:%[0-9]+]] = trunc i32 [[FRACT]] to i8
|
||||
// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
|
||||
// DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = ashr i32 [[ACCUM]], 8
|
||||
// DEFAULT-NEXT: [[FRACT_TRUNC:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i8
|
||||
// DEFAULT-NEXT: store i8 [[FRACT_TRUNC]], i8* %sf, align 1
|
||||
|
||||
// To higher scale
|
||||
a = sf;
|
||||
// DEFAULT: [[FRACT:%[0-9]+]] = load i8, i8* %sf, align 1
|
||||
// DEFAULT-NEXT: [[FRACT_EXT:%[0-9]+]] = sext i8 [[FRACT]] to i32
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = shl i32 [[FRACT_EXT]], 8
|
||||
// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i8, i8* %sf, align 1
|
||||
// DEFAULT-NEXT: [[FRACT_EXT:%[0-9a-z]+]] = sext i8 [[FRACT]] to i32
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = shl i32 [[FRACT_EXT]], 8
|
||||
// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
|
||||
|
||||
// To same scale
|
||||
f = a;
|
||||
// DEFAULT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
|
||||
// DEFAULT-NEXT: [[FRACT:%[0-9]+]] = trunc i32 [[ACCUM]] to i16
|
||||
// DEFAULT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
|
||||
// DEFAULT-NEXT: [[FRACT:%[0-9a-z]+]] = trunc i32 [[ACCUM]] to i16
|
||||
// DEFAULT-NEXT: store i16 [[FRACT]], i16* %f, align 2
|
||||
|
||||
a = f;
|
||||
// DEFAULT: [[FRACT:%[0-9]+]] = load i16, i16* %f, align 2
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = sext i16 [[FRACT]] to i32
|
||||
// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %f, align 2
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = sext i16 [[FRACT]] to i32
|
||||
// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %a, align 4
|
||||
|
||||
// To unsigned
|
||||
ua = uf;
|
||||
// DEFAULT: [[FRACT:%[0-9]+]] = load i16, i16* %uf, align 2
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = zext i16 [[FRACT]] to i32
|
||||
// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i16, i16* %uf, align 2
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = zext i16 [[FRACT]] to i32
|
||||
// DEFAULT-NEXT: store i32 [[ACCUM]], i32* %ua, align 4
|
||||
// SAME: [[FRACT:%[0-9]+]] = load i16, i16* %uf, align 2
|
||||
// SAME-NEXT: [[ACCUM:%[0-9]+]] = zext i16 [[FRACT]] to i32
|
||||
// SAME: [[FRACT:%[0-9a-z]+]] = load i16, i16* %uf, align 2
|
||||
// SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = zext i16 [[FRACT]] to i32
|
||||
// SAME-NEXT: store i32 [[ACCUM]], i32* %ua, align 4
|
||||
|
||||
uf = ua;
|
||||
// DEFAULT: [[FRACT:%[0-9]+]] = load i32, i32* %ua, align 4
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9]+]] = trunc i32 [[FRACT]] to i16
|
||||
// DEFAULT: [[FRACT:%[0-9a-z]+]] = load i32, i32* %ua, align 4
|
||||
// DEFAULT-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i16
|
||||
// DEFAULT-NEXT: store i16 [[ACCUM]], i16* %uf, align 2
|
||||
// SAME: [[FRACT:%[0-9]+]] = load i32, i32* %ua, align 4
|
||||
// SAME-NEXT: [[ACCUM:%[0-9]+]] = trunc i32 [[FRACT]] to i16
|
||||
// SAME: [[FRACT:%[0-9a-z]+]] = load i32, i32* %ua, align 4
|
||||
// SAME-NEXT: [[ACCUM:%[0-9a-z]+]] = trunc i32 [[FRACT]] to i16
|
||||
// SAME-NEXT: store i16 [[ACCUM]], i16* %uf, align 2
|
||||
}
|
||||
|
|
|
@ -27,26 +27,26 @@ void func() {
|
|||
b = (_Bool)0.5ur;
|
||||
b = (_Bool)0.0ur;
|
||||
|
||||
// CHECK-NEXT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
|
||||
// CHECK-NEXT: [[NOTZERO:%[0-9]+]] = icmp ne i32 [[ACCUM]], 0
|
||||
// CHECK-NEXT: %frombool = zext i1 [[NOTZERO]] to i8
|
||||
// CHECK-NEXT: store i8 %frombool, i8* %b, align 1
|
||||
// CHECK-NEXT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
|
||||
// CHECK-NEXT: [[NOTZERO:%[0-9a-z]+]] = icmp ne i32 [[ACCUM]], 0
|
||||
// CHECK-NEXT: [[FROMBOOL:%[0-9a-z]+]] = zext i1 [[NOTZERO]] to i8
|
||||
// CHECK-NEXT: store i8 [[FROMBOOL]], i8* %b, align 1
|
||||
b = a;
|
||||
|
||||
// CHECK-NEXT: [[ACCUM:%[0-9]+]] = load i32, i32* %ua, align 4
|
||||
// CHECK-NEXT: [[NOTZERO:%[0-9]+]] = icmp ne i32 [[ACCUM]], 0
|
||||
// CHECK-NEXT: %frombool1 = zext i1 [[NOTZERO]] to i8
|
||||
// CHECK-NEXT: store i8 %frombool1, i8* %b, align 1
|
||||
// CHECK-NEXT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4
|
||||
// CHECK-NEXT: [[NOTZERO:%[0-9a-z]+]] = icmp ne i32 [[ACCUM]], 0
|
||||
// CHECK-NEXT: [[FROMBOOL:%[0-9a-z]+]] = zext i1 [[NOTZERO]] to i8
|
||||
// CHECK-NEXT: store i8 [[FROMBOOL]], i8* %b, align 1
|
||||
b = ua;
|
||||
|
||||
// CHECK-NEXT: [[ACCUM:%[0-9]+]] = load i32, i32* %a, align 4
|
||||
// CHECK-NEXT: [[NOTZERO:%[0-9]+]] = icmp ne i32 [[ACCUM]], 0
|
||||
// CHECK-NEXT: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %a, align 4
|
||||
// CHECK-NEXT: [[NOTZERO:%[0-9a-z]+]] = icmp ne i32 [[ACCUM]], 0
|
||||
// CHECK-NEXT: br i1 [[NOTZERO]], label %if.then, label %if.end
|
||||
if (a) {
|
||||
}
|
||||
|
||||
// CHECK: [[ACCUM:%[0-9]+]] = load i32, i32* %ua, align 4
|
||||
// CHECK-NEXT: [[NOTZERO:%[0-9]+]] = icmp ne i32 [[ACCUM]], 0
|
||||
// CHECK: [[ACCUM:%[0-9a-z]+]] = load i32, i32* %ua, align 4
|
||||
// CHECK-NEXT: [[NOTZERO:%[0-9a-z]+]] = icmp ne i32 [[ACCUM]], 0
|
||||
// CHECK-NEXT: br i1 [[NOTZERO]], label %if.then{{[0-9]+}}, label %if.end{{[0-9]+}}
|
||||
if (ua) {
|
||||
}
|
||||
|
|
Loading…
Reference in New Issue