llvmorg-github-actions[bot] wrote:
<!--LLVM PR SUMMARY COMMENT--> @llvm/pr-subscribers-llvm-ir Author: Serge Pavlov (spavloff) <details> <summary>Changes</summary> Previously exception handling behavior was uses as an indicator of sNaN support. With introducing a special function attribute `signaling_nans` the checks for sNaN support must be changed to use the function attribute rather than the exception behavior. --- Patch is 47.27 KiB, truncated to 20.00 KiB below, full version: https://github.com/llvm/llvm-project/pull/199557.diff 7 Files Affected: - (modified) llvm/include/llvm/Analysis/SimplifyQuery.h (+8) - (modified) llvm/include/llvm/IR/FPEnv.h (-6) - (modified) llvm/lib/Analysis/InstructionSimplify.cpp (+23-15) - (modified) llvm/test/Transforms/InstSimplify/fdiv-strictfp.ll (+28) - (modified) llvm/test/Transforms/InstSimplify/floating-point-arithmetic-strictfp.ll (+28) - (modified) llvm/test/Transforms/InstSimplify/strictfp-fadd.ll (+119-14) - (modified) llvm/test/Transforms/InstSimplify/strictfp-fsub.ll (+230-22) ``````````diff diff --git a/llvm/include/llvm/Analysis/SimplifyQuery.h b/llvm/include/llvm/Analysis/SimplifyQuery.h index b81b1dae27471..9a605ea9ed3a4 100644 --- a/llvm/include/llvm/Analysis/SimplifyQuery.h +++ b/llvm/include/llvm/Analysis/SimplifyQuery.h @@ -126,6 +126,14 @@ struct SimplifyQuery { /// Otherwise always return false. LLVM_ABI bool isUndefValue(Value *V) const; + bool expectsSignalingNaNs() const { + if (CxtI) + if (const BasicBlock *BB = CxtI->getParent()) + if (const Function *F = BB->getParent()) + return F->hasFnAttribute(Attribute::SignalingNans); + return false; + } + SimplifyQuery getWithoutDomCondCache() const { SimplifyQuery Copy(*this); Copy.DC = nullptr; diff --git a/llvm/include/llvm/IR/FPEnv.h b/llvm/include/llvm/IR/FPEnv.h index 38395b15c8c09..a3b7d1c26972d 100644 --- a/llvm/include/llvm/IR/FPEnv.h +++ b/llvm/include/llvm/IR/FPEnv.h @@ -80,11 +80,5 @@ LLVM_ABI Intrinsic::ID getConstrainedIntrinsicID(const Instruction &Instr); inline bool canRoundingModeBe(RoundingMode RM, RoundingMode QRM) { return RM == QRM || RM == RoundingMode::Dynamic; } - -/// Returns true if the possibility of a signaling NaN can be safely -/// ignored. -inline bool canIgnoreSNaN(fp::ExceptionBehavior EB, FastMathFlags FMF) { - return (EB == fp::ebIgnore || FMF.noNaNs()); -} } #endif diff --git a/llvm/lib/Analysis/InstructionSimplify.cpp b/llvm/lib/Analysis/InstructionSimplify.cpp index 4780c18bec421..956b2447d53ed 100644 --- a/llvm/lib/Analysis/InstructionSimplify.cpp +++ b/llvm/lib/Analysis/InstructionSimplify.cpp @@ -94,6 +94,10 @@ static Constant *getFalse(Type *Ty) { return ConstantInt::getFalse(Ty); } /// with every element true. static Constant *getTrue(Type *Ty) { return ConstantInt::getTrue(Ty); } +inline bool canIgnoreSNaN(const SimplifyQuery &Q, FastMathFlags FMF) { + return !Q.expectsSignalingNaNs() || FMF.noNaNs(); +} + /// isSameCompare - Is V equivalent to the comparison "LHS Pred RHS"? static bool isSameCompare(Value *V, CmpPredicate Pred, Value *LHS, Value *RHS) { CmpInst *Cmp = dyn_cast<CmpInst>(V); @@ -5935,14 +5939,14 @@ simplifyFAddInst(Value *Op0, Value *Op1, FastMathFlags FMF, // not simplify to Op0: // fadd SNaN, -0.0 --> QNaN // fadd +0.0, -0.0 --> -0.0 (but only with round toward negative) - if (canIgnoreSNaN(ExBehavior, FMF) && + if (canIgnoreSNaN(Q, FMF) && (!canRoundingModeBe(Rounding, RoundingMode::TowardNegative) || FMF.noSignedZeros())) if (match(Op1, m_NegZeroFP())) return Op0; // fadd X, 0 ==> X, when we know X is not -0 - if (canIgnoreSNaN(ExBehavior, FMF)) + if (canIgnoreSNaN(Q, FMF)) if (match(Op1, m_PosZeroFP()) && (FMF.noSignedZeros() || cannotBeNegativeZero(Op0, Q))) return Op0; @@ -5997,14 +6001,14 @@ simplifyFSubInst(Value *Op0, Value *Op1, FastMathFlags FMF, return C; // fsub X, +0 ==> X - if (canIgnoreSNaN(ExBehavior, FMF) && + if (canIgnoreSNaN(Q, FMF) && (!canRoundingModeBe(Rounding, RoundingMode::TowardNegative) || FMF.noSignedZeros())) if (match(Op1, m_PosZeroFP())) return Op0; // fsub X, -0 ==> X, when we know X is not -0 - if (canIgnoreSNaN(ExBehavior, FMF)) + if (canIgnoreSNaN(Q, FMF)) if (match(Op1, m_NegZeroFP()) && (FMF.noSignedZeros() || cannotBeNegativeZero(Op0, Q))) return Op0; @@ -6012,13 +6016,13 @@ simplifyFSubInst(Value *Op0, Value *Op1, FastMathFlags FMF, // fsub -0.0, (fsub -0.0, X) ==> X // fsub -0.0, (fneg X) ==> X Value *X; - if (canIgnoreSNaN(ExBehavior, FMF)) + if (canIgnoreSNaN(Q, FMF)) if (match(Op0, m_NegZeroFP()) && match(Op1, m_FNeg(m_Value(X)))) return X; // fsub 0.0, (fsub 0.0, X) ==> X if signed zeros are ignored. // fsub 0.0, (fneg X) ==> X if signed zeros are ignored. - if (canIgnoreSNaN(ExBehavior, FMF)) + if (canIgnoreSNaN(Q, FMF)) if (FMF.noSignedZeros() && match(Op0, m_AnyZeroFP()) && (match(Op1, m_FSub(m_AnyZeroFP(), m_Value(X))) || match(Op1, m_FNeg(m_Value(X))))) @@ -6058,16 +6062,18 @@ static Value *simplifyFMAFMul(Value *Op0, Value *Op1, FastMathFlags FMF, if (Constant *C = simplifyFPOp({Op0, Op1}, FMF, Q, ExBehavior, Rounding)) return C; - if (!isDefaultFPEnvironment(ExBehavior, Rounding)) - return nullptr; - // Canonicalize special constants as operand 1. if (match(Op0, m_FPOne()) || match(Op0, m_AnyZeroFP())) std::swap(Op0, Op1); // X * 1.0 --> X - if (match(Op1, m_FPOne())) - return Op0; + // except: SNaN * 1.0 -> QNaN + if (canIgnoreSNaN(Q, FMF)) + if (match(Op1, m_FPOne())) + return Op0; + + if (!isDefaultFPEnvironment(ExBehavior, Rounding)) + return nullptr; if (match(Op1, m_AnyZeroFP())) { // X * 0.0 --> 0.0 (with nnan and nsz) @@ -6158,13 +6164,15 @@ simplifyFDivInst(Value *Op0, Value *Op1, FastMathFlags FMF, if (Constant *C = simplifyFPOp({Op0, Op1}, FMF, Q, ExBehavior, Rounding)) return C; + // X / 1.0 -> X + // except: SNaN / 1.0 -> QNaN + if (canIgnoreSNaN(Q, FMF)) + if (match(Op1, m_FPOne())) + return Op0; + if (!isDefaultFPEnvironment(ExBehavior, Rounding)) return nullptr; - // X / 1.0 -> X - if (match(Op1, m_FPOne())) - return Op0; - // 0 / X -> 0 // Requires that NaNs are off (X could be zero) and signed zeroes are // ignored (X could be positive or negative, so the output sign is unknown). diff --git a/llvm/test/Transforms/InstSimplify/fdiv-strictfp.ll b/llvm/test/Transforms/InstSimplify/fdiv-strictfp.ll index a0fd8fe74bc67..de753adce84c2 100644 --- a/llvm/test/Transforms/InstSimplify/fdiv-strictfp.ll +++ b/llvm/test/Transforms/InstSimplify/fdiv-strictfp.ll @@ -84,6 +84,33 @@ define <2 x float> @fmul_fdiv_common_operand_commute_vec(<2 x float> %x, <2 x fl ret <2 x float> %d } +define float @fmul_fdiv_unity(float %x) #0 { +; CHECK-LABEL: @fmul_fdiv_unity( +; CHECK-NEXT: ret float [[X:%.*]] +; + %fdiv = call float @llvm.experimental.constrained.fdiv.f32(float %x, float 1.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") + ret float %fdiv +} + +define float @fmul_fdiv_unity_signaling(float %x) #1 { +; CHECK-LABEL: @fmul_fdiv_unity_signaling( +; CHECK-NEXT: [[FDIV:%.*]] = call float @llvm.experimental.constrained.fdiv.f32(float [[X:%.*]], float 1.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.ignore") +; CHECK-NEXT: ret float [[FDIV]] +; + %fdiv = call float @llvm.experimental.constrained.fdiv.f32(float %x, float 1.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") + ret float %fdiv +} + +define float @fmul_fdiv_unity_signaling_nnan(float %x) #1 { +; CHECK-LABEL: @fmul_fdiv_unity_signaling_nnan( +; CHECK-NEXT: ret float [[X:%.*]] +; + %fdiv = call nnan float @llvm.experimental.constrained.fdiv.f32(float %x, float 1.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") + ret float %fdiv +} + + + declare double @llvm.experimental.constrained.fmul.f64(double, double, metadata, metadata) #0 declare <2 x float> @llvm.experimental.constrained.fmul.v2f32(<2 x float>, <2 x float>, metadata, metadata) #0 @@ -94,4 +121,5 @@ declare <2 x float> @llvm.experimental.constrained.fdiv.v2f32(<2 x float>, <2 x declare float @llvm.experimental.constrained.frem.f32(float, float, metadata, metadata) #0 attributes #0 = { strictfp } +attributes #1 = { signaling_nans strictfp } diff --git a/llvm/test/Transforms/InstSimplify/floating-point-arithmetic-strictfp.ll b/llvm/test/Transforms/InstSimplify/floating-point-arithmetic-strictfp.ll index 9a078a8f569da..e8082906dfce4 100644 --- a/llvm/test/Transforms/InstSimplify/floating-point-arithmetic-strictfp.ll +++ b/llvm/test/Transforms/InstSimplify/floating-point-arithmetic-strictfp.ll @@ -514,6 +514,33 @@ define float @maxnum_with_pos_one_op(float %a) #0 { ret float %fabs } +define float @fmul_unity(float %x) #0 { +; CHECK-LABEL: @fmul_unity( +; CHECK-NEXT: [[FMUL:%.*]] = call float @llvm.experimental.constrained.fmul.f32(float [[X:%.*]], float 1.000000e+00, metadata !"round.dynamic", metadata !"fpexcept.strict") +; CHECK-NEXT: ret float [[X]] +; + %fmul = call float @llvm.experimental.constrained.fmul.f32(float %x, float 1.0, metadata !"round.dynamic", metadata !"fpexcept.strict") + ret float %fmul +} + +define float @fmul_unity_signaling(float %x) #1 { +; CHECK-LABEL: @fmul_unity_signaling( +; CHECK-NEXT: [[FMUL:%.*]] = call float @llvm.experimental.constrained.fmul.f32(float [[X:%.*]], float 1.000000e+00, metadata !"round.dynamic", metadata !"fpexcept.strict") +; CHECK-NEXT: ret float [[FMUL]] +; + %fmul = call float @llvm.experimental.constrained.fmul.f32(float %x, float 1.0, metadata !"round.dynamic", metadata !"fpexcept.strict") + ret float %fmul +} + +define float @fmul_unity_signaling_nnan(float %x) #1 { +; CHECK-LABEL: @fmul_unity_signaling_nnan( +; CHECK-NEXT: [[FMUL:%.*]] = call nnan float @llvm.experimental.constrained.fmul.f32(float [[X:%.*]], float 1.000000e+00, metadata !"round.dynamic", metadata !"fpexcept.strict") +; CHECK-NEXT: ret float [[X]] +; + %fmul = call nnan float @llvm.experimental.constrained.fmul.f32(float %x, float 1.0, metadata !"round.dynamic", metadata !"fpexcept.strict") + ret float %fmul +} + declare float @llvm.fabs.f32(float) declare <2 x float> @llvm.fabs.v2f32(<2 x float>) @@ -532,3 +559,4 @@ declare float @llvm.experimental.constrained.maxnum.f32(float, float, metadata) declare float @llvm.experimental.constrained.sqrt.f32(float, metadata, metadata) attributes #0 = { strictfp } +attributes #1 = { signaling_nans strictfp } diff --git a/llvm/test/Transforms/InstSimplify/strictfp-fadd.ll b/llvm/test/Transforms/InstSimplify/strictfp-fadd.ll index bfc7c038322d4..2c3299eb12599 100644 --- a/llvm/test/Transforms/InstSimplify/strictfp-fadd.ll +++ b/llvm/test/Transforms/InstSimplify/strictfp-fadd.ll @@ -17,6 +17,15 @@ define float @fadd_x_n0_defaultenv(float %a) #0 { ret float %ret } +define float @fadd_x_n0_defaultenv_signaling(float %a) #1 { +; CHECK-LABEL: @fadd_x_n0_defaultenv_signaling( +; CHECK-NEXT: [[A:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[A1:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0:[0-9]+]] +; CHECK-NEXT: ret float [[A]] +; + %ret = call float @llvm.experimental.constrained.fadd.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0 + ret float %ret +} + define <2 x float> @fadd_vec_x_n0_defaultenv(<2 x float> %a) #0 { ; CHECK-LABEL: @fadd_vec_x_n0_defaultenv( ; CHECK-NEXT: ret <2 x float> [[A:%.*]] @@ -25,10 +34,18 @@ define <2 x float> @fadd_vec_x_n0_defaultenv(<2 x float> %a) #0 { ret <2 x float> %ret } +define <2 x float> @fadd_vec_x_n0_defaultenv_signaling(<2 x float> %a) #1 { +; CHECK-LABEL: @fadd_vec_x_n0_defaultenv_signaling( +; CHECK-NEXT: [[A:%.*]] = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[A1:%.*]], <2 x float> splat (float -0.000000e+00), metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]] +; CHECK-NEXT: ret <2 x float> [[A]] +; + %ret = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %a, <2 x float><float -0.0, float -0.0>, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0 + ret <2 x float> %ret +} + define float @fadd_x_n0_ebmaytrap(float %a) #0 { ; CHECK-LABEL: @fadd_x_n0_ebmaytrap( -; CHECK-NEXT: [[RET:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[A:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0:[0-9]+]] -; CHECK-NEXT: ret float [[RET]] +; CHECK-NEXT: ret float [[RET:%.*]] ; %ret = call float @llvm.experimental.constrained.fadd.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0 ret float %ret @@ -36,8 +53,7 @@ define float @fadd_x_n0_ebmaytrap(float %a) #0 { define <2 x float> @fadd_vec_x_n0_ebmaytrap(<2 x float> %a) #0 { ; CHECK-LABEL: @fadd_vec_x_n0_ebmaytrap( -; CHECK-NEXT: [[RET:%.*]] = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[A:%.*]], <2 x float> splat (float -0.000000e+00), metadata !"round.tonearest", metadata !"fpexcept.maytrap") #[[ATTR0]] -; CHECK-NEXT: ret <2 x float> [[RET]] +; CHECK-NEXT: ret <2 x float> [[RET:%.*]] ; %ret = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %a, <2 x float><float -0.0, float -0.0>, metadata !"round.tonearest", metadata !"fpexcept.maytrap") #0 ret <2 x float> %ret @@ -45,7 +61,7 @@ define <2 x float> @fadd_vec_x_n0_ebmaytrap(<2 x float> %a) #0 { define float @fadd_x_n0_ebstrict(float %a) #0 { ; CHECK-LABEL: @fadd_x_n0_ebstrict( -; CHECK-NEXT: [[RET:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[A:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]] +; CHECK-NEXT: [[RET1:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[RET:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]] ; CHECK-NEXT: ret float [[RET]] ; %ret = call float @llvm.experimental.constrained.fadd.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0 @@ -54,7 +70,7 @@ define float @fadd_x_n0_ebstrict(float %a) #0 { define <2 x float> @fadd_vec_x_n0_ebstrict(<2 x float> %a) #0 { ; CHECK-LABEL: @fadd_vec_x_n0_ebstrict( -; CHECK-NEXT: [[RET:%.*]] = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[A:%.*]], <2 x float> splat (float -0.000000e+00), metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]] +; CHECK-NEXT: [[RET1:%.*]] = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[RET:%.*]], <2 x float> splat (float -0.000000e+00), metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]] ; CHECK-NEXT: ret <2 x float> [[RET]] ; %ret = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %a, <2 x float><float -0.0, float -0.0>, metadata !"round.tonearest", metadata !"fpexcept.strict") #0 @@ -107,6 +123,15 @@ define float @fadd_x_n0_towardzero(float %a) #0 { ret float %ret } +define float @fadd_x_n0_towardzero_signaling(float %a) #1 { +; CHECK-LABEL: @fadd_x_n0_towardzero_signaling( +; CHECK-NEXT: [[A:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float [[A1:%.*]], float -0.000000e+00, metadata !"round.towardzero", metadata !"fpexcept.ignore") #[[ATTR0]] +; CHECK-NEXT: ret float [[A]] +; + %ret = call float @llvm.experimental.constrained.fadd.f32(float %a, float -0.0, metadata !"round.towardzero", metadata !"fpexcept.ignore") #0 + ret float %ret +} + ; The rounding mode here needs to not be { tonearest, downward, dynamic }. ; Test one of the remaining rounding modes and the rest will be fine. define <2 x float> @fadd_vec_x_n0_towardzero(<2 x float> %a) #0 { @@ -117,6 +142,15 @@ define <2 x float> @fadd_vec_x_n0_towardzero(<2 x float> %a) #0 { ret <2 x float> %ret } +define <2 x float> @fadd_vec_x_n0_towardzero_signaling(<2 x float> %a) #1 { +; CHECK-LABEL: @fadd_vec_x_n0_towardzero_signaling( +; CHECK-NEXT: [[A:%.*]] = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[A1:%.*]], <2 x float> splat (float -0.000000e+00), metadata !"round.towardzero", metadata !"fpexcept.ignore") #[[ATTR0]] +; CHECK-NEXT: ret <2 x float> [[A]] +; + %ret = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %a, <2 x float><float -0.0, float -0.0>, metadata !"round.towardzero", metadata !"fpexcept.ignore") #0 + ret <2 x float> %ret +} + define float @fadd_nnan_x_n0_ebmaytrap(float %a) #0 { ; CHECK-LABEL: @fadd_nnan_x_n0_ebmaytrap( ; CHECK-NEXT: ret float [[A:%.*]] @@ -154,7 +188,7 @@ define <2 x float> @fadd_vec_nnan_x_n0_ebstrict(<2 x float> %a) #0 { ; Test with a fast math flag set but that flag is not "nnan". define float @fadd_ninf_x_n0_ebstrict(float %a) #0 { ; CHECK-LABEL: @fadd_ninf_x_n0_ebstrict( -; CHECK-NEXT: [[RET:%.*]] = call ninf float @llvm.experimental.constrained.fadd.f32(float [[A:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]] +; CHECK-NEXT: [[RET1:%.*]] = call ninf float @llvm.experimental.constrained.fadd.f32(float [[RET:%.*]], float -0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]] ; CHECK-NEXT: ret float [[RET]] ; %ret = call ninf float @llvm.experimental.constrained.fadd.f32(float %a, float -0.0, metadata !"round.tonearest", metadata !"fpexcept.strict") #0 @@ -164,7 +198,7 @@ define float @fadd_ninf_x_n0_ebstrict(float %a) #0 { ; Test with a fast math flag set but that flag is not "nnan". define <2 x float> @fadd_vec_ninf_x_n0_ebstrict(<2 x float> %a) #0 { ; CHECK-LABEL: @fadd_vec_ninf_x_n0_ebstrict( -; CHECK-NEXT: [[RET:%.*]] = call ninf <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[A:%.*]], <2 x float> splat (float -0.000000e+00), metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]] +; CHECK-NEXT: [[RET1:%.*]] = call ninf <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[RET:%.*]], <2 x float> splat (float -0.000000e+00), metadata !"round.tonearest", metadata !"fpexcept.strict") #[[ATTR0]] ; CHECK-NEXT: ret <2 x float> [[RET]] ; %ret = call ninf <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> %a, <2 x float><float -0.0, float -0.0>, metadata !"round.tonearest", metadata !"fpexcept.strict") #0 @@ -179,6 +213,15 @@ define float @fadd_n0_x_defaultenv(float %a) #0 { ret float %ret } +define float @fadd_n0_x_defaultenv_signaling(float %a) #1 { +; CHECK-LABEL: @fadd_n0_x_defaultenv_signaling( +; CHECK-NEXT: [[A:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float -0.000000e+00, float [[A1:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]] +; CHECK-NEXT: ret float [[A]] +; + %ret = call float @llvm.experimental.constrained.fadd.f32(float -0.0, float %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0 + ret float %ret +} + define <2 x float> @fadd_vec_n0_x_defaultenv(<2 x float> %a) #0 { ; CHECK-LABEL: @fadd_vec_n0_x_defaultenv( ; CHECK-NEXT: ret <2 x float> [[A:%.*]] @@ -187,6 +230,15 @@ define <2 x float> @fadd_vec_n0_x_defaultenv(<2 x float> %a) #0 { ret <2 x float> %ret } +define <2 x float> @fadd_vec_n0_x_defaultenv_signaling(<2 x float> %a) #1 { +; CHECK-LABEL: @fadd_vec_n0_x_defaultenv_signaling( +; CHECK-NEXT: [[A:%.*]] = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> splat (float -0.000000e+00), <2 x float> [[A1:%.*]], metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]] +; CHECK-NEXT: ret <2 x float> [[A]] +; + %ret = call <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float><float -0.0, float -0.0>, <2 x float> %a, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0 + ret <2 x float> %ret +} + ; TODO: Canonicalize the order of the arguments. Then this will fire. define float @fadd_n0_x_ebmaytrap(float %a) #0 { ; CHECK-LABEL: @fadd_n0_x_ebmaytrap( @@ -219,6 +271,15 @@ define float @fold_fadd_nsz_x_0_defaultenv(float %a) #0 { ret float %add } +define float @fold_fadd_nsz_x_0_defaultenv_signaling(float %a) #1 { +; CHECK-LABEL: @fold_fadd_nsz_x_0_defaultenv_signaling( +; CHECK-NEXT: [[A:%.*]] = call nsz float @llvm.experimental.constrained.fadd.f32(float [[A1:%.*]], float 0.000000e+00, metadata !"round.tonearest", metadata !"fpexcept.ignore") #[[ATTR0]] +; CHECK-NEXT: ret float [[A]] +; + %add = call nsz float @llvm.experimental.constrained.fadd.f32(float %a, float 0.0, metadata !"round.tonearest", metadata !"fpexcept.ignore") #0 + ret float %add +} + define <2 x float> @fold_fadd_vec_nsz_x_0_defaultenv(<2 x float> %a) #0 { ; CHECK-LABEL: @fold_fadd_vec_nsz_x_0_defaultenv( ; CHECK-NEXT: ret <2 x float> [[A:%.*]] @@ -227,6 +288,15 @@ define <2 x float> @fold_fadd_vec_nsz_x_0_defaultenv(<2 x float> %a) #0 { ret <2 x float> %add } +define <2 x float> @fold_fadd_vec_nsz_x_0_defaultenv_signaling(<2 x float> %a) #1 { +; CHECK-LABEL: @fold_fadd_vec_nsz_x_0_defaultenv_signaling( +; CHECK-NEXT: [[A:%.*]] = call nsz <2 x float> @llvm.experimental.constrained.fadd.v2f32(<2 x float> [[A1:%.*]], <2 x float> zeroinitializ... [truncated] `````````` </details> https://github.com/llvm/llvm-project/pull/199557 _______________________________________________ llvm-branch-commits mailing list [email protected] https://lists.llvm.org/cgi-bin/mailman/listinfo/llvm-branch-commits
