Author: Zahira Ammarguellat Date: 2021-11-08T08:35:19-05:00 New Revision: 438437cbb61a39ce27b3d6218ac426b8f8a0132e
URL: https://github.com/llvm/llvm-project/commit/438437cbb61a39ce27b3d6218ac426b8f8a0132e DIFF: https://github.com/llvm/llvm-project/commit/438437cbb61a39ce27b3d6218ac426b8f8a0132e.diff LOG: Making the code compliant to the documentation about Floating Point support default values for C/C++. FPP-MODEL=PRECISE enables FFP-CONTRACT FMA is enabled. Fix for https://bugs.llvm.org/show_bug.cgi?id=50222 Added: clang/test/CodeGen/ffp-model.c clang/test/Misc/ffp-contract.c Modified: clang/docs/ReleaseNotes.rst clang/docs/UsersManual.rst clang/lib/Driver/ToolChains/Clang.cpp clang/test/CodeGen/ffp-contract-option.c clang/test/CodeGen/ppc-emmintrin.c clang/test/CodeGen/ppc-xmmintrin.c clang/test/Driver/fp-model.c Removed: ################################################################################ diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst index ba15803e6f48..fe4b563a6d2c 100644 --- a/clang/docs/ReleaseNotes.rst +++ b/clang/docs/ReleaseNotes.rst @@ -202,6 +202,16 @@ Arm and AArch64 Support in Clang architecture features, but will enable certain optimizations specific to Cortex-A57 CPUs and enable the use of a more accurate scheduling model. + +Floating Point Support in Clang +------------------------------- +- The -ffp-model=precise now implies -ffp-contract=on rather than + -ffp-contract=fast, and the documentation of these features has been + clarified. Previously, the documentation claimed that -ffp-model=precise was + the default, but this was incorrect because the precise model implied + -ffp-contract=fast, whereas the default behavior is -ffp-contract=on. + -ffp-model=precise is now exactly the default mode of the compiler. + Internal API Changes -------------------- diff --git a/clang/docs/UsersManual.rst b/clang/docs/UsersManual.rst index 8c6922db6b37..406efb093d55 100644 --- a/clang/docs/UsersManual.rst +++ b/clang/docs/UsersManual.rst @@ -1260,8 +1260,49 @@ installed. Controlling Floating Point Behavior ----------------------------------- -Clang provides a number of ways to control floating point behavior. The options -are listed below. +Clang provides a number of ways to control floating point behavior, including +with command line options and source pragmas. This section +describes the various floating point semantic modes and the corresponding options. + +.. csv-table:: Floating Point Semantic Modes + :header: "Mode", "Values" + :widths: 15, 30, 30 + + "ffp-exception-behavior", "{ignore, strict, may_trap}", + "fenv_access", "{off, on}", "(none)" + "frounding-math", "{dynamic, tonearest, downward, upward, towardzero}" + "ffp-contract", "{on, off, fast, fast-honor-pragmas}" + "fdenormal-fp-math", "{IEEE, PreserveSign, PositiveZero}" + "fdenormal-fp-math-fp32", "{IEEE, PreserveSign, PositiveZero}" + "fmath-errno", "{on, off}" + "fhonor-nans", "{on, off}" + "fhonor-infinities", "{on, off}" + "fsigned-zeros", "{on, off}" + "freciprocal-math", "{on, off}" + "allow_approximate_fns", "{on, off}" + "fassociative-math", "{on, off}" + +This table describes the option settings that correspond to the three +floating point semantic models: precise (the default), strict, and fast. + + +.. csv-table:: Floating Point Models + :header: "Mode", "Precise", "Strict", "Fast" + :widths: 25, 15, 15, 15 + + "except_behavior", "ignore", "strict", "ignore" + "fenv_access", "off", "on", "off" + "rounding_mode", "tonearest", "dynamic", "tonearest" + "contract", "on", "off", "fast" + "denormal_fp_math", "IEEE", "IEEE", "PreserveSign" + "denormal_fp32_math", "IEEE","IEEE", "PreserveSign" + "support_math_errno", "on", "on", "off" + "no_honor_nans", "off", "off", "on" + "no_honor_infinities", "off", "off", "on" + "no_signed_zeros", "off", "off", "on" + "allow_reciprocal", "off", "off", "on" + "allow_approximate_fns", "off", "off", "on" + "allow_reassociation", "off", "off", "on" .. option:: -ffast-math @@ -1467,7 +1508,7 @@ Note that floating-point operations performed as part of constant initialization and ``fast``. Details: - * ``precise`` Disables optimizations that are not value-safe on floating-point data, although FP contraction (FMA) is enabled (``-ffp-contract=fast``). This is the default behavior. + * ``precise`` Disables optimizations that are not value-safe on floating-point data, although FP contraction (FMA) is enabled (``-ffp-contract=on``). This is the default behavior. * ``strict`` Enables ``-frounding-math`` and ``-ffp-exception-behavior=strict``, and disables contractions (FMA). All of the ``-ffast-math`` enablements are disabled. Enables ``STDC FENV_ACCESS``: by default ``FENV_ACCESS`` is disabled. This option setting behaves as though ``#pragma STDC FENV_ACESS ON`` appeared at the top of the source file. * ``fast`` Behaves identically to specifying both ``-ffast-math`` and ``ffp-contract=fast`` diff --git a/clang/lib/Driver/ToolChains/Clang.cpp b/clang/lib/Driver/ToolChains/Clang.cpp index dc20ae05ed41..f16933f2b49b 100644 --- a/clang/lib/Driver/ToolChains/Clang.cpp +++ b/clang/lib/Driver/ToolChains/Clang.cpp @@ -2666,10 +2666,14 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D, llvm::DenormalMode DenormalFPMath = DefaultDenormalFPMath; llvm::DenormalMode DenormalFP32Math = DefaultDenormalFP32Math; - StringRef FPContract = ""; + // CUDA and HIP don't rely on the frontend to pass an ffp-contract option. + // If one wasn't given by the user, don't pass it here. + StringRef FPContract; + if (!JA.isDeviceOffloading(Action::OFK_Cuda) && + !JA.isOffloading(Action::OFK_HIP)) + FPContract = "on"; bool StrictFPModel = false; - if (const Arg *A = Args.getLastArg(options::OPT_flimited_precision_EQ)) { CmdArgs.push_back("-mlimit-float-precision"); CmdArgs.push_back(A->getValue()); @@ -2691,7 +2695,7 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D, ReciprocalMath = false; SignedZeros = true; // -fno_fast_math restores default denormal and fpcontract handling - FPContract = ""; + FPContract = "on"; DenormalFPMath = llvm::DenormalMode::getIEEE(); // FIXME: The target may have picked a non-IEEE default mode here based on @@ -2711,12 +2715,10 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D, // ffp-model= is a Driver option, it is entirely rewritten into more // granular options before being passed into cc1. // Use the gcc option in the switch below. - if (!FPModel.empty() && !FPModel.equals(Val)) { + if (!FPModel.empty() && !FPModel.equals(Val)) D.Diag(clang::diag::warn_drv_overriding_flag_option) - << Args.MakeArgString("-ffp-model=" + FPModel) - << Args.MakeArgString("-ffp-model=" + Val); - FPContract = ""; - } + << Args.MakeArgString("-ffp-model=" + FPModel) + << Args.MakeArgString("-ffp-model=" + Val); if (Val.equals("fast")) { optID = options::OPT_ffast_math; FPModel = Val; @@ -2724,7 +2726,7 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D, } else if (Val.equals("precise")) { optID = options::OPT_ffp_contract; FPModel = Val; - FPContract = "fast"; + FPContract = "on"; PreciseFPModel = true; } else if (Val.equals("strict")) { StrictFPModel = true; @@ -2812,9 +2814,9 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D, case options::OPT_ffp_contract: { StringRef Val = A->getValue(); if (PreciseFPModel) { - // -ffp-model=precise enables ffp-contract=fast as a side effect - // the FPContract value has already been set to a string literal - // and the Val string isn't a pertinent value. + // -ffp-model=precise enables ffp-contract=on. + // -ffp-model=precise sets PreciseFPModel to on and Val to + // "precise". FPContract is set. ; } else if (Val.equals("fast") || Val.equals("on") || Val.equals("off")) FPContract = Val; @@ -2907,23 +2909,27 @@ static void RenderFloatingPointOptions(const ToolChain &TC, const Driver &D, AssociativeMath = false; ReciprocalMath = false; SignedZeros = true; - TrappingMath = false; - RoundingFPMath = false; // -fno_fast_math restores default denormal and fpcontract handling DenormalFPMath = DefaultDenormalFPMath; DenormalFP32Math = llvm::DenormalMode::getIEEE(); - FPContract = ""; + if (!JA.isDeviceOffloading(Action::OFK_Cuda) && + !JA.isOffloading(Action::OFK_HIP)) + if (FPContract == "fast") { + FPContract = "on"; + D.Diag(clang::diag::warn_drv_overriding_flag_option) + << "-ffp-contract=fast" + << "-ffp-contract=on"; + } break; } if (StrictFPModel) { // If -ffp-model=strict has been specified on command line but // subsequent options conflict then emit warning diagnostic. - if (HonorINFs && HonorNaNs && - !AssociativeMath && !ReciprocalMath && - SignedZeros && TrappingMath && RoundingFPMath && - (FPContract.equals("off") || FPContract.empty()) && - DenormalFPMath == llvm::DenormalMode::getIEEE() && - DenormalFP32Math == llvm::DenormalMode::getIEEE()) + if (HonorINFs && HonorNaNs && !AssociativeMath && !ReciprocalMath && + SignedZeros && TrappingMath && RoundingFPMath && + DenormalFPMath == llvm::DenormalMode::getIEEE() && + DenormalFP32Math == llvm::DenormalMode::getIEEE() && + FPContract.equals("off")) // OK: Current Arg doesn't conflict with -ffp-model=strict ; else { diff --git a/clang/test/CodeGen/ffp-contract-option.c b/clang/test/CodeGen/ffp-contract-option.c index 52b750795940..04d23d5f90b7 100644 --- a/clang/test/CodeGen/ffp-contract-option.c +++ b/clang/test/CodeGen/ffp-contract-option.c @@ -1,9 +1,126 @@ -// RUN: %clang_cc1 -O3 -ffp-contract=fast -triple=aarch64-apple-darwin -S -o - %s | FileCheck %s -// REQUIRES: aarch64-registered-target - -float fma_test1(float a, float b, float c) { -// CHECK: fmadd - float x = a * b; - float y = x + c; - return y; +// RUN: %clang_cc1 -triple=x86_64 %s -emit-llvm -o - \ +// RUN:| FileCheck --check-prefixes CHECK,CHECK-DEFAULT %s + +// RUN: %clang_cc1 -triple=x86_64 -ffp-contract=off %s -emit-llvm -o - \ +// RUN:| FileCheck --check-prefixes CHECK,CHECK-DEFAULT %s + +// RUN: %clang_cc1 -triple=x86_64 -ffp-contract=on %s -emit-llvm -o - \ +// RUN:| FileCheck --check-prefixes CHECK,CHECK-ON %s + +// RUN: %clang_cc1 -triple=x86_64 -ffp-contract=fast %s -emit-llvm -o - \ +// RUN:| FileCheck --check-prefixes CHECK,CHECK-CONTRACTFAST %s + +// RUN: %clang_cc1 -triple=x86_64 -ffast-math %s -emit-llvm -o - \ +// RUN:| FileCheck --check-prefixes CHECK,CHECK-CONTRACTOFF %s + +// RUN: %clang_cc1 -triple=x86_64 -ffast-math -ffp-contract=off %s -emit-llvm \ +// RUN: -o - | FileCheck --check-prefixes CHECK,CHECK-CONTRACTOFF %s + +// RUN: %clang_cc1 -triple=x86_64 -ffast-math -ffp-contract=on %s -emit-llvm \ +// RUN: -o - | FileCheck --check-prefixes CHECK,CHECK-ONFAST %s + +// RUN: %clang_cc1 -triple=x86_64 -ffast-math -ffp-contract=fast %s -emit-llvm \ +// RUN: -o - | FileCheck --check-prefixes CHECK,CHECK-FASTFAST %s + +// RUN: %clang_cc1 -triple=x86_64 -ffp-contract=fast -ffast-math %s \ +// RUN: -emit-llvm \ +// RUN: -o - | FileCheck --check-prefixes CHECK,CHECK-FASTFAST %s + +// RUN: %clang_cc1 -triple=x86_64 -ffp-contract=off -fmath-errno \ +// RUN: -fno-rounding-math %s -emit-llvm -o - \ +// RUN: -o - | FileCheck --check-prefixes CHECK,CHECK-NOFAST %s + +// RUN: %clang -S -emit-llvm -fno-fast-math -emit-llvm %s -o - \ +// RUN: | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FPC-ON + +// RUN: %clang -S -emit-llvm -ffp-contract=fast -fno-fast-math \ +// RUN: -emit-llvm %s -o - | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FPC-ON + +// RUN: %clang -S -emit-llvm -ffp-contract=on -fno-fast-math \ +// RUN: -emit-llvm %s -o - | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FPC-ON + +// RUN: %clang -S -emit-llvm -ffp-contract=off -fno-fast-math \ +// RUN: -emit-llvm %s -o - | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FPC-OFF + +// RUN: %clang -S -emit-llvm -ffp-model=fast -fno-fast-math \ +// RUN: -emit-llvm %s -o - | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FPC-ON + +// RUN: %clang -S -emit-llvm -ffp-model=precise -fno-fast-math \ +// RUN: -emit-llvm %s -o - | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FPC-ON + +// RUN: %clang -S -emit-llvm -ffp-model=strict -fno-fast-math \ +// RUN: -emit-llvm %s -o - | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FPSC-OFF + +// RUN: %clang -S -emit-llvm -ffast-math -fno-fast-math \ +// RUN: -emit-llvm %s -o - | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FPC-ON + +float mymuladd(float x, float y, float z) { + // CHECK: define {{.*}} float @mymuladd(float noundef %x, float noundef %y, float noundef %z) + return x * y + z; + // expected-warning{{overriding '-ffp-contract=fast' option with '-ffp-contract=on'}} + + // CHECK-FAST: load float, float* + // CHECK-DEFAULT: load float, float* + // CHECK-DEFAULT: fmul float + // CHECK-DEFAULT: load float, float* + // CHECK-DEFAULT: fadd float + + // CHECK-ON: load float, float* + // CHECK-ON: load float, float* + // CHECK-ON: load float, float* + // CHECK-ON: call float @llvm.fmuladd.f32(float {{.*}}, float {{.*}}, float {{.*}}) + + // CHECK-CONTRACTFAST: load float, float* + // CHECK-CONTRACTFAST: load float, float* + // CHECK-CONTRACTFAST: fmul contract float + // CHECK-CONTRACTFAST: load float, float* + // CHECK-CONTRACTFAST: fadd contract float + + // CHECK-CONTRACTOFF: load float, float* + // CHECK-CONTRACTOFF: load float, float* + // CHECK-CONTRACTOFF: fmul reassoc nnan ninf nsz arcp afn float + // CHECK-CONTRACTOFF: load float, float* + // CHECK-CONTRACTOFF: fadd reassoc nnan ninf nsz arcp afn float {{.*}}, {{.*}} + + // CHECK-ONFAST: load float, float* + // CHECK-ONFAST: load float, float* + // CHECK-ONFAST: load float, float* + // CHECK-ONFAST: call reassoc nnan ninf nsz arcp afn float @llvm.fmuladd.f32(float {{.*}}, float {{.*}}, float {{.*}}) + + // CHECK-FASTFAST: load float, float* + // CHECK-FASTFAST: load float, float* + // CHECK-FASTFAST: fmul fast float + // CHECK-FASTFAST: load float, float* + // CHECK-FASTFAST: fadd fast float {{.*}}, {{.*}} + + // CHECK-NOFAST: load float, float* + // CHECK-NOFAST: load float, float* + // CHECK-NOFAST: fmul float {{.*}}, {{.*}} + // CHECK-NOFAST: load float, float* + // CHECK-NOFAST: fadd float {{.*}}, {{.*}} + + // CHECK-FPC-ON: load float, float* + // CHECK-FPC-ON: load float, float* + // CHECK-FPC-ON: load float, float* + // CHECK-FPC-ON: call float @llvm.fmuladd.f32(float {{.*}}, float {{.*}}, float {{.*}}) + + // CHECK-FPC-OFF: load float, float* + // CHECK-FPC-OFF: load float, float* + // CHECK-FPC-OFF: [[MUL:%.*]] = fmul float + // CHECK-FPC-OFF: [[TMP2:%.*]] = load float, float* + // CHECK-FPC-OFF: [[RES:%.*]] = fadd float {{.*}}, {{.*}} + + // CHECK-FFPC-OFF: load float, float* + // CHECK-FFPC-OFF: load float, float* + // CHECK-FPSC-OFF: call float @llvm.experimental.constrained.fmul.f32(float {{.*}}, float {{.*}}, {{.*}}) + // CHECK-FPSC-OFF: load float, float* + // CHECK-FPSC-OFF: [[RES:%.*]] = call float @llvm.experimental.constrained.fadd.f32(float {{.*}}, float {{.*}}, {{.*}}) } diff --git a/clang/test/CodeGen/ffp-model.c b/clang/test/CodeGen/ffp-model.c new file mode 100644 index 000000000000..ee0eedb2718f --- /dev/null +++ b/clang/test/CodeGen/ffp-model.c @@ -0,0 +1,51 @@ +// RUN: %clang -S -emit-llvm -ffp-model=fast -emit-llvm %s -o - \ +// RUN: | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-FAST + +// RUN: %clang -S -emit-llvm -ffp-model=precise -emit-llvm %s -o - \ +// RUN: | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-PRECISE + +// RUN: %clang -S -emit-llvm -ffp-model=strict -emit-llvm %s -o - \ +// RUN: | FileCheck %s \ +// RUN: --check-prefixes=CHECK,CHECK-STRICT + +// RUN: %clang -S -emit-llvm -ffp-model=strict -ffast-math -emit-llvm \ +// RUN: %s -o - | FileCheck %s \ +// RUN: --check-prefixes CHECK,CHECK-STRICT-FAST + +// RUN: %clang -S -emit-llvm -ffp-model=precise -ffast-math -emit-llvm \ +// RUN: %s -o - | FileCheck %s \ +// RUN: --check-prefixes CHECK,CHECK-FAST1 + +float mymuladd(float x, float y, float z) { + // CHECK: define {{.*}} float @mymuladd(float noundef %x, float noundef %y, float noundef %z) + return x * y + z; + // CHECK-FAST: fmul fast float + + // CHECK-FAST: load float, float* + // CHECK-FAST: fadd fast float + + // CHECK-PRECISE: load float, float* + // CHECK-PRECISE: load float, float* + // CHECK-PRECISE: load float, float* + // CHECK-PRECISE: call float @llvm.fmuladd.f32(float {{.*}}, float {{.*}}, float {{.*}}) + + // CHECK-STRICT: load float, float* + // CHECK-STRICT: load float, float* + // CHECK-STRICT: call float @llvm.experimental.constrained.fmul.f32(float {{.*}}, float {{.*}}, {{.*}}) + // CHECK-STRICT: load float, float* + // CHECK-STRICT: call float @llvm.experimental.constrained.fadd.f32(float {{.*}}, float {{.*}}, {{.*}}) + + // CHECK-STRICT-FAST: load float, float* + // CHECK-STRICT-FAST: load float, float* + // CHECK-STRICT-FAST: call fast float @llvm.experimental.constrained.fmul.f32(float {{.*}}, float {{.*}}, {{.*}}) + // CHECK-STRICT-FAST: load float, float* + // CHECK-STRICT-FAST: call fast float @llvm.experimental.constrained.fadd.f32(float {{.*}}, float {{.*}}, {{.*}} + + // CHECK-FAST1: load float, float* + // CHECK-FAST1: load float, float* + // CHECK-FAST1: fmul fast float {{.*}}, {{.*}} + // CHECK-FAST1: load float, float* {{.*}} + // CHECK-FAST1: fadd fast float {{.*}}, {{.*}} +} diff --git a/clang/test/CodeGen/ppc-emmintrin.c b/clang/test/CodeGen/ppc-emmintrin.c index 03e91f06bb16..3342c180f640 100644 --- a/clang/test/CodeGen/ppc-emmintrin.c +++ b/clang/test/CodeGen/ppc-emmintrin.c @@ -2,9 +2,9 @@ // REQUIRES: powerpc-registered-target // RUN: %clang -S -emit-llvm -target powerpc64-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \ -// RUN: -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-BE +// RUN: -ffp-contract=off -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-BE // RUN: %clang -S -emit-llvm -target powerpc64le-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \ -// RUN: -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-LE +// RUN: -ffp-contract=off -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-LE // CHECK-BE-DAG: @_mm_movemask_pd.perm_mask = internal constant <4 x i32> <i32 -2139062144, i32 -2139062144, i32 -2139062144, i32 -2139078656>, align 16 // CHECK-BE-DAG: @_mm_shuffle_epi32.permute_selectors = internal constant [4 x i32] [i32 66051, i32 67438087, i32 134810123, i32 202182159], align 4 diff --git a/clang/test/CodeGen/ppc-xmmintrin.c b/clang/test/CodeGen/ppc-xmmintrin.c index 9706a4f729b8..e7caf345a271 100644 --- a/clang/test/CodeGen/ppc-xmmintrin.c +++ b/clang/test/CodeGen/ppc-xmmintrin.c @@ -2,11 +2,11 @@ // REQUIRES: powerpc-registered-target // RUN: %clang -S -emit-llvm -target powerpc64-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \ -// RUN: -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-BE +// RUN: -ffp-contract=off -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-BE // RUN: %clang -x c++ -fsyntax-only -target powerpc64-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \ // RUN: -fno-discard-value-names -mllvm -disable-llvm-optzns // RUN: %clang -S -emit-llvm -target powerpc64le-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \ -// RUN: -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-LE +// RUN: -ffp-contract=off -fno-discard-value-names -mllvm -disable-llvm-optzns -o - | llvm-cxxfilt -n | FileCheck %s --check-prefixes=CHECK,CHECK-LE // RUN: %clang -x c++ -fsyntax-only -target powerpc64le-unknown-linux-gnu -mcpu=pwr8 -ffreestanding -DNO_WARN_X86_INTRINSICS %s \ // RUN: -fno-discard-value-names -mllvm -disable-llvm-optzns diff --git a/clang/test/Driver/fp-model.c b/clang/test/Driver/fp-model.c index 5fa9d110dd83..0824b3e2c596 100644 --- a/clang/test/Driver/fp-model.c +++ b/clang/test/Driver/fp-model.c @@ -99,7 +99,7 @@ // RUN: %clang -### -nostdinc -ffp-model=precise -c %s 2>&1 \ // RUN: | FileCheck --check-prefix=CHECK-FPM-PRECISE %s // CHECK-FPM-PRECISE: "-cc1" -// CHECK-FPM-PRECISE: "-ffp-contract=fast" +// CHECK-FPM-PRECISE: "-ffp-contract=on" // CHECK-FPM-PRECISE: "-fno-rounding-math" // RUN: %clang -### -nostdinc -ffp-model=strict -c %s 2>&1 \ diff --git a/clang/test/Misc/ffp-contract.c b/clang/test/Misc/ffp-contract.c new file mode 100644 index 000000000000..0d26905d4ef2 --- /dev/null +++ b/clang/test/Misc/ffp-contract.c @@ -0,0 +1,10 @@ +// RUN: %clang_cc1 -O3 -ffp-contract=fast -triple=aarch64-apple-darwin \ +// RUN: -S -o - %s | FileCheck --check-prefix=CHECK-FMADD %s +// REQUIRES: aarch64-registered-target + +float fma_test1(float a, float b, float c) { + // CHECK-FMADD: fmadd + float x = a * b; + float y = x + c; + return y; +} _______________________________________________ cfe-commits mailing list cfe-commits@lists.llvm.org https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
