201 lines
10 KiB
C
201 lines
10 KiB
C
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// Test that the GCC fast-math floating point flags get lowered to the correct
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// permutation of Clang frontend flags. This is non-trivial for a few reasons.
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// First, the GCC flags have many different and surprising effects. Second,
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// LLVM only supports three switches which is more coarse grained than GCC's
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// support.
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//
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// Both of them use gcc driver for as.
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// REQUIRES: clang-driver
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//
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// RUN: %clang -### -fno-honor-infinities -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-INFS %s
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// CHECK-NO-INFS: "-cc1"
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// CHECK-NO-INFS: "-menable-no-infs"
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//
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// RUN: %clang -### -fno-fast-math -fno-honor-infinities -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-FAST-MATH-NO-INFS %s
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// CHECK-NO-FAST-MATH-NO-INFS: "-cc1"
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// CHECK-NO-FAST-MATH-NO-INFS: "-menable-no-infs"
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//
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// RUN: %clang -### -fno-honor-infinities -fno-fast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-INFS-NO-FAST-MATH %s
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// CHECK-NO-INFS-NO-FAST-MATH: "-cc1"
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// CHECK-NO-INFS-NO-FAST-MATH-NOT: "-menable-no-infs"
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//
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// RUN: %clang -### -fno-honor-nans -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NANS %s
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// CHECK-NO-NANS: "-cc1"
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// CHECK-NO-NANS: "-menable-no-nans"
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//
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// RUN: %clang -### -fno-fast-math -fno-honor-nans -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-FAST-MATH-NO-NANS %s
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// CHECK-NO-FAST-MATH-NO-NANS: "-cc1"
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// CHECK-NO-FAST-MATH-NO-NANS: "-menable-no-nans"
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//
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// RUN: %clang -### -fno-honor-nans -fno-fast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NANS-NO-FAST-MATH %s
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// CHECK-NO-NANS-NO-FAST-MATH: "-cc1"
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// CHECK-NO-NANS-NO-FAST-MATH-NOT: "-menable-no-nans"
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//
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// RUN: %clang -### -fmath-errno -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-MATH-ERRNO %s
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// CHECK-MATH-ERRNO: "-cc1"
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// CHECK-MATH-ERRNO: "-fmath-errno"
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//
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// RUN: %clang -### -fmath-errno -fno-math-errno -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// CHECK-NO-MATH-ERRNO: "-cc1"
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// CHECK-NO-MATH-ERRNO-NOT: "-fmath-errno"
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//
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// Target defaults for -fmath-errno (reusing the above checks).
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// RUN: %clang -### -target i686-unknown-linux -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-MATH-ERRNO %s
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// RUN: %clang -### -target i686-apple-darwin -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// RUN: %clang -### -target x86_64-unknown-freebsd -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// RUN: %clang -### -target x86_64-unknown-netbsd -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// RUN: %clang -### -target x86_64-unknown-openbsd -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// RUN: %clang -### -target x86_64-unknown-dragonfly -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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//
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// Check that -ffast-math disables -fmath-errno, and -fno-fast-math merely
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// preserves the target default. Also check various flag set operations between
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// the two flags. (Resuses above checks.)
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// RUN: %clang -### -ffast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// RUN: %clang -### -fmath-errno -ffast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// RUN: %clang -### -ffast-math -fmath-errno -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-MATH-ERRNO %s
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// RUN: %clang -### -target i686-unknown-linux -fno-fast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-MATH-ERRNO %s
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// RUN: %clang -### -target i686-unknown-linux -fno-math-errno -fno-fast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-MATH-ERRNO %s
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// RUN: %clang -### -target i686-apple-darwin -fno-fast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// RUN: %clang -### -target i686-apple-darwin -fno-math-errno -fno-fast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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// RUN: %clang -### -fno-fast-math -fno-math-errno -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-MATH-ERRNO %s
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//
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// RUN: %clang -### -fno-math-errno -fassociative-math -freciprocal-math \
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// RUN: -fno-signed-zeros -fno-trapping-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-UNSAFE-MATH %s
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// CHECK-UNSAFE-MATH: "-cc1"
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// CHECK-UNSAFE-MATH: "-menable-unsafe-fp-math"
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//
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// RUN: %clang -### -fno-fast-math -fno-math-errno -fassociative-math -freciprocal-math \
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// RUN: -fno-signed-zeros -fno-trapping-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-FAST-MATH-UNSAFE-MATH %s
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// CHECK-NO-FAST-MATH-UNSAFE-MATH: "-cc1"
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// CHECK-NO-FAST-MATH-UNSAFE-MATH: "-menable-unsafe-fp-math"
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//
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// RUN: %clang -### -fno-fast-math -fno-math-errno -fassociative-math -freciprocal-math \
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// RUN: -fno-fast-math -fno-signed-zeros -fno-trapping-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-UNSAFE-MATH-NO-FAST-MATH %s
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// CHECK-UNSAFE-MATH-NO-FAST-MATH: "-cc1"
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// CHECK-UNSAFE-MATH-NO-FAST-MATH-NOT: "-menable-unsafe-fp-math"
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//
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// Check that various umbrella flags also enable these frontend options.
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// RUN: %clang -### -ffast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-INFS %s
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// RUN: %clang -### -ffast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NANS %s
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// RUN: %clang -### -ffast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-UNSAFE-MATH %s
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// RUN: %clang -### -ffinite-math-only -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-INFS %s
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// RUN: %clang -### -ffinite-math-only -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NANS %s
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// RUN: %clang -### -funsafe-math-optimizations -fno-math-errno -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-UNSAFE-MATH %s
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//
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// One umbrella flag is *really* weird and also changes the semantics of the
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// program by adding a special preprocessor macro. Check that the frontend flag
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// modeling this semantic change is provided. Also check that the semantic
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// impact remains even if every optimization is disabled.
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// RUN: %clang -### -ffast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-FAST-MATH %s
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// RUN: %clang -### -fno-fast-math -ffast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-FAST-MATH %s
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// RUN: %clang -### -ffast-math -fno-finite-math-only \
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// RUN: -fno-unsafe-math-optimizations -fmath-errno -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-FAST-MATH %s
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// CHECK-FAST-MATH: "-cc1"
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// CHECK-FAST-MATH: "-ffast-math"
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//
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// RUN: %clang -### -ffast-math -fno-fast-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-FAST-MATH %s
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// CHECK-NO-FAST-MATH: "-cc1"
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// CHECK-NO-FAST-MATH-NOT: "-ffast-math"
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//
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// Check various means of disabling these flags, including disabling them after
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// they've been enabled via an umbrella flag.
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// RUN: %clang -### -fno-honor-infinities -fhonor-infinities -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-INFS %s
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// RUN: %clang -### -ffinite-math-only -fhonor-infinities -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-INFS %s
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// RUN: %clang -### -ffinite-math-only -fno-finite-math-only -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-INFS %s
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// RUN: %clang -### -ffast-math -fhonor-infinities -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-INFS %s
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// RUN: %clang -### -ffast-math -fno-finite-math-only -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-INFS %s
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// CHECK-NO-NO-INFS: "-cc1"
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// CHECK-NO-NO-INFS-NOT: "-menable-no-infs"
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// CHECK-NO-NO-INFS: "-o"
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//
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// RUN: %clang -### -fno-honor-nans -fhonor-nans -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-NANS %s
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// RUN: %clang -### -ffinite-math-only -fhonor-nans -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-NANS %s
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// RUN: %clang -### -ffinite-math-only -fno-finite-math-only -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-NANS %s
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// RUN: %clang -### -ffast-math -fhonor-nans -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-NANS %s
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// RUN: %clang -### -ffast-math -fno-finite-math-only -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-NO-NANS %s
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// CHECK-NO-NO-NANS: "-cc1"
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// CHECK-NO-NO-NANS-NOT: "-menable-no-nans"
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// CHECK-NO-NO-NANS: "-o"
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//
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// RUN: %clang -### -fassociative-math -freciprocal-math -fno-signed-zeros \
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// RUN: -fno-trapping-math -fno-associative-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -fassociative-math -freciprocal-math -fno-signed-zeros \
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// RUN: -fno-trapping-math -fno-reciprocal-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -fassociative-math -freciprocal-math -fno-signed-zeros \
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// RUN: -fno-trapping-math -fsigned-zeros -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -fassociative-math -freciprocal-math -fno-signed-zeros \
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// RUN: -fno-trapping-math -ftrapping-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -funsafe-math-optimizations -fno-associative-math -c %s \
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// RUN: 2>&1 | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -funsafe-math-optimizations -fno-reciprocal-math -c %s \
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// RUN: 2>&1 | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -funsafe-math-optimizations -fsigned-zeros -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -funsafe-math-optimizations -ftrapping-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -funsafe-math-optimizations -fno-unsafe-math-optimizations \
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// RUN: -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -ffast-math -fno-associative-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -ffast-math -fno-reciprocal-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -ffast-math -fsigned-zeros -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -ffast-math -ftrapping-math -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// RUN: %clang -### -ffast-math -fno-unsafe-math-optimizations -c %s 2>&1 \
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// RUN: | FileCheck --check-prefix=CHECK-NO-UNSAFE-MATH %s
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// CHECK-NO-UNSAFE-MATH: "-cc1"
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// CHECK-NO-UNSAFE-MATH-NOT: "-menable-unsafe-fp-math"
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// CHECK-NO-UNSAFE-MATH: "-o"
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