diff options
| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-10-04 19:42:20 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-10-04 19:42:20 +0000 |
| commit | 058666a8d02f5cd348150862a3401c9c4bd0b4d0 (patch) | |
| tree | 528e657ffa85743e93147dcf2632a66d1da5949f /clang/test | |
| parent | fe5e770c6dc7f8b6615b1d40efb18755cd9c5609 (diff) | |
| download | bcm5719-llvm-058666a8d02f5cd348150862a3401c9c4bd0b4d0.tar.gz bcm5719-llvm-058666a8d02f5cd348150862a3401c9c4bd0b4d0.zip | |
Driver: Link crtfastmath.o if it's available and -ffast-math is specified.
crtfastmath.o contains routines to set the floating point flags to a faster,
unsafe mode. Linking it in speeds up code dealing with denormals significantly
(PR14024).
For now this is only enabled on linux where I can test it and crtfastmath.o is
widely available. We may want to provide a similar file with compiler-rt
eventually and/or enable it on other platforms too.
llvm-svn: 165240
Diffstat (limited to 'clang/test')
| -rw-r--r-- | clang/test/Driver/Inputs/basic_linux_tree/usr/lib/gcc/x86_64-unknown-linux/4.6.0/crtfastmath.o | 0 | ||||
| -rw-r--r-- | clang/test/Driver/linux-ld.c | 21 |
2 files changed, 21 insertions, 0 deletions
diff --git a/clang/test/Driver/Inputs/basic_linux_tree/usr/lib/gcc/x86_64-unknown-linux/4.6.0/crtfastmath.o b/clang/test/Driver/Inputs/basic_linux_tree/usr/lib/gcc/x86_64-unknown-linux/4.6.0/crtfastmath.o new file mode 100644 index 00000000000..e69de29bb2d --- /dev/null +++ b/clang/test/Driver/Inputs/basic_linux_tree/usr/lib/gcc/x86_64-unknown-linux/4.6.0/crtfastmath.o diff --git a/clang/test/Driver/linux-ld.c b/clang/test/Driver/linux-ld.c index 7c7837f666c..7021f92f46b 100644 --- a/clang/test/Driver/linux-ld.c +++ b/clang/test/Driver/linux-ld.c @@ -501,3 +501,24 @@ // CHECK-FSL-PPC64: "{{.*}}/crt1.o" // CHECK-FSL-PPC64: "{{.*}}/crtbegin.o" // CHECK-FSL-PPC64: "-L[[SYSROOT]]/usr/lib64/powerpc64-fsl-linux/4.6.2/../.." +// +// Check that crtfastmath.o is linked with -ffast-math. +// RUN: %clang -target x86_64-unknown-linux -### %s \ +// RUN: --sysroot=%S/Inputs/basic_linux_tree 2>&1 \ +// RUN: | FileCheck --check-prefix=CHECK-NOCRTFASTMATH %s +// RUN: %clang -target x86_64-unknown-linux -### %s -ffast-math \ +// RUN: --sysroot=%S/Inputs/basic_linux_tree 2>&1 \ +// RUN: | FileCheck --check-prefix=CHECK-CRTFASTMATH %s +// RUN: %clang -target x86_64-unknown-linux -### %s -funsafe-math-optimizations\ +// RUN: --sysroot=%S/Inputs/basic_linux_tree 2>&1 \ +// RUN: | FileCheck --check-prefix=CHECK-CRTFASTMATH %s +// RUN: %clang -target x86_64-unknown-linux -### %s -ffast-math -fno-fast-math \ +// RUN: --sysroot=%S/Inputs/basic_linux_tree 2>&1 \ +// RUN: | FileCheck --check-prefix=CHECK-NOCRTFASTMATH %s +// We don't have crtfastmath.o in the i386 tree, use it to check that file +// detection works. +// RUN: %clang -target i386-unknown-linux -### %s -ffast-math \ +// RUN: --sysroot=%S/Inputs/basic_linux_tree 2>&1 \ +// RUN: | FileCheck --check-prefix=CHECK-NOCRTFASTMATH %s +// CHECK-CRTFASTMATH: usr/lib/gcc/x86_64-unknown-linux/4.6.0/crtfastmath.o +// CHECK-NOCRTFASTMATH-NOT: crtfastmath.o |
