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llvm-project/clang/test/Driver/default-denormal-fp-math.c

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clang: Guess at some platform FTZ/DAZ default settings This is to avoid performance regressions when the default attribute behavior is fixed to assume ieee. I tested the default on x86_64 ubuntu, which seems to default to FTZ/DAZ, but am guessing for x86 and PS4.
2019-11-08 09:14:51 +08:00
// RUN: %clang -### -target arm-unknown-linux-gnu -c %s -v 2>&1 | FileCheck -check-prefix=CHECK-IEEE %s
// RUN: %clang -### -target i386-unknown-linux-gnu -c %s -v 2>&1 | FileCheck -check-prefix=CHECK-IEEE %s
// RUN: %clang -### -target x86_64-unknown-linux-gnu --sysroot=%S/Inputs/basic_linux_tree -c %s -v 2>&1 | FileCheck -check-prefix=CHECK-IEEE %s
// crtfastmath enables ftz and daz
// RUN: %clang -### -target x86_64-unknown-linux-gnu -ffast-math --sysroot=%S/Inputs/basic_linux_tree -c %s -v 2>&1 | FileCheck -check-prefix=CHECK-PRESERVESIGN %s
// crt not linked in with nostartfiles
// RUN: %clang -### -target x86_64-unknown-linux-gnu -ffast-math -nostartfiles --sysroot=%S/Inputs/basic_linux_tree -c %s -v 2>&1 | FileCheck -check-prefix=CHECK-IEEE %s
// If there's no crtfastmath, don't assume ftz/daz
// RUN: %clang -### -target x86_64-unknown-linux-gnu -ffast-math --sysroot=/dev/null -c %s -v 2>&1 | FileCheck -check-prefix=CHECK-IEEE %s
// RUN: %clang -### -target x86_64-scei-ps4 -c %s -v 2>&1 | FileCheck -check-prefix=CHECK-PRESERVESIGN %s
Assume ieee behavior without denormal-fp-math attribute
2019-11-07 02:26:43 +08:00
// Flag omitted for default
// CHECK-IEEE-NOT: -fdenormal-fp-math
clang: Guess at some platform FTZ/DAZ default settings This is to avoid performance regressions when the default attribute behavior is fixed to assume ieee. I tested the default on x86_64 ubuntu, which seems to default to FTZ/DAZ, but am guessing for x86 and PS4.
2019-11-08 09:14:51 +08:00
// CHECK-PRESERVESIGN: -fdenormal-fp-math=preserve-sign,preserve-sign