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Add _Float128 as alias to __float128 to enable compilations on Fedora27/glibc2-26

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Fedora27 is using a new version of glibc that refers to the _Float128 type. This
patch adds that name as an alias to float128. I also added some predefined macro
values for the digits, mantissa, epilon, etc (FloatMacros). For the test case, I
copied an existing float128 test. This functionality needs work long term, but 
it should be sufficient to tread water for a while. At Intel we have test
servers running our LLVM compiler with various open source workloads, the server
has been upgraded to Fedora27 so many workloads are failing due to _Float128.

Patch-By: mibintc
Differential Revision: https://reviews.llvm.org/D40673

llvm-svn: 319703
This commit is contained in:
Erich Keane 2017-12-04 21:58:43 +00:00
parent 0861579610
commit 45cf85b415
4 changed files with 37 additions and 10 deletions
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1
clang/include/clang/Basic/TokenKinds.def
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@ -398,6 +398,7 @@ TYPE_TRAIT_2(__builtin_types_compatible_p, TypeCompatible, KEYNOCXX)
KEYWORD(__builtin_va_arg , KEYALL)
KEYWORD(__extension__ , KEYALL)
KEYWORD(__float128 , KEYALL)
ALIAS("_Float128", __float128 , KEYNOCXX)
KEYWORD(__imag , KEYALL)
KEYWORD(__int128 , KEYALL)
KEYWORD(__label__ , KEYALL)

4
clang/lib/Frontend/InitPreprocessor.cpp
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@ -814,6 +814,10 @@ static void InitializePredefinedMacros(const TargetInfo &TI,
DefineFloatMacros(Builder, "FLT", &TI.getFloatFormat(), "F");
DefineFloatMacros(Builder, "DBL", &TI.getDoubleFormat(), "");
DefineFloatMacros(Builder, "LDBL", &TI.getLongDoubleFormat(), "L");
if (TI.hasFloat128Type())
// FIXME: Switch away from the non-standard "Q" when we can
DefineFloatMacros(Builder, "FLT128", &TI.getFloat128Format(), "Q");
// Define a __POINTER_WIDTH__ macro for stdint.h.
Builder.defineMacro("__POINTER_WIDTH__",

20
clang/test/Preprocessor/cuda-types.cu
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@ -9,40 +9,40 @@
// RUN: %clang --cuda-host-only -nocudainc -target i386-unknown-linux-gnu -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/i386-host-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/i386-host-defines-filtered
// RUN: %clang --cuda-device-only -nocudainc -nocudalib -target i386-unknown-linux-gnu -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/i386-device-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/i386-device-defines-filtered
// RUN: diff %t/i386-host-defines-filtered %t/i386-device-defines-filtered
// RUN: %clang --cuda-host-only -nocudainc -target x86_64-unknown-linux-gnu -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/x86_64-host-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/x86_64-host-defines-filtered
// RUN: %clang --cuda-device-only -nocudainc -nocudalib -target x86_64-unknown-linux-gnu -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/x86_64-device-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/x86_64-device-defines-filtered
// RUN: diff %t/x86_64-host-defines-filtered %t/x86_64-device-defines-filtered
// RUN: %clang --cuda-host-only -nocudainc -target powerpc64-unknown-linux-gnu -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/powerpc64-host-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/powerpc64-host-defines-filtered
// RUN: %clang --cuda-device-only -nocudainc -nocudalib -target powerpc64-unknown-linux-gnu -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/powerpc64-device-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/powerpc64-device-defines-filtered
// RUN: diff %t/powerpc64-host-defines-filtered %t/powerpc64-device-defines-filtered
// RUN: %clang --cuda-host-only -nocudainc -target i386-windows-msvc -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/i386-msvc-host-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/i386-msvc-host-defines-filtered
// RUN: %clang --cuda-device-only -nocudainc -nocudalib -target i386-windows-msvc -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/i386-msvc-device-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/i386-msvc-device-defines-filtered
// RUN: diff %t/i386-msvc-host-defines-filtered %t/i386-msvc-device-defines-filtered
// RUN: %clang --cuda-host-only -nocudainc -target x86_64-windows-msvc -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/x86_64-msvc-host-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/x86_64-msvc-host-defines-filtered
// RUN: %clang --cuda-device-only -nocudainc -nocudalib -target x86_64-windows-msvc -x cuda -E -dM -o - /dev/null \
// RUN: | grep 'define __[^ ]*\(TYPE\|MAX\|SIZEOF|WIDTH\)\|define __GCC_ATOMIC' \
// RUN: | grep -v '__LDBL\|_LONG_DOUBLE' > %t/x86_64-msvc-device-defines-filtered
// RUN: | grep -v '__FLT128\|__LDBL\|_LONG_DOUBLE' > %t/x86_64-msvc-device-defines-filtered
// RUN: diff %t/x86_64-msvc-host-defines-filtered %t/x86_64-msvc-device-defines-filtered

22
clang/test/Sema/_Float128.c Normal file
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@ -0,0 +1,22 @@
// RUN: %clang_cc1 -verify %s
// RUN: %clang_cc1 -triple powerpc64-linux -verify %s
// RUN: %clang_cc1 -triple i686-windows-gnu -verify %s
// RUN: %clang_cc1 -triple x86_64-windows-gnu -verify %s
// RUN: %clang_cc1 -triple x86_64-windows-msvc -verify %s
#if defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__)
_Float128 f;
_Float128 tiny = __FLT128_EPSILON__;
int g(int x, _Float128 *y) {
return x + *y;
}
// expected-no-diagnostics
#else
_Float128 f; // expected-error {{__float128 is not supported on this target}}
float tiny = __FLT128_EPSILON__; // expected-error{{use of undeclared identifier}}
int g(int x, _Float128 *y) { // expected-error {{__float128 is not supported on this target}}
return x + *y;
}
#endif // defined(__FLOAT128__) || defined(__SIZEOF_FLOAT128__)