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[CMake] [Clang] Add option to specify PowerPC long double format 

This method introduces new CMake variable
PPC_LINUX_DEFAULT_IEEELONGDOUBLE (false by default) to enable fp128 as
default long double format.

Reviewed By: jsji

Differential Revision: https://reviews.llvm.org/D118110
This commit is contained in:
Qiu Chaofan 2022-01-27 00:49:17 +08:00
parent 4e077c0a0b
commit b797d5e6b2
7 changed files with 20 additions and 7 deletions
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3
clang/CMakeLists.txt
View File

@ -237,6 +237,9 @@ set(ENABLE_LINKER_BUILD_ID OFF CACHE BOOL "pass --build-id to ld")
set(ENABLE_X86_RELAX_RELOCATIONS ON CACHE BOOL
"enable x86 relax relocations by default")
set(PPC_LINUX_DEFAULT_IEEELONGDOUBLE OFF CACHE BOOL
"Enable IEEE binary128 as default long double format on PowerPC Linux.")
set(CLANG_SPAWN_CC1 OFF CACHE BOOL
"Whether clang should use a new process for the CC1 invocation")

3
clang/include/clang/Config/config.h.cmake
View File

@ -78,6 +78,9 @@
/* enable x86 relax relocations by default */
#cmakedefine01 ENABLE_X86_RELAX_RELOCATIONS
/* Enable IEEE binary128 as default long double format on PowerPC Linux. */
#cmakedefine01 PPC_LINUX_DEFAULT_IEEELONGDOUBLE
/* Enable each functionality of modules */
#cmakedefine01 CLANG_ENABLE_ARCMT
#cmakedefine01 CLANG_ENABLE_OBJC_REWRITER

3
clang/include/clang/Driver/ToolChain.h
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@ -409,6 +409,9 @@ public:
/// Check whether to enable x86 relax relocations by default.
virtual bool useRelaxRelocations() const;
/// Check whether use IEEE binary128 as long double format by default.
bool defaultToIEEELongDouble() const;
/// GetDefaultStackProtectorLevel - Get the default stack protector level for
/// this tool chain.
virtual LangOptions::StackProtectorMode

4
clang/lib/Driver/ToolChain.cpp
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@ -109,6 +109,10 @@ bool ToolChain::useRelaxRelocations() const {
return ENABLE_X86_RELAX_RELOCATIONS;
}
bool ToolChain::defaultToIEEELongDouble() const {
return PPC_LINUX_DEFAULT_IEEELONGDOUBLE && getTriple().isOSLinux();
}
SanitizerArgs
ToolChain::getSanitizerArgs(const llvm::opt::ArgList &JobArgs) const {
SanitizerArgs SanArgs(*this, JobArgs, !SanitizerArgsChecked);

2
clang/lib/Driver/ToolChains/Clang.cpp
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@ -2061,7 +2061,7 @@ void Clang::AddPPCTargetArgs(const ArgList &Args,
}
}
bool IEEELongDouble = false;
bool IEEELongDouble = getToolChain().defaultToIEEELongDouble();
for (const Arg *A : Args.filtered(options::OPT_mabi_EQ)) {
StringRef V = A->getValue();
if (V == "ieeelongdouble")

9
clang/test/Analysis/builtin_signbit.cpp
View File

@ -1,6 +1,9 @@
// RUN: %clang -target powerpc-linux-gnu -emit-llvm -S -O0 %s -o - | FileCheck %s --check-prefix=CHECK-BE --check-prefix=CHECK
// RUN: %clang -target powerpc64-linux-gnu -emit-llvm -S -O0 %s -o - | FileCheck %s --check-prefix=CHECK-BE --check-prefix=CHECK
// RUN: %clang -target powerpc64le-linux-gnu -emit-llvm -S -O0 %s -o - | FileCheck %s --check-prefix=CHECK-LE --check-prefix=CHECK
// RUN: %clang -target powerpc-linux-gnu -emit-llvm -S -mabi=ibmlongdouble \
// RUN: -O0 %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-BE
// RUN: %clang -target powerpc64-linux-gnu -emit-llvm -S -mabi=ibmlongdouble \
// RUN: -O0 %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-BE
// RUN: %clang -target powerpc64le-linux-gnu -emit-llvm -S -mabi=ibmlongdouble \
// RUN: -O0 %s -o - | FileCheck %s --check-prefixes=CHECK,CHECK-LE
bool b;
double d = -1.0;

3
clang/test/Driver/ppc-abi.c
View File

@ -63,9 +63,6 @@
// CHECK-ELFv1-IEEE: "-mabi=ieeelongdouble"
// CHECK-ELFv1-IEEE: "-target-abi" "elfv1"
// Check -mabi=ibmlongdouble is the default.
// RUN: %clang -target powerpc64le-linux-gnu %s -### 2>&1 \
// RUN: | FileCheck -check-prefix=CHECK-ELFv2-IBM128 %s
// RUN: %clang -target powerpc64le-linux-gnu %s -mabi=ibmlongdouble -### 2>&1 \
// RUN: | FileCheck -check-prefix=CHECK-ELFv2-IBM128 %s