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[Headers][mips] Add __attribute__((__mode__(__unwind_word__))) to the _Unwind_Word / _Unwind_SWord definitions

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The rationale of this change is to fix _Unwind_Word / _Unwind_SWord
definitions for MIPS N32 ABI. This ABI uses 32-bit pointers,
but _Unwind_Word and _Unwind_SWord types are eight bytes long.

 # The __attribute__((__mode__(__unwind_word__))) is added to the type
   definitions. It makes them equal to the corresponding definitions used
   by GCC and allows to override types using `getUnwindWordWidth` function.
 # The `getUnwindWordWidth` virtual function override in the `MipsTargetInfo`
   class and provides correct type size values.

Differential revision: https://reviews.llvm.org/D58165

llvm-svn: 353965
This commit is contained in:
Simon Atanasyan 2019-02-13 18:27:09 +00:00
parent 430d294f0b
commit 4c22a57414
4 changed files with 28 additions and 3 deletions
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8
clang/lib/Basic/Targets/Mips.cpp
View File

@ -215,6 +215,14 @@ ArrayRef<Builtin::Info> MipsTargetInfo::getTargetBuiltins() const {
Builtin::FirstTSBuiltin);
}
unsigned MipsTargetInfo::getUnwindWordWidth() const {
return llvm::StringSwitch<unsigned>(ABI)
.Case("o32", 32)
.Case("n32", 64)
.Case("n64", 64)
.Default(getPointerWidth(0));
}
bool MipsTargetInfo::validateTarget(DiagnosticsEngine &Diags) const {
// microMIPS64R6 backend was removed.
if (getTriple().isMIPS64() && IsMicromips && (ABI == "n32" || ABI == "n64")) {

2
clang/lib/Basic/Targets/Mips.h
View File

@ -401,6 +401,8 @@ public:
return (ABI == "n32" || ABI == "n64") || getTargetOpts().ForceEnableInt128;
}
unsigned getUnwindWordWidth() const override;
bool validateTarget(DiagnosticsEngine &Diags) const override;
};
} // namespace targets

4
clang/lib/Headers/unwind.h
View File

@ -66,8 +66,8 @@ extern "C" {
#pragma GCC visibility push(default)
#endif
typedef uintptr_t _Unwind_Word;
typedef intptr_t _Unwind_Sword;
typedef uintptr_t _Unwind_Word __attribute__((__mode__(__unwind_word__)));
typedef intptr_t _Unwind_Sword __attribute__((__mode__(__unwind_word__)));
typedef uintptr_t _Unwind_Ptr;
typedef uintptr_t _Unwind_Internal_Ptr;
typedef uint64_t _Unwind_Exception_Class;

17
clang/test/Sema/attr-mode.c
View File

@ -6,6 +6,12 @@
// RUN: -verify %s
// RUN: %clang_cc1 -triple x86_64-pc-linux-gnux32 -DTEST_64BIT_X86 -fsyntax-only \
// RUN: -verify %s
// RUN: %clang_cc1 -triple mips-linux-gnu -DTEST_MIPS_32 -fsyntax-only \
// RUN: -verify %s
// RUN: %clang_cc1 -triple mips64-linux-gnuabin32 -DTEST_MIPS_N32 -fsyntax-only \
// RUN: -verify %s
// RUN: %clang_cc1 -triple mips64-linux-gnu -DTEST_MIPS_64 -fsyntax-only \
// RUN: -verify %s
typedef int i16_1 __attribute((mode(HI)));
int i16_1_test[sizeof(i16_1) == 2 ? 1 : -1];
@ -33,7 +39,7 @@ typedef _Complex double c32 __attribute((mode(SC)));
int c32_test[sizeof(c32) == 8 ? 1 : -1];
typedef _Complex float c64 __attribute((mode(DC)));
#ifndef TEST_64BIT_PPC64 // Note, 'XC' mode is illegal for PPC64 machines.
#if !defined(__ppc__) && !defined(__mips__) // Note, 'XC' mode is illegal for PPC64 and MIPS machines.
typedef _Complex float c80 __attribute((mode(XC)));
#endif
@ -84,6 +90,15 @@ void f_ft128_arg(long double *x);
void f_ft128_complex_arg(_Complex long double *x);
void test_TFtype(f128ibm *a) { f_ft128_arg (a); }
void test_TCtype(c128ibm *a) { f_ft128_complex_arg (a); }
#elif TEST_MIPS_32
typedef unsigned int gcc_unwind_word __attribute__((mode(unwind_word)));
int foo[sizeof(gcc_unwind_word) == 4 ? 1 : -1];
#elif TEST_MIPS_N32
typedef unsigned int gcc_unwind_word __attribute__((mode(unwind_word)));
int foo[sizeof(gcc_unwind_word) == 8 ? 1 : -1];
#elif TEST_MIPS_64
typedef unsigned int gcc_unwind_word __attribute__((mode(unwind_word)));
int foo[sizeof(gcc_unwind_word) == 8 ? 1 : -1];
#else
#error Unknown test architecture.
#endif