[Headers][mips] Add `__attribute__((__mode__(__unwind_word__)))` to the _Unwind_Word / _Unwind_SWord definitions
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
diff --git a/clang/lib/Basic/Targets/Mips.cpp b/clang/lib/Basic/Targets/Mips.cpp
index 840ad1b..2cafbe87 100644
--- a/clang/lib/Basic/Targets/Mips.cpp
+++ b/clang/lib/Basic/Targets/Mips.cpp
@@ -215,6 +215,14 @@
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")) {
diff --git a/clang/lib/Basic/Targets/Mips.h b/clang/lib/Basic/Targets/Mips.h
index ca0a5bf..474cda8 100644
--- a/clang/lib/Basic/Targets/Mips.h
+++ b/clang/lib/Basic/Targets/Mips.h
@@ -401,6 +401,8 @@
return (ABI == "n32" || ABI == "n64") || getTargetOpts().ForceEnableInt128;
}
+ unsigned getUnwindWordWidth() const override;
+
bool validateTarget(DiagnosticsEngine &Diags) const override;
};
} // namespace targets
diff --git a/clang/lib/Headers/unwind.h b/clang/lib/Headers/unwind.h
index 0e8317e..438f914 100644
--- a/clang/lib/Headers/unwind.h
+++ b/clang/lib/Headers/unwind.h
@@ -66,8 +66,8 @@
#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;
diff --git a/clang/test/Sema/attr-mode.c b/clang/test/Sema/attr-mode.c
index c0e0426..c89cb65 100644
--- a/clang/test/Sema/attr-mode.c
+++ b/clang/test/Sema/attr-mode.c
@@ -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 @@
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_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