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llvm-project/clang/test/Preprocessor/unwind-tables.c

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Define __GCC_HAVE_DWARF2_CFI_ASM if applicable In -fno-exceptions -fno-asynchronous-unwind-tables -g0 mode, GCC does not emit `.cfi_*` directives. ``` % diff <(gcc -fno-asynchronous-unwind-tables -dM -E a.c) <(gcc -dM -E a.c) 130a131 > #define __GCC_HAVE_DWARF2_CFI_ASM 1 ``` This macro is useful because code can decide whether inline asm should include `.cfi_*` directives. `.cfi_*` directives without `.cfi_startproc` can cause assembler errors (integrated assembler: `this directive must appear between .cfi_startproc and .cfi_endproc directives`). Differential Revision: https://reviews.llvm.org/D97743
2021-03-10 14:21:36 +08:00
// RUN: %clang %s -dM -E -target x86_64-windows | FileCheck %s --check-prefix=NO
// RUN: %clang %s -dM -E -target x86_64 -fno-asynchronous-unwind-tables | FileCheck %s --check-prefix=NO
// RUN: %clang %s -dM -E -target x86_64 | FileCheck %s
Fix -fno-unwind-tables -fasynchronous-unwind-tables to emit unwind tables This matches GCC. Change the CC1 option to encode the unwind table level (1: needed by exceptions, 2: asynchronous) so that we can support two modes in the future.
2021-09-24 07:15:40 +08:00
// RUN: %clang %s -dM -E -target x86_64 -funwind-tables -fno-asynchronous-unwind-tables -g | FileCheck %s
Define __GCC_HAVE_DWARF2_CFI_ASM if applicable In -fno-exceptions -fno-asynchronous-unwind-tables -g0 mode, GCC does not emit `.cfi_*` directives. ``` % diff <(gcc -fno-asynchronous-unwind-tables -dM -E a.c) <(gcc -dM -E a.c) 130a131 > #define __GCC_HAVE_DWARF2_CFI_ASM 1 ``` This macro is useful because code can decide whether inline asm should include `.cfi_*` directives. `.cfi_*` directives without `.cfi_startproc` can cause assembler errors (integrated assembler: `this directive must appear between .cfi_startproc and .cfi_endproc directives`). Differential Revision: https://reviews.llvm.org/D97743
2021-03-10 14:21:36 +08:00
// RUN: %clang %s -dM -E -target aarch64-apple-darwin | FileCheck %s
// RUN: %clang %s -dM -E -target x86_64 -fno-asynchronous-unwind-tables -g | FileCheck %s
// RUN: %clang %s -dM -E -target x86_64 -fno-asynchronous-unwind-tables -fexceptions | FileCheck %s
// NO-NOT: #define __GCC_HAVE_DWARF2_CFI_ASM
// CHECK: #define __GCC_HAVE_DWARF2_CFI_ASM 1