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| author | NAKAMURA Takumi <geek4civic@gmail.com> | 2013-01-03 03:30:22 +0000 |
|---|---|---|
| committer | NAKAMURA Takumi <geek4civic@gmail.com> | 2013-01-03 03:30:22 +0000 |
| commit | 1eae141f195b7edd060c2c872ea3eac4ce937262 (patch) | |
| tree | 5b04e84752e70803ad014d63813b68fa956d68b1 /include/llvm/Support/Compiler.h | |
| parent | 82860f63e1678077fe665c21179b9df47fd313bb (diff) | |
| download | external_llvm-1eae141f195b7edd060c2c872ea3eac4ce937262.zip external_llvm-1eae141f195b7edd060c2c872ea3eac4ce937262.tar.gz external_llvm-1eae141f195b7edd060c2c872ea3eac4ce937262.tar.bz2 | |
Compiler.h: Leave LLVM_BUILTIN_UNREACHABLE undefined if it is unavailable in host compiler.
Users of LLVM_BUILTIN_UNREACHABLE should be responsible in the case when LLVM_BUILTIN_UNREACHABLE is undefined.
Actually, (0, (p)) in LLVM_ASSUME_ALIGNED(p, a) caused thousands of warnings on g++-4.4. It was a motivation in this commit.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@171455 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/llvm/Support/Compiler.h')
| -rw-r--r-- | include/llvm/Support/Compiler.h | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/include/llvm/Support/Compiler.h b/include/llvm/Support/Compiler.h index 5ed30a4..b32939e 100644 --- a/include/llvm/Support/Compiler.h +++ b/include/llvm/Support/Compiler.h @@ -225,8 +225,6 @@ # define LLVM_BUILTIN_UNREACHABLE __builtin_unreachable() #elif defined(_MSC_VER) # define LLVM_BUILTIN_UNREACHABLE __assume(false) -#else -# define LLVM_BUILTIN_UNREACHABLE 0 #endif /// LLVM_BUILTIN_TRAP - On compilers which support it, expands to an expression @@ -244,9 +242,11 @@ || (__GNUC__ == 4 && __GNUC_MINOR__ >= 7)) // FIXME: Enable on clang when it supports it. # define LLVM_ASSUME_ALIGNED(p, a) __builtin_assume_aligned(p, a) -#else +#elif defined(LLVM_BUILTIN_UNREACHABLE) # define LLVM_ASSUME_ALIGNED(p, a) \ (((uintptr_t(p) % (a)) == 0) ? (p) : (LLVM_BUILTIN_UNREACHABLE, (p))) +#else +# define LLVM_ASSUME_ALIGNED(p, a) (p) #endif #endif |