diff options
| author | Richard Smith <richard-llvm@metafoo.co.uk> | 2017-08-26 01:04:35 +0000 |
|---|---|---|
| committer | Richard Smith <richard-llvm@metafoo.co.uk> | 2017-08-26 01:04:35 +0000 |
| commit | 55deb317c4912a2615cc78eebcd987e70ad2d749 (patch) | |
| tree | 01e0c503b1afd3aae37f7a0404ecd00d9e9a2949 /include/clang/Frontend/CodeGenOptions.def | |
| parent | d673c2fd214c12ec8aee93ae603c97082f4edb06 (diff) | |
Add flag to request Clang is ABI-compatible with older versions of itself
This patch adds a flag -fclang-abi-compat that can be used to request that
Clang attempts to be ABI-compatible with some older version of itself.
This is provided on a best-effort basis; right now, this can be used to undo
the ABI change in r310401, reverting Clang to its prior C++ ABI for pass/return
by value of class types affected by that change, and to undo the ABI change in
r262688, reverting Clang to using integer registers rather than SSE registers
for passing <1 x long long> vectors. The intent is that we will maintain this
backwards compatibility path as we make ABI-breaking fixes in future.
The reversion to the old behavior for r310401 is also applied to the PS4 target
since that change is not part of its platform ABI (which is essentially to do
whatever Clang 3.2 did).
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@311823 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'include/clang/Frontend/CodeGenOptions.def')
| -rw-r--r-- | include/clang/Frontend/CodeGenOptions.def | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/include/clang/Frontend/CodeGenOptions.def b/include/clang/Frontend/CodeGenOptions.def index c9040e7e40..a806c48765 100644 --- a/include/clang/Frontend/CodeGenOptions.def +++ b/include/clang/Frontend/CodeGenOptions.def @@ -120,6 +120,10 @@ CODEGENOPT(NoZeroInitializedInBSS , 1, 0) ///< -fno-zero-initialized-in-bss. ENUM_CODEGENOPT(ObjCDispatchMethod, ObjCDispatchMethodKind, 2, Legacy) CODEGENOPT(OmitLeafFramePointer , 1, 0) ///< Set when -momit-leaf-frame-pointer is ///< enabled. + +/// A version of Clang that we should attempt to be ABI-compatible with. +ENUM_CODEGENOPT(ClangABICompat, ClangABI, 4, ClangABI::Latest) + VALUE_CODEGENOPT(OptimizationLevel, 2, 0) ///< The -O[0-3] option specified. VALUE_CODEGENOPT(OptimizeSize, 2, 0) ///< If -Os (==1) or -Oz (==2) is specified. |