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| author | Yonghong Song <yhs@fb.com> | 2019-08-03 23:41:26 +0000 |
|---|---|---|
| committer | Yonghong Song <yhs@fb.com> | 2019-08-03 23:41:26 +0000 |
| commit | 44b16bd4a5b20ce8b4e9ef56836123a2038f3670 (patch) | |
| tree | e5a67d676dc8df38e66b489c0f71954243e4444c /llvm/lib/Transforms/Utils/SimplifyCFG.cpp | |
| parent | 2edeb8a11a0a324f627b8622066b6997e057bd63 (diff) | |
| download | bcm5719-llvm-44b16bd4a5b20ce8b4e9ef56836123a2038f3670.tar.gz bcm5719-llvm-44b16bd4a5b20ce8b4e9ef56836123a2038f3670.zip | |
[Transforms] Do not drop !preserve.access.index metadata
Currently, when a GVN or CSE optimization happens,
the llvm.preserve.access.index metadata is dropped.
This caused a problem for BPF AbstructMemberOffset phase
as it relies on the metadata (debuginfo types).
This patch added proper hooks in lib/Transforms to
preserve !preserve.access.index metadata. A test
case is added to ensure metadata is preserved under CSE.
Differential Revision: https://reviews.llvm.org/D65700
llvm-svn: 367769
Diffstat (limited to 'llvm/lib/Transforms/Utils/SimplifyCFG.cpp')
| -rw-r--r-- | llvm/lib/Transforms/Utils/SimplifyCFG.cpp | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp index 63015e69a36..33dbbf91cd6 100644 --- a/llvm/lib/Transforms/Utils/SimplifyCFG.cpp +++ b/llvm/lib/Transforms/Utils/SimplifyCFG.cpp @@ -1313,7 +1313,8 @@ static bool HoistThenElseCodeToIf(BranchInst *BI, LLVMContext::MD_dereferenceable, LLVMContext::MD_dereferenceable_or_null, LLVMContext::MD_mem_parallel_loop_access, - LLVMContext::MD_access_group}; + LLVMContext::MD_access_group, + LLVMContext::MD_preserve_access_index}; combineMetadata(I1, I2, KnownIDs, true); // I1 and I2 are being combined into a single instruction. Its debug |
