diff options
| author | JF Bastien <jfb@chromium.org> | 2013-07-30 16:38:26 -0700 |
|---|---|---|
| committer | JF Bastien <jfb@chromium.org> | 2013-07-30 16:38:26 -0700 |
| commit | f75fd0a9f95109b9cb13a74aad6dcc98c3d5d625 (patch) | |
| tree | 652c465d76008ef58f5c8d55827050a6f1d875e1 /lib/Transforms/NaCl/PNaClABISimplify.cpp | |
| parent | 423b3bb89c78e96c59843aa7c6e55d01bde174d1 (diff) | |
Rewrite ``asm("":::"memory")`` to ``fence seq_cst``
This is often used as a compiler barrier and should "just work" in user code.
BUG= https://code.google.com/p/nativeclient/issues/detail?id=2345
R=eliben@chromium.org
TEST= (cd ./pnacl/build/llvm_x86_64 && ninja check-all)
Review URL: https://codereview.chromium.org/21178002
Diffstat (limited to 'lib/Transforms/NaCl/PNaClABISimplify.cpp')
| -rw-r--r-- | lib/Transforms/NaCl/PNaClABISimplify.cpp | 4 |
1 files changed, 3 insertions, 1 deletions
diff --git a/lib/Transforms/NaCl/PNaClABISimplify.cpp b/lib/Transforms/NaCl/PNaClABISimplify.cpp index 189d87f2cb..4f8e0e4f87 100644 --- a/lib/Transforms/NaCl/PNaClABISimplify.cpp +++ b/lib/Transforms/NaCl/PNaClABISimplify.cpp @@ -30,8 +30,10 @@ void llvm::PNaClABISimplifyAddPreOptPasses(PassManager &PM) { // LowerExpect converts Intrinsic::expect into branch weights, // which can then be removed after BlockPlacement. PM.add(createLowerExpectIntrinsicPass()); - // Rewrite unsupported intrinsics to simpler constructs. + // Rewrite unsupported intrinsics and inline assembly directives to + // simpler and portable constructs. PM.add(createRewriteLLVMIntrinsicsPass()); + PM.add(createRewriteAsmDirectivesPass()); // LowerInvoke prevents use of C++ exception handling, which is not // yet supported in the PNaCl ABI. PM.add(createLowerInvokePass()); |