forked from OSchip/llvm-project
73ceb50d85
to @objc_autorelease if its operand is a PHI and the PHI has an equivalent value that is used by a return instruction. For example, ARC optimizer shouldn't replace the call in the following example, as doing so breaks the AutoreleaseRV/RetainRV optimization: %v1 = bitcast i32* %v0 to i8* br label %bb3 bb2: %v3 = bitcast i32* %v2 to i8* br label %bb3 bb3: %p = phi i8* [ %v1, %bb1 ], [ %v3, %bb2 ] %retval = phi i32* [ %v0, %bb1 ], [ %v2, %bb2 ] ; equivalent to %p %v4 = tail call i8* @objc_autoreleaseReturnValue(i8* %p) ret i32* %retval Also, make sure ObjCARCContract replaces @objc_autoreleaseReturnValue's operand uses with its value so that the call gets tail-called. rdar://problem/15894705 llvm-svn: 323009 |
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| .. | ||
| Coroutines | ||
| Hello | ||
| IPO | ||
| InstCombine | ||
| Instrumentation | ||
| ObjCARC | ||
| Scalar | ||
| Utils | ||
| Vectorize | ||
| CMakeLists.txt | ||
| LLVMBuild.txt | ||