64c80b4e39
Summary:
Current generation of lifetime intrinsics does not handle cases like:
```
{
char x;
l1:
bar(&x, 1);
}
goto l1;
```
We will get code like this:
```
%x = alloca i8, align 1
call void @llvm.lifetime.start(i64 1, i8* nonnull %x)
br label %l1
l1:
%call = call i32 @bar(i8* nonnull %x, i32 1)
call void @llvm.lifetime.end(i64 1, i8* nonnull %x)
br label %l1
```
So the second time bar was called for x which is marked as dead.
Lifetime markers here are misleading so it's better to remove them at all.
This type of bypasses are rare, e.g. code detects just 8 functions building
clang (2329 targets).
PR28267
Reviewers: eugenis
Subscribers: beanz, mgorny, cfe-commits
Differential Revision: https://reviews.llvm.org/D24693
llvm-svn: 285176
98 lines
1.7 KiB
CMake
98 lines
1.7 KiB
CMake
set(LLVM_LINK_COMPONENTS
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Analysis
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BitReader
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BitWriter
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Core
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Coroutines
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Coverage
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IPO
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IRReader
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InstCombine
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Instrumentation
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LTO
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Linker
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MC
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ObjCARCOpts
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Object
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ProfileData
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ScalarOpts
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Support
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Target
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TransformUtils
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)
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# In a standard Clang+LLVM build, we need to generate intrinsics before
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# building codegen. In a standalone build, LLVM is already built and we don't
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# need this dependency. Furthermore, LLVM doesn't export it so we can't have
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# this dependency.
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set(codegen_deps intrinsics_gen)
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if (CLANG_BUILT_STANDALONE)
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set(codegen_deps)
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endif()
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add_clang_library(clangCodeGen
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BackendUtil.cpp
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CGAtomic.cpp
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CGBlocks.cpp
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CGBuiltin.cpp
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CGCUDABuiltin.cpp
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CGCUDANV.cpp
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CGCUDARuntime.cpp
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CGCXX.cpp
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CGCXXABI.cpp
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CGCall.cpp
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CGClass.cpp
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CGCleanup.cpp
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CGCoroutine.cpp
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CGDebugInfo.cpp
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CGDecl.cpp
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CGDeclCXX.cpp
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CGException.cpp
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CGExpr.cpp
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CGExprAgg.cpp
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CGExprCXX.cpp
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CGExprComplex.cpp
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CGExprConstant.cpp
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CGExprScalar.cpp
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CGLoopInfo.cpp
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CGObjC.cpp
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CGObjCGNU.cpp
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CGObjCMac.cpp
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CGObjCRuntime.cpp
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CGOpenCLRuntime.cpp
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CGOpenMPRuntime.cpp
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CGOpenMPRuntimeNVPTX.cpp
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CGRecordLayoutBuilder.cpp
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CGStmt.cpp
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CGStmtOpenMP.cpp
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CGVTT.cpp
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CGVTables.cpp
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CodeGenABITypes.cpp
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CodeGenAction.cpp
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CodeGenFunction.cpp
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CodeGenModule.cpp
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CodeGenPGO.cpp
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CodeGenTBAA.cpp
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CodeGenTypes.cpp
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CoverageMappingGen.cpp
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ItaniumCXXABI.cpp
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MicrosoftCXXABI.cpp
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ModuleBuilder.cpp
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ObjectFilePCHContainerOperations.cpp
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SanitizerMetadata.cpp
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SwiftCallingConv.cpp
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TargetInfo.cpp
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VarBypassDetector.cpp
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DEPENDS
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${codegen_deps}
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LINK_LIBS
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clangAnalysis
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clangAST
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clangAnalysis
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clangBasic
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clangFrontend
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clangLex
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)
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