dim added a comment.
In D69825#2071687 <https://reviews.llvm.org/D69825#2071687>, @dim wrote:
> Trying to reduce this now.
Unfortunately this turned out to be a red herring, as the test case got reduced
by `creduce` to just:
a() { b(""); }
The valgrind warnings are also different when you build clang with clang,
instead of gcc as I did first. In that case, you get dozens of these instead:
==525651== Conditional jump or move depends on uninitialised value(s)
==525651== at 0xBB1D71: SimplifyAndInst(llvm::Value*, llvm::Value*,
llvm::SimplifyQuery const&, unsigned int) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0xBBF6D0: ThreadBinOpOverPHI(llvm::Instruction::BinaryOps,
llvm::Value*, llvm::Value*, llvm::SimplifyQuery const&, unsigned int) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0xBB1F87: SimplifyAndInst(llvm::Value*, llvm::Value*,
llvm::SimplifyQuery const&, unsigned int) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x13898E8:
llvm::InstCombiner::visitAnd(llvm::BinaryOperator&) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x1365A6D: llvm::InstCombiner::run() (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x1367AEC: combineInstructionsOverFunction(llvm::Function&,
llvm::InstCombineWorklist&, llvm::AAResults*, llvm::AssumptionCache&,
llvm::TargetLibraryInfo&, llvm::DominatorTree&,
llvm::OptimizationRemarkEmitter&, llvm::BlockFrequencyInfo*,
llvm::ProfileSummaryInfo*, bool, unsigned int, llvm::LoopInfo*) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x1369369:
llvm::InstructionCombiningPass::runOnFunction(llvm::Function&) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x121015B:
llvm::FPPassManager::runOnFunction(llvm::Function&) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x3BA5188: (anonymous
namespace)::CGPassManager::runOnModule(llvm::Module&) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x1210B3F: llvm::legacy::PassManagerImpl::run(llvm::Module&)
(in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x19A503A:
clang::EmitBackendOutput(clang::DiagnosticsEngine&, clang::HeaderSearchOptions
const&, clang::CodeGenOptions const&, clang::TargetOptions const&,
clang::LangOptions const&, llvm::DataLayout const&, llvm::Module*,
clang::BackendAction, std::unique_ptr<llvm::raw_pwrite_stream,
std::default_delete<llvm::raw_pwrite_stream> >) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
==525651== by 0x2500BD4:
clang::BackendConsumer::HandleTranslationUnit(clang::ASTContext&) (in
/home/dim/obj/llvm-llvmorg-10.0.0-53-gf79cd71e145-linux5-x86_64-ninja-rel-1/bin/clang-10)
I'm unsure how to continue.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D69825/new/
https://reviews.llvm.org/D69825
_______________________________________________
cfe-commits mailing list
cfe-commits@lists.llvm.org
https://lists.llvm.org/cgi-bin/mailman/listinfo/cfe-commits
