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llvm-mirror/lib
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Jonas Paulsson 34e3b8e7cc [SystemZ] Add use of super-reg in splitMove() 
If one of the subregs of the 128 bit reg is undefined when splitMove() splits
a store into two instructions, a use of an undefined physical register
results.

To remedy this, an implicit use of the super register is added onto both new
instructions, along with propagated kill and undef flags.

This was discovered with llvm-stress, and that test case is attached as
test/CodeGen/SystemZ/splitMove_undefReg_mverifier.ll

Thanks to Matthias Braun for helping with a nice explanation.

Review: Ulrich Weigand
llvm-svn: 298047
2017-03-17 06:47:08 +00:00
..
Analysis [SCEV] Compute affine range in another way to avoid bitwidth extending. 2017-03-16 21:07:38 +00:00
AsmParser [DebugInfo] Emit address space with DW_AT_address_class attribute for pointer and reference types 2017-03-08 23:55:44 +00:00
Bitcode SamplePGO ThinLTO ICP fix for local functions. 2017-03-14 17:33:01 +00:00
CodeGen SplitKit: Correctly implement partial subregister copies 2017-03-17 00:41:39 +00:00
DebugInfo Revert "Make NativeExeSymbol a concrete subclass of NativeRawSymbol [PDB]" 2017-03-17 00:46:42 +00:00
Demangle
ExecutionEngine
Fuzzer [libFuzzer] inline the code of __sanitizer_cov_trace_pc_guard into it 2017-03-17 01:45:15 +00:00
IR Remove dead F parameter from Argument constructor 2017-03-16 22:58:56 +00:00
IRReader
LibDriver
LineEditor
Linker [Linker] Provide callback for internalization 2017-03-13 18:08:11 +00:00
LTO LTO: Fix a potential race condition in the caching API. 2017-03-17 00:34:07 +00:00
MC [WebAssembly] Fix some broken type encodings in wasm binary 2017-03-16 20:49:48 +00:00
Object ArchiveWriter: Remove unused variables. NFC. 2017-03-16 20:35:07 +00:00
ObjectYAML [ObjectYAML] Fix issue with DWARF2 AddrSize 8 2017-03-07 21:34:35 +00:00
Option
Passes
ProfileData SamplePGO ThinLTO ICP fix for local functions. 2017-03-14 17:33:01 +00:00
Support Fix linux build. 2017-03-16 22:34:18 +00:00
TableGen
Target [SystemZ] Add use of super-reg in splitMove() 2017-03-17 06:47:08 +00:00
Transforms [RSForGC] Handle vector GEPs 2017-03-17 00:55:53 +00:00
XRay
CMakeLists.txt
LLVMBuild.txt