llvm-project/llvm
Jonas Paulsson 8a7bd24c82 [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
..
bindings [DebugInfo] Emit address space with DW_AT_address_class attribute for pointer and reference types 2017-03-08 23:55:44 +00:00
cmake [cmake] Refactor warning flag logic to use Unix warnings with clang-cl 2017-03-16 17:05:16 +00:00
docs Resubmit r297897: [PGO] Value profile for size of memory intrinsic calls 2017-03-16 21:15:48 +00:00
examples llvm/examples/Kaleidoscope/BuildingAJIT: More fixup corresponding to r295636. 2017-02-20 10:07:41 +00:00
include Revert "Make NativeExeSymbol a concrete subclass of NativeRawSymbol [PDB]" 2017-03-17 00:46:42 +00:00
lib [SystemZ] Add use of super-reg in splitMove() 2017-03-17 06:47:08 +00:00
projects [cmake] Include openmp with add_llvm_external_project 2017-03-07 18:54:17 +00:00
resources
runtimes
test [SystemZ] Add use of super-reg in splitMove() 2017-03-17 06:47:08 +00:00
tools LTO: Fix a potential race condition in the caching API. 2017-03-17 00:34:07 +00:00
unittests SmallString doesn't have implicit conversion from const char*. 2017-03-17 00:28:23 +00:00
utils Removed unnecessary semicolon. NFCI. 2017-03-15 22:50:47 +00:00
.arcconfig
.clang-format
.clang-tidy
.gitignore [.gitignore] Update .gitignore to ignore a nested build directory 2017-02-24 23:09:30 +00:00
CMakeLists.txt remove Cmake option for LLVM_DISABLE_ABI_BREAKING_CHECKS_ENFORCING 2017-03-07 00:51:07 +00:00
CODE_OWNERS.TXT CODE_OWNERS: Take code ownership of instruction scheduling. 2017-03-10 18:34:37 +00:00
CREDITS.TXT CODE_OWNERS: Take code ownership of instruction scheduling. 2017-03-10 18:34:37 +00:00
LICENSE.TXT
LLVMBuild.txt
README.txt Test commit. Added a blank line. 2017-03-06 20:45:33 +00:00
RELEASE_TESTERS.TXT
configure
llvm.spec.in

README.txt

Low Level Virtual Machine (LLVM)
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