forked from OSchip/llvm-project
41ed4034dd
In testing, we've found yet another miscompile caused by the new tables. And this one is even less clear how to fix (we could teach it to fold a 16-bit load instead of the 32-bit load it wants, or block folding entirely). Also, the approach to excluding instructions seems increasingly to not scale well. I have left a more detailed analysis on the review log for the original patch (https://reviews.llvm.org/D32684) along with suggested path forward. I will land an additional test case that I wrote which covers the code that was miscompiling (folding into the output of `pextrw`) in a subsequent commit to keep this a pure revert. For each commit reverted here, I've restricted the revert to the non-test code touching the x86 fold table emission until the last commit where I did revert the test updates. This means the *new* test cases added for `insertps` and `xchg` remain untouched (and continue to pass). Reverted commits: r304540: [X86] Don't fold into memory operands into insertps in the ... r304347: [TableGen] Adapt more places to getValueAsString now ... r304163: [X86] Don't fold away the memory operand of an xchg. r304123: Don't capture a temporary std::string in a StringRef. r304122: Resubmit "[X86] Adding new LLVM TableGen backend that ..." Original commit was in r304088, and after a string of fixes was reverted previously in r304121 to fix build bots, and then re-landed in r304122. llvm-svn: 304762 |
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| .. | ||
| FileCheck | ||
| KillTheDoctor | ||
| LLVMVisualizers | ||
| Misc | ||
| PerfectShuffle | ||
| TableGen | ||
| Target/ARM | ||
| bugpoint | ||
| count | ||
| crosstool | ||
| emacs | ||
| fpcmp | ||
| gdb-scripts | ||
| git | ||
| git-svn | ||
| jedit | ||
| kate | ||
| lint | ||
| lit | ||
| llvm-build | ||
| llvm-lit | ||
| not | ||
| opt-viewer | ||
| release | ||
| sanitizers | ||
| testgen | ||
| textmate | ||
| unittest | ||
| valgrind | ||
| vim | ||
| vscode | ||
| yaml-bench | ||
| DSAclean.py | ||
| DSAextract.py | ||
| GenLibDeps.pl | ||
| GetRepositoryPath | ||
| GetSourceVersion | ||
| LLVMBuild.txt | ||
| UpdateCMakeLists.pl | ||
| abtest.py | ||
| bisect | ||
| bisect-skip-count | ||
| check-each-file | ||
| clang-parse-diagnostics-file | ||
| codegen-diff | ||
| countloc.sh | ||
| create_ladder_graph.py | ||
| extract_symbols.py | ||
| findmisopt | ||
| findoptdiff | ||
| findsym.pl | ||
| getsrcs.sh | ||
| lldbDataFormatters.py | ||
| llvm-compilers-check | ||
| llvm-native-gxx | ||
| llvm.grm | ||
| llvmdo | ||
| llvmgrep | ||
| makellvm | ||
| prepare-code-coverage-artifact.py | ||
| schedcover.py | ||
| shuffle_fuzz.py | ||
| sort_includes.py | ||
| test_debuginfo.pl | ||
| update_llc_test_checks.py | ||
| update_test_checks.py | ||
| wciia.py | ||