forked from OSchip/llvm-project
04e4f47e93
This patch splits atomics out of the generic G_LOAD/G_STORE and into their own G_ATOMIC_LOAD/G_ATOMIC_STORE. This is a pragmatic decision rather than a necessary one. Atomic load/store has little in implementation in common with non-atomic load/store. They tend to be handled very differently throughout the backend. It also has the nice side-effect of slightly improving the common-case performance at ISel since there's no longer a need for an atomicity check in the matcher table. All targets have been updated to remove the atomic load/store check from the G_LOAD/G_STORE path. AArch64 has also been updated to mark G_ATOMIC_LOAD/G_ATOMIC_STORE legal. There is one issue with this patch though which also affects the extending loads and truncating stores. The rules only match when an appropriate G_ANYEXT is present in the MIR. For example, (G_ATOMIC_STORE (G_TRUNC:s16 (G_ANYEXT:s32 (G_ATOMIC_LOAD:s16 X)))) will match but: (G_ATOMIC_STORE (G_ATOMIC_LOAD:s16 X)) will not. This shouldn't be a problem at the moment, but as we get better at eliminating extends/truncates we'll likely start failing to match in some cases. The current plan is to fix this in a patch that changes the representation of extending-load/truncating-store to allow the MMO to describe a different type to the operation. llvm-svn: 319691 |
||
|---|---|---|
| .. | ||
| FileCheck | ||
| KillTheDoctor | ||
| LLVMVisualizers | ||
| Misc | ||
| PerfectShuffle | ||
| TableGen | ||
| Target/ARM | ||
| bugpoint | ||
| count | ||
| crosstool | ||
| docker | ||
| emacs | ||
| fpcmp | ||
| gdb-scripts | ||
| git | ||
| git-svn | ||
| jedit | ||
| kate | ||
| lint | ||
| lit | ||
| llvm-build | ||
| llvm-lit | ||
| not | ||
| 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-gisel-cov.py | ||
| llvm-native-gxx | ||
| llvm.grm | ||
| llvmdo | ||
| llvmgrep | ||
| makellvm | ||
| prepare-code-coverage-artifact.py | ||
| schedcover.py | ||
| shuffle_fuzz.py | ||
| shuffle_select_fuzz_tester.py | ||
| sort_includes.py | ||
| test_debuginfo.pl | ||
| update_llc_test_checks.py | ||
| update_mir_test_checks.py | ||
| update_test_checks.py | ||
| wciia.py | ||