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33deb195f9
Try to use MVC when spilling the destination of a simple load or the source of a simple store. As explained in the comment, this doesn't yet handle the case where the load or store location is also a frame index, since that could lead to two simultaneous scavenger spills, something the backend can't handle yet. spill-02.py tests that this restriction kicks in, but unfortunately I've not yet found a case that would fail without it. The volatile trick I used for other scavenger tests doesn't work here because we can't use MVC for volatile accesses anyway. I'm planning on relaxing the restriction later, hopefully with a test that does trigger the problem... Tests @f8 and @f9 also showed that L(G)RL and ST(G)RL were wrongly classified as SimpleBDX{Load,Store}. It wouldn't be easy to test for that bug separately, which is why I didn't split out the fix as a separate patch. llvm-svn: 185434 |
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Analysis | ||
AsmParser | ||
Bitcode | ||
CodeGen | ||
DebugInfo | ||
ExecutionEngine | ||
IR | ||
IRReader | ||
Linker | ||
MC | ||
Object | ||
Option | ||
Support | ||
TableGen | ||
Target | ||
Transforms | ||
CMakeLists.txt | ||
LLVMBuild.txt | ||
Makefile |