forked from OSchip/llvm-project
138328e45c
If we have: R = sub X, Y P = cmp Y, X ...then flipping the operands in the compare instruction can allow using a subtract that sets compare flags. Motivated by diffs in D58875 - not sure if this changes anything there, but this seems like a good thing independent of that. There's a more involved version of this transform already in IR (in instcombine although that seems misplaced to me) - see "swapMayExposeCSEOpportunities()". Differential Revision: https://reviews.llvm.org/D63958 llvm-svn: 365711 |
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| .. | ||
| codemodel.ll | ||
| comparisons_i32.ll | ||
| comparisons_i64.ll | ||
| constant_multiply.ll | ||
| delay_filler.ll | ||
| i32.ll | ||
| inlineasm-output-template.ll | ||
| lanai-misched-trivial-disjoint.ll | ||
| lit.local.cfg | ||
| lshift64.ll | ||
| masking_setccs.ll | ||
| mem_alu_combiner.ll | ||
| multiply.ll | ||
| peephole-compare.mir | ||
| rshift64.ll | ||
| select.ll | ||
| set_and_hi.ll | ||
| shift.ll | ||
| stack-frame.ll | ||
| sub-cmp-peephole.ll | ||
| subword.ll | ||