forked from OSchip/llvm-project
4e545bdb35
SimplifyCFG implements basic jump threading, if a branch is performed on a phi node with constant operands. However, InstCombine canonicalizes such phis to the condition value of a previous branch, if possible. SimplifyCFG does support this as well, but only in the very limited case where the same condition is used in a direct predecessor -- notably, this does not include the common diamond pattern (i.e. two consecutive if/elses on the same condition). This patch extends the code to look back a limited number of blocks to find a branch on the same value, rather than only looking at the direct predecessor. Fixes https://github.com/llvm/llvm-project/issues/54980. Differential Revision: https://reviews.llvm.org/D124159 |
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| .. | ||
| assumption.ll | ||
| dither.ll | ||
| fpmath.ll | ||
| indirect-call.ll | ||
| int_sideeffect.ll | ||
| operand-mismatch.ll | ||
| sink-combine-metadata.ll | ||
| sink-common-code.ll | ||
| struct.ll | ||