Martin Sebor 0d68ff87d2 [InstCombine] Transform strrchr to memrchr for constant strings ...

Add an emitter for the memrchr common extension and simplify the strrchr
call handler to use it. This enables transforming calls with the empty
string to the test C ? S : 0.

Reviewed By: nikic

Differential Revision: https://reviews.llvm.org/D128954

2022-07-01 11:10:00 -06:00

64 KiB

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