https://bugs.llvm.org/show_bug.cgi?id=36950
Bug ID: 36950
Summary: Missing canonicalization of select of bitchecks into
icmp
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: lebedev...@gmail.com
CC: llvm-bugs@lists.llvm.org
Copied from https://bugs.llvm.org/show_bug.cgi?id=17564
There is a missing instcombine to get rid of select
https://rise4fun.com/Alive/gEy
After which the assembly is much better:
https://godbolt.org/g/iAYRup
The only difference after that is in "and edi, 3" vs. "test dil, 3"
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