https://bugs.llvm.org/show_bug.cgi?id=43251
Bug ID: 43251
Summary: [InstCombine] Failure to simplify
usub.with.overflow+null check of non-null base pointer
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Again comes up in https://reviews.llvm.org/D67122
for
char* test(char& base, unsigned long offset) {
return &base - offset;
}
We produce
https://godbolt.org/z/luGEju
and fail to simplify further, but we can:
https://rise4fun.com/Alive/Ppo
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