https://bugs.llvm.org/show_bug.cgi?id=49001
Bug ID: 49001
Summary: Failure to optimize out indirect access to unused
variable
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: enhancement
Priority: P
Component: Scalar Optimizations
Assignee: unassignedb...@nondot.org
Reporter: gabrav...@gmail.com
CC: llvm-bugs@lists.llvm.org
void f(bool x)
{
int a, b;
*(x ? &a : &b) = 0;
}
This can be optimized to doing nothing. This transformation is done by GCC, but
not by LLVM.
Godbolt comparison here: https://godbolt.org/z/8Grfjd
(I think an alive2 link would be useless here, considering it's not really
applicable to this kind of stuff)
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