https://bugs.llvm.org/show_bug.cgi?id=46138
Simon Pilgrim <[email protected]> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|NEW |RESOLVED
Resolution|--- |FIXED
Fixed By Commit(s)| |e1d4ca00094a4267b6fd70f613f
| |2e0390b2a8cbf
--- Comment #1 from Simon Pilgrim <[email protected]> ---
Constant rotations are now folded to llvm.fshl in InstCombine:
define i32 @fi32 %0) {
%2 = load i64, i64* @_ZZ1fjE1x, align 8
%3 = add i64 %2, 1
%4 = tail call i64 @llvm.fshl.i64(i64 %3, i64 %3, i64 32)
store i64 %4, i64* @_ZZ1fjE1x, align 8
%5 = trunc i64 %4 to i32
ret i32 %5
}
declare i64 @llvm.fshl.i64(i64, i64, i64)
f:
movq _ZZ1fjE1x(%rip), %rax
incq %rax
rorxq $32, %rax, %rax
movq %rax, _ZZ1fjE1x(%rip)
retq
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