https://bugs.llvm.org/show_bug.cgi?id=19644
Fangrui Song <i...@maskray.me> changed:
What |Removed |Added
----------------------------------------------------------------------------
CC| |i...@maskray.me
Resolution|--- |FIXED
Status|NEW |RESOLVED
--- Comment #1 from Fangrui Song <i...@maskray.me> ---
Updated .ll
define void @_ZL12Test_S5303X7v() #0 {
%1 = tail call noalias i8* @meow(i64 16)
%2 = bitcast i8* %1 to i64*
%3 = load i64, i64* %2, align 4
%4 = and i64 %3, -2251799813685249
store i64 %4, i64* %2, align 4
ret void
}
; Function Attrs: nobuiltin
declare noalias i8* @meow(i64)
The AND immediate is -2251799813685249 = 0xfff7ffffffffffff
In CurDAG->Combine(BeforeLegalizeTypes, AA, OptLevel),
DAGCombiner::ReduceLoadOpStoreWidth optimizes 0xfff7ffffffffffff with: andb
$0xf7, 6(%rax)
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