https://bugs.llvm.org/show_bug.cgi?id=45470
Changpeng Fang <changpeng.f...@amd.com> changed:
What |Removed |Added
----------------------------------------------------------------------------
Resolution|INVALID |---
Status|RESOLVED |REOPENED
--- Comment #3 from Changpeng Fang <changpeng.f...@amd.com> ---
Thanks for looking into this. Right the reduced test does not reproduce the
issue. So I attached the original one extract.O1.ll:
We don't expect to see "chfang(float undef)" after
opt -O1 -gvn extraxt.O1.ll -S:
bb1355: ; preds = %bb1379, %bb1346
%tmp1356 = phi i32 [ 0, %bb1346 ], [ %tmp1383, %bb1379 ]
%tmp1357 = shl i32 %tmp1356, 2
%tmp1358 = getelementptr inbounds [16 x i16], [16 x i16] addrspace(5)* %tmp,
i32 0, i32 %tmp1357
store i16 11878, i16 addrspace(5)* %tmp1358, align 2, !tbaa !28
...
.loopexit: ; preds = %.preheader,
%.loopexit93
%tmp1394 = bitcast [16 x i16] addrspace(5)* %tmp to half addrspace(5)*
%tmp1395 = load half, half addrspace(5)* %tmp1394, align 2, !tbaa !18
%tmp1396 = fpext half %tmp1395 to float
call void @chfang(float %tmp1396)
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