https://llvm.org/bugs/show_bug.cgi?id=28528
Bug ID: 28528
Summary: Cannot select: intrinsic %llvm.aarch64.neon.sqshrun
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: normal
Priority: P
Component: Backend: AArch64
Assignee: unassignedb...@nondot.org
Reporter: alina.sbir...@gmail.com
CC: llvm-bugs@lists.llvm.org
Classification: Unclassified
Created attachment 16735
--> https://llvm.org/bugs/attachment.cgi?id=16735&action=edit
Test showing the failure.
We've come across this testcase where the following sequence fails to lower
intrinsic sqshrun.
Fulltest attached (llc test_reduced.ll to reproduce).
%tmp1906 = add nsw <8 x i32> undef, undef
%tmp1908 = shufflevector <8 x i32> %tmp1906, <8 x i32> undef, <4 x i32> <i32
0, i32 1, i32 2, i32 3>
%tmp1909 = call <4 x i16> @llvm.aarch64.neon.sqshrun.v4i16(<4 x i32>
%tmp1908, i32 18) #0
%tmp1914 = getelementptr inbounds i16, i16* undef, i64 8
%tmp1915 = bitcast i16* %tmp1914 to <4 x i16>*
store <4 x i16> %tmp1909, <4 x i16>* %tmp1915, align 16
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