https://bugs.llvm.org/show_bug.cgi?id=47534
Bug ID: 47534
Summary: Big shuffle crashes X86 backend
Product: libraries
Version: trunk
Hardware: PC
OS: All
Status: NEW
Severity: enhancement
Priority: P
Component: Backend: X86
Assignee: unassignedb...@nondot.org
Reporter: benny....@gmail.com
CC: craig.top...@gmail.com, llvm-bugs@lists.llvm.org,
llvm-...@redking.me.uk, spatel+l...@rotateright.com
Created attachment 23964
--> https://bugs.llvm.org/attachment.cgi?id=23964&action=edit
reduced test case
$ llc < bugpoint-reduced-simplified.ll -mcpu=skylake-avx512
llc: llvm/lib/Target/X86/X86ISelLowering.cpp:10987: unsigned int
getV4X86ShuffleImm(ArrayRef<int>): Assertion `Mask[1] >= -1 && Mask[1] < 4 &&
"Out of bound mask element!"' failed.
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