https://bugs.llvm.org/show_bug.cgi?id=38031
Bug ID: 38031
Summary: Unsupported ARM Neon intrinsics in Target-specific DAG
combine function for VLDDUP
Product: tools
Version: trunk
Hardware: Other
OS: Linux
Status: NEW
Keywords: compile-fail, crash-on-invalid
Severity: normal
Priority: P
Component: llc
Assignee: ikosa...@accesssoftek.com
Reporter: diogo.samp...@arm.com
CC: llvm-bugs@lists.llvm.org, sjoerd.mei...@arm.com
Created attachment 20511
--> https://bugs.llvm.org/attachment.cgi?id=20511&action=edit
LLVM IR that generates crash-on-invalid
The new VLDDUP operations inserted in https://reviews.llvm.org/D48439
are not handled in the target-specific DAG combine function.
ARMISelLowering.cpp::11443 - CombineBaseUpdate
How to reproduce:
llc -debug < problem-9bb6ba.ll
Combining: t637: ch = TokenFactor t635:3, t636:3
Combining: t636: v4i16,v4i16,v4i16,ch = llvm.arm.neon.vld3lane<(load 24 from
%ir.32, align 2)> t634, TargetConstant:i32<1048>, FrameIndex:i32<32>, t635,
t635:1, t635:2, Constant:i32<0>, Constant:i32<2>
Combining: t635: v4i16,v4i16,v4i16,ch = llvm.arm.neon.vld3dup<(load 24 from
%ir.33, align 2)> t634, TargetConstant:i32<1047>, FrameIndex:i32<33>,
Constant:i32<2>
unexpected intrinsic for Neon base update
UNREACHABLE executed at
/work/bf/LLVM/local/src/lib/Target/ARM/ARMISelLowering.cpp:11483!
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