https://llvm.org/bugs/show_bug.cgi?id=30614
Bug ID: 30614
Summary: [i686, pre-SSE41] vec3 type legalization fails for
zero_extend_vector_inreg
Product: new-bugs
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: new bugs
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected], [email protected],
[email protected]
Classification: Unclassified
The following IR fails type legalization:
$ cat < vec3-zext.ll
define <3 x i16> @_Z14convert_short3Dv3_h(<3 x i8>) local_unnamed_addr #6 {
%2 = zext <3 x i8> %0 to <3 x i16>
ret <3 x i16> %2
}
$ llc -mtriple=i686-android-linux vec3-zext.ll -O 3 -mcpu=atom
pirama@pirama:XX:llvm-build$ llc -mtriple=i686-android-linux ext.ll -O 3
-mcpu=atom
PromoteIntegerResult #0: t29: v4i16 = zero_extend_vector_inreg t28
Do not know how to promote this operator!
UNREACHABLE executed at
/ssd1/pirama/llvm-upstream/llvm/lib/CodeGen/SelectionDAG/LegalizeIntegerTypes.cpp:51!
This was introduced in r264062 where zero_extend changed to
zero_extend_vector_inreg during DAG combine.
I'll add the relevant legalization hooks to make this test pass.
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