https://llvm.org/bugs/show_bug.cgi?id=23979
Bug ID: 23979
Summary: Cannot copy AL to XMMO
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: X86
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Classification: Unclassified
llc with FastISel (-O0) fails to compile the IR for X86 target. Assert fails
with comment: "Cannot copy AL to XMM0. Cannot emit physreg copy instruction."
Test code:
target triple = "x86_64-unknown-linux-gnu"
define <8 x i1> @test() {
%C = icmp ult <8 x i16> zeroinitializer, zeroinitializer
br label %B
B:
%I = insertelement <8 x i1> %C, i1 undef, i32 0
ret <8 x i1> %I
}
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