https://bugs.llvm.org/show_bug.cgi?id=50057
Bug ID: 50057
Summary: Cannot select: t10: i64 = AArch64ISD::VSHL t2,
Constant:i32<2>
Product: libraries
Version: trunk
Hardware: PC
OS: Linux
Status: NEW
Severity: normal
Priority: P
Component: Backend: AArch64
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected],
[email protected], [email protected],
[email protected]
$ cat test.ll
define i64 @foo(i64 %0) {
%2 = tail call i64 @llvm.aarch64.neon.ushl.i64(i64 %0, i64 2)
ret i64 %2
}
declare i64 @llvm.aarch64.neon.ushl.i64(i64, i64)
$ llc -march=aarch64 test.ll
LLVM ERROR: Cannot select: t10: i64 = AArch64ISD::VSHL t2, Constant:i32<2>
t2: i64,ch = CopyFromReg t0, Register:i64 %0
t1: i64 = Register %0
t9: i32 = Constant<2>
In function: foo
This IR is produced by calling the vshld_u64 NEON intrinsic from Clang. The
error only happens if the second argument (the shift) is a constant.
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