1 ; RUN: llc < %s -mcpu=corei7 -march=x86-64 -mattr=+sse2 | FileCheck %s
3 ; This test makes sure that the compiler does not crash with an
4 ; assertion failure when trying to fold a vector shift left
5 ; by immediate count if the type of the input vector is different
8 ; This happens for example when lowering a shift left of a MVT::v16i8 vector.
9 ; This is custom lowered into the following sequence:
11 ; A = VSHLI(MVT::v8i16, r & (char16)15, 4)
12 ; B = BITCAST MVT::v16i8, A
13 ; VSELECT(r, B, count);
15 ; C = VSHLI(MVT::v8i16, r & (char16)63, 2)
16 ; D = BITCAST MVT::v16i8, C
17 ; r = VSELECT(r, C, count);
19 ; VSELECT(r, r+r, count);
22 ; Where 'r' is a vector of type MVT::v16i8, and
23 ; 'count' is the vector shift count.
25 define <16 x i8> @do_not_crash(i8*, i32*, i64*, i32, i64, i8) {
29 %I8 = insertelement <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>, i8 %L5, i32 7
30 %B51 = shl <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>, %I8
34 ; CHECK-LABEL: do_not_crash