1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
; RUN: llc < %s -march=x86-64 -mattr=+sse2 | FileCheck %s
; This test makes sure that the compiler does not crash with an
; assertion failure when trying to fold a vector shift left
; by immediate count if the type of the input vector is different
; to the result type.
;
; This happens for example when lowering a shift left of a MVT::v16i8 vector.
; This is custom lowered into the following sequence:
; count << 5
; A = VSHLI(MVT::v8i16, r & (char16)15, 4)
; B = BITCAST MVT::v16i8, A
; VSELECT(r, B, count);
; count += count
; C = VSHLI(MVT::v8i16, r & (char16)63, 2)
; D = BITCAST MVT::v16i8, C
; r = VSELECT(r, C, count);
; count += count
; VSELECT(r, r+r, count);
; count = count << 5;
;
; Where 'r' is a vector of type MVT::v16i8, and
; 'count' is the vector shift count.
define <16 x i8> @do_not_crash(i8*, i32*, i64*, i32, i64, i8) {
entry:
store i8 %5, i8* %0
%L5 = load i8* %0
%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
%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
ret <16 x i8> %B51
}
; CHECK-LABEL: do_not_crash
; CHECK: ret
|
