1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -instcombine %s -o - | FileCheck %s
4 ; All the "useless" instructions should be removed and we shouldn't crash.
6 target datalayout = "p:16:16"
10 @a = external global i16
11 @b = external global i16*
16 ; CHECK-NEXT: [[TMP12:%.*]] = alloca [2 x i32], align 8
17 ; CHECK-NEXT: [[TMP12_SUB:%.*]] = getelementptr inbounds [2 x i32], [2 x i32]* [[TMP12]], i16 0, i16 0
18 ; CHECK-NEXT: br i1 undef, label [[BB1:%.*]], label [[BB2:%.*]]
20 ; CHECK-NEXT: [[TMP8:%.*]] = ptrtoint [2 x i32]* [[TMP12]] to i16
21 ; CHECK-NEXT: store i16 [[TMP8]], i16* @a, align 2
22 ; CHECK-NEXT: unreachable
24 ; CHECK-NEXT: [[TMP9:%.*]] = load i16*, i16** @b, align 2
25 ; CHECK-NEXT: store i16 0, i16* [[TMP9]], align 2
26 ; CHECK-NEXT: [[TMP10:%.*]] = load i32, i32* [[TMP12_SUB]], align 8
27 ; CHECK-NEXT: [[TMP11:%.*]] = add i32 [[TMP10]], -1
28 ; CHECK-NEXT: store i32 [[TMP11]], i32* [[TMP12_SUB]], align 8
29 ; CHECK-NEXT: ret void
33 %tmp2 = bitcast %i64_t* %tmp1 to i32*
34 %useless3 = bitcast %i64_t* %tmp1 to i16*
35 %useless4 = getelementptr inbounds i16, i16* %useless3, i16 undef
36 %useless5 = bitcast i16* %useless4 to i32*
37 br i1 undef, label %bb1, label %bb2
40 %useless6 = insertvalue [1 x i32*] undef, i32* %tmp2, 0
41 %useless7 = insertvalue [1 x i32*] %useless6, i32* null, 0
42 %tmp8 = ptrtoint i32* %tmp2 to i16
43 store i16 %tmp8, i16* @a
47 %tmp9 = load i16*, i16** @b
48 store i16 0, i16* %tmp9
49 %tmp10 = load i32, i32* %tmp2
50 %tmp11 = sub i32 %tmp10, 1
51 store i32 %tmp11, i32* %tmp2