1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; RUN: opt -S -instcombine -instcombine-infinite-loop-threshold=2 < %s | FileCheck %s
4 ; This used to require 10 instcombine iterations to fully optimize.
5 ; The number of iterations grew linearly with the number of DSEd stores,
6 ; resulting in overall quadratic runtime.
8 %struct.S3 = type { i64 }
10 @csmith_sink_ = dso_local global i64 0, align 1
11 @g_302_7 = internal constant i32 0, align 1
12 @g_313_0 = internal global i16 0, align 1
13 @g_313_1 = internal global i32 0, align 1
14 @g_313_2 = internal global i32 0, align 1
15 @g_313_3 = internal global i32 0, align 1
16 @g_313_4 = internal global i16 0, align 1
17 @g_313_5 = internal global i16 0, align 1
18 @g_313_6 = internal global i16 0, align 1
19 @g_316 = internal global %struct.S3 zeroinitializer, align 1
20 @g_316_1_0 = internal global i16 0, align 1
25 ; CHECK-NEXT: store i64 0, i64* @csmith_sink_, align 8
26 ; CHECK-NEXT: ret i16 0
29 store i64 0, i64* @csmith_sink_, align 1
30 %0 = load i16, i16* @g_313_0, align 1
31 %conv2 = sext i16 %0 to i64
32 store i64 %conv2, i64* @csmith_sink_, align 1
33 %1 = load i32, i32* @g_313_1, align 1
34 %conv3 = zext i32 %1 to i64
35 store i64 %conv3, i64* @csmith_sink_, align 1
36 %2 = load i32, i32* @g_313_2, align 1
37 %conv4 = sext i32 %2 to i64
38 store i64 %conv4, i64* @csmith_sink_, align 1
39 %3 = load i32, i32* @g_313_3, align 1
40 %conv5 = zext i32 %3 to i64
41 store i64 %conv5, i64* @csmith_sink_, align 1
42 %4 = load i16, i16* @g_313_4, align 1
43 %conv6 = sext i16 %4 to i64
44 store i64 %conv6, i64* @csmith_sink_, align 1
45 %5 = load i16, i16* @g_313_5, align 1
46 %conv7 = sext i16 %5 to i64
47 store i64 %conv7, i64* @csmith_sink_, align 1
48 %6 = load i16, i16* @g_313_6, align 1
49 %conv8 = sext i16 %6 to i64
50 store i64 %conv8, i64* @csmith_sink_, align 1
51 %7 = load i64, i64* getelementptr inbounds (%struct.S3, %struct.S3* @g_316, i32 0, i32 0), align 1
52 store i64 %7, i64* @csmith_sink_, align 1
53 %8 = load i16, i16* @g_316_1_0, align 1
54 %conv9 = sext i16 %8 to i64
55 store i64 %conv9, i64* @csmith_sink_, align 1
56 store i64 0, i64* @csmith_sink_, align 1