1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
2 ; Checks that move-auto-init can move instruction passed unclobbering memory
4 ; RUN: opt < %s -S -passes='move-auto-init' -verify-memoryssa | FileCheck %s
6 target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
8 define i32 @foo(i32 noundef %0, i32 noundef %1, i32 noundef %2) #0 {
10 ; CHECK-NEXT: [[TMP4:%.*]] = alloca [100 x i8], align 16
11 ; CHECK-NEXT: [[TMP5:%.*]] = alloca [2 x i8], align 1
12 ; CHECK-NEXT: [[TMP6:%.*]] = getelementptr inbounds [100 x i8], ptr [[TMP4]], i64 0, i64 0
13 ; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 100, ptr nonnull [[TMP6]]) #[[ATTR3:[0-9]+]]
14 ; CHECK-NEXT: [[TMP7:%.*]] = getelementptr inbounds [2 x i8], ptr [[TMP5]], i64 0, i64 0
15 ; CHECK-NEXT: call void @llvm.lifetime.start.p0(i64 2, ptr nonnull [[TMP7]]) #[[ATTR3]]
16 ; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds [2 x i8], ptr [[TMP5]], i64 0, i64 1
17 ; CHECK-NEXT: [[TMP9:%.*]] = icmp eq i32 [[TMP1:%.*]], 0
18 ; CHECK-NEXT: br i1 [[TMP9]], label [[TMP15:%.*]], label [[TMP10:%.*]]
20 ; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(100) [[TMP6]], i8 -86, i64 100, i1 false), !annotation !0
21 ; CHECK-NEXT: [[TMP11:%.*]] = sext i32 [[TMP0:%.*]] to i64
22 ; CHECK-NEXT: [[TMP12:%.*]] = getelementptr inbounds [100 x i8], ptr [[TMP4]], i64 0, i64 [[TMP11]]
23 ; CHECK-NEXT: store i8 12, ptr [[TMP12]], align 1
24 ; CHECK-NEXT: [[TMP13:%.*]] = load i8, ptr [[TMP6]], align 16
25 ; CHECK-NEXT: [[TMP14:%.*]] = sext i8 [[TMP13]] to i32
26 ; CHECK-NEXT: br label [[TMP22:%.*]]
28 ; CHECK-NEXT: [[TMP16:%.*]] = icmp eq i32 [[TMP2:%.*]], 0
29 ; CHECK-NEXT: br i1 [[TMP16]], label [[TMP22]], label [[TMP17:%.*]]
31 ; CHECK-NEXT: store i8 -86, ptr [[TMP7]], align 1, !annotation !0
32 ; CHECK-NEXT: store i8 -86, ptr [[TMP8]], align 1, !annotation !0
33 ; CHECK-NEXT: [[TMP18:%.*]] = sext i32 [[TMP0]] to i64
34 ; CHECK-NEXT: [[TMP19:%.*]] = getelementptr inbounds [2 x i8], ptr [[TMP5]], i64 0, i64 [[TMP18]]
35 ; CHECK-NEXT: store i8 12, ptr [[TMP19]], align 1
36 ; CHECK-NEXT: [[TMP20:%.*]] = load i8, ptr [[TMP7]], align 1
37 ; CHECK-NEXT: [[TMP21:%.*]] = sext i8 [[TMP20]] to i32
38 ; CHECK-NEXT: br label [[TMP22]]
40 ; CHECK-NEXT: [[TMP23:%.*]] = phi i32 [ [[TMP14]], [[TMP10]] ], [ [[TMP21]], [[TMP17]] ], [ 0, [[TMP15]] ]
41 ; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 2, ptr nonnull [[TMP7]]) #[[ATTR3]]
42 ; CHECK-NEXT: call void @llvm.lifetime.end.p0(i64 100, ptr nonnull [[TMP6]]) #[[ATTR3]]
43 ; CHECK-NEXT: ret i32 [[TMP23]]
46 %4 = alloca [100 x i8], align 16
47 %5 = alloca [2 x i8], align 1
48 %6 = getelementptr inbounds [100 x i8], ptr %4, i64 0, i64 0
49 call void @llvm.lifetime.start.p0(i64 100, ptr nonnull %6) #3
50 ; This memset must move.
51 call void @llvm.memset.p0.i64(ptr noundef nonnull align 16 dereferenceable(100) %6, i8 -86, i64 100, i1 false), !annotation !0
52 %7 = getelementptr inbounds [2 x i8], ptr %5, i64 0, i64 0
53 call void @llvm.lifetime.start.p0(i64 2, ptr nonnull %7) #3
54 ; This store must move.
55 store i8 -86, ptr %7, align 1, !annotation !0
56 %8 = getelementptr inbounds [2 x i8], ptr %5, i64 0, i64 1
57 ; This store must move.
58 store i8 -86, ptr %8, align 1, !annotation !0
59 %9 = icmp eq i32 %1, 0
60 br i1 %9, label %15, label %10
63 %11 = sext i32 %0 to i64
64 %12 = getelementptr inbounds [100 x i8], ptr %4, i64 0, i64 %11
65 store i8 12, ptr %12, align 1
66 %13 = load i8, ptr %6, align 16
67 %14 = sext i8 %13 to i32
71 %16 = icmp eq i32 %2, 0
72 br i1 %16, label %22, label %17
75 %18 = sext i32 %0 to i64
76 %19 = getelementptr inbounds [2 x i8], ptr %5, i64 0, i64 %18
77 store i8 12, ptr %19, align 1
78 %20 = load i8, ptr %7, align 1
79 %21 = sext i8 %20 to i32
83 %23 = phi i32 [ %14, %10 ], [ %21, %17 ], [ 0, %15 ]
84 call void @llvm.lifetime.end.p0(i64 2, ptr nonnull %7) #3
85 call void @llvm.lifetime.end.p0(i64 100, ptr nonnull %6) #3
89 declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #1
91 declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg) #2
93 declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #1
95 attributes #0 = { mustprogress nofree nosync nounwind readnone uwtable willreturn }
96 attributes #1 = { argmemonly mustprogress nofree nosync nounwind willreturn }
97 attributes #2 = { argmemonly mustprogress nofree nounwind willreturn writeonly }
98 attributes #3 = { nounwind }