xref: /llvm-project/llvm/test/Analysis/MemorySSA/optimize-use.ll (revision f96ea53e892e0dfc1ee778868c1ed33616b95a82)
1; RUN: opt -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s --check-prefixes=CHECK,NOLIMIT
2; RUN: opt -memssa-check-limit=0 -aa-pipeline=basic-aa -passes='print<memoryssa>,verify<memoryssa>' -disable-output < %s 2>&1 | FileCheck %s --check-prefixes=CHECK,LIMIT
3
4; Function Attrs: ssp uwtable
5define i32 @main() {
6entry:
7; CHECK: 1 = MemoryDef(liveOnEntry)
8; CHECK-NEXT:   %call = call noalias i8* @_Znwm(i64 4)
9  %call = call noalias i8* @_Znwm(i64 4)
10  %0 = bitcast i8* %call to i32*
11; CHECK: 2 = MemoryDef(1)
12; CHECK-NEXT:   %call1 = call noalias i8* @_Znwm(i64 4)
13  %call1 = call noalias i8* @_Znwm(i64 4)
14  %1 = bitcast i8* %call1 to i32*
15; CHECK: 3 = MemoryDef(2)
16; CHECK-NEXT:   store i32 5, i32* %0, align 4
17  store i32 5, i32* %0, align 4
18; CHECK: 4 = MemoryDef(3)
19; CHECK-NEXT:   store i32 7, i32* %1, align 4
20  store i32 7, i32* %1, align 4
21; NOLIMIT: MemoryUse(3)
22; NOLIMIT-NEXT:   %2 = load i32, i32* %0, align 4
23; LIMIT: MemoryUse(4)
24; LIMIT-NEXT:   %2 = load i32, i32* %0, align 4
25  %2 = load i32, i32* %0, align 4
26; NOLIMIT: MemoryUse(4)
27; NOLIMIT-NEXT:   %3 = load i32, i32* %1, align 4
28; LIMIT: MemoryUse(4)
29; LIMIT-NEXT:   %3 = load i32, i32* %1, align 4
30  %3 = load i32, i32* %1, align 4
31; NOLIMIT: MemoryUse(3)
32; NOLIMIT-NEXT:   %4 = load i32, i32* %0, align 4
33; LIMIT: MemoryUse(4)
34; LIMIT-NEXT:   %4 = load i32, i32* %0, align 4
35  %4 = load i32, i32* %0, align 4
36; NOLIMIT: MemoryUse(4)
37; NOLIMIT-NEXT:   %5 = load i32, i32* %1, align 4
38; LIMIT: MemoryUse(4)
39; LIMIT-NEXT:   %5 = load i32, i32* %1, align 4
40  %5 = load i32, i32* %1, align 4
41  %add = add nsw i32 %3, %5
42  ret i32 %add
43}
44
45
46declare noalias i8* @_Znwm(i64)
47