• Home
  • Line#
  • Scopes#
  • Navigate#
  • Raw
  • Download
1; Test to make sure that load from the same address as a store and appears after the store prevents the store from being sunk
2; RUN: opt -basicaa -memdep -mldst-motion -S < %s | FileCheck %s
3target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
4
5%struct.node = type { i32, %struct.node*, %struct.node*, %struct.node*, i32, i32, i32, i32 }
6
7; Function Attrs: nounwind uwtable
8define void @sink_store(%struct.node* nocapture %r, i32 %index) {
9entry:
10  %node.0.in16 = getelementptr inbounds %struct.node, %struct.node* %r, i64 0, i32 2
11  %node.017 = load %struct.node*, %struct.node** %node.0.in16, align 8
12  %index.addr = alloca i32, align 4
13  store i32 %index, i32* %index.addr, align 4
14  %0 = load i32, i32* %index.addr, align 4
15  %cmp = icmp slt i32 %0, 0
16  br i1 %cmp, label %if.then, label %if.else
17
18; CHECK: if.then
19if.then:                                          ; preds = %entry
20  %1 = load i32, i32* %index.addr, align 4
21  %p1 = getelementptr inbounds %struct.node, %struct.node* %node.017, i32 0, i32 6
22  ; CHECK: store i32
23  store i32 %1, i32* %p1, align 4
24  %p2 = getelementptr inbounds %struct.node, %struct.node* %node.017, i32 0, i32 6
25  ; CHECK: load i32, i32*
26  %barrier = load i32 , i32 * %p2, align 4
27  br label %if.end
28
29; CHECK: if.else
30if.else:                                          ; preds = %entry
31  %2 = load i32, i32* %index.addr, align 4
32  %add = add nsw i32 %2, 1
33  %p3 = getelementptr inbounds %struct.node, %struct.node* %node.017, i32 0, i32 6
34  ; CHECK: store i32
35  store i32 %add, i32* %p3, align 4
36  br label %if.end
37
38; CHECK: if.end
39if.end:                                           ; preds = %if.else, %if.then
40; CHECK-NOT: store
41  ret void
42}
43