st_sink_with_barrier.ll
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; Test to make sure that load from the same address as a store and appears after the store prevents the store from being sunk
; RUN: opt -basic-aa -memdep -mldst-motion -S < %s | FileCheck %s
target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
%struct.node = type { i32, %struct.node*, %struct.node*, %struct.node*, i32, i32, i32, i32 }
; Function Attrs: nounwind uwtable
define void @sink_store(%struct.node* nocapture %r, i32 %index) {
entry:
%node.0.in16 = getelementptr inbounds %struct.node, %struct.node* %r, i64 0, i32 2
%node.017 = load %struct.node*, %struct.node** %node.0.in16, align 8
%index.addr = alloca i32, align 4
store i32 %index, i32* %index.addr, align 4
%0 = load i32, i32* %index.addr, align 4
%cmp = icmp slt i32 %0, 0
br i1 %cmp, label %if.then, label %if.else
; CHECK: if.then
if.then: ; preds = %entry
%1 = load i32, i32* %index.addr, align 4
%p1 = getelementptr inbounds %struct.node, %struct.node* %node.017, i32 0, i32 6
; CHECK: store i32
store i32 %1, i32* %p1, align 4
%p2 = getelementptr inbounds %struct.node, %struct.node* %node.017, i32 0, i32 6
; CHECK: load i32, i32*
%barrier = load i32 , i32 * %p2, align 4
br label %if.end
; CHECK: if.else
if.else: ; preds = %entry
%2 = load i32, i32* %index.addr, align 4
%add = add nsw i32 %2, 1
%p3 = getelementptr inbounds %struct.node, %struct.node* %node.017, i32 0, i32 6
; CHECK: store i32
store i32 %add, i32* %p3, align 4
br label %if.end
; CHECK: if.end
if.end: ; preds = %if.else, %if.then
; CHECK-NOT: store
ret void
}