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 3 target 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 8 define void @sink_store(%struct.node* nocapture %r, i32 %index) { 9 entry: 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 19 if.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 30 if.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 39 if.end: ; preds = %if.else, %if.then 40 ; CHECK-NOT: store 41 ret void 42 } 43
