1 files changed, 43 insertions, 0 deletions
diff --git a/test/Transforms/InstMerge/st_sink_no_barrier_load.ll b/test/Transforms/InstMerge/st_sink_no_barrier_load.ll
new file mode 100644
index 0000000..5be0c25
--- /dev/null
+++ b/test/Transforms/InstMerge/st_sink_no_barrier_load.ll
@@ -0,0 +1,43 @@
+; Test to make sure that stores in a diamond get merged with a non barrier load after the store instruction
+; Stores sunks into the footer.
+; RUN: opt -basicaa -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* %r, i64 0, i32 2
+  %node.017 = load %struct.node** %node.0.in16, align 8
+  %index.addr = alloca i32, align 4
+  store i32 %index, i32* %index.addr, align 4
+  %0 = load 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* %index.addr, align 4
+  %p1 = getelementptr inbounds %struct.node* %node.017, i32 0, i32 6
+  ; CHECK-NOT: store i32
+  store i32 %1, i32* %p1, align 4
+  %p2 = getelementptr inbounds %struct.node* %node.017, i32 5, i32 6
+  ; CHECK: load i32*
+  %not_barrier = load i32 * %p2, align 4
+  br label %if.end
+
+; CHECK: if.else
+if.else:                                          ; preds = %entry
+  %2 = load i32* %index.addr, align 4
+  %add = add nsw i32 %2, 1
+  %p3 = getelementptr inbounds %struct.node* %node.017, i32 0, i32 6
+  ; CHECK-NOT: store i32
+  store i32 %add, i32* %p3, align 4
+  br label %if.end
+
+; CHECK: if.end
+if.end:                                           ; preds = %if.else, %if.then
+; CHECK: store
+  ret void
+}