1 files changed, 84 insertions, 0 deletions
diff --git a/test/Transforms/InstMerge/ld_hoist_st_sink.ll b/test/Transforms/InstMerge/ld_hoist_st_sink.ll
new file mode 100644
index 0000000..978160a
--- /dev/null
+++ b/test/Transforms/InstMerge/ld_hoist_st_sink.ll
@@ -0,0 +1,84 @@
+; Tests to make sure that loads and stores in a diamond get merged
+; Loads are hoisted into the header. 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 { i64, %struct.node*, %struct.node*, %struct.node*, i64, %struct.arc*, i64, i64, i64 }
+%struct.arc = type { i64, i64, i64 }
+
+define i64 @foo(%struct.node* nocapture readonly %r) nounwind {
+entry:
+  %node.0.in16 = getelementptr inbounds %struct.node* %r, i64 0, i32 2
+  %node.017 = load %struct.node** %node.0.in16, align 8
+  %tobool18 = icmp eq %struct.node* %node.017, null
+  br i1 %tobool18, label %while.end, label %while.body.preheader
+
+; CHECK-LABEL: while.body.preheader
+while.body.preheader:                             ; preds = %entry
+; CHECK: load
+  br label %while.body
+
+while.body:                                       ; preds = %while.body.preheader, %if.end
+  %node.020 = phi %struct.node* [ %node.0, %if.end ], [ %node.017, %while.body.preheader ]
+  %sum.019 = phi i64 [ %inc, %if.end ], [ 0, %while.body.preheader ]
+  %orientation = getelementptr inbounds %struct.node* %node.020, i64 0, i32 4
+  %0 = load i64* %orientation, align 8
+  %cmp = icmp eq i64 %0, 1
+  br i1 %cmp, label %if.then, label %if.else
+; CHECK: if.then
+if.then:                                          ; preds = %while.body
+  %a = getelementptr inbounds %struct.node* %node.020, i64 0, i32 5
+; CHECK-NOT: load %struct.arc
+  %1 = load %struct.arc** %a, align 8
+  %cost = getelementptr inbounds %struct.arc* %1, i64 0, i32 0
+; CHECK-NOT: load i64*
+  %2 = load i64* %cost, align 8
+  %pred = getelementptr inbounds %struct.node* %node.020, i64 0, i32 1
+; CHECK-NOT: load %struct.node**
+  %3 = load %struct.node** %pred, align 8
+  %p = getelementptr inbounds %struct.node* %3, i64 0, i32 6
+; CHECK-NOT: load i64*
+  %4 = load i64* %p, align 8
+  %add = add nsw i64 %4, %2
+  %p1 = getelementptr inbounds %struct.node* %node.020, i64 0, i32 6
+; CHECK-NOT: store i64
+  store i64 %add, i64* %p1, align 8
+  br label %if.end
+
+; CHECK: if.else
+if.else:                                          ; preds = %while.body
+  %pred2 = getelementptr inbounds %struct.node* %node.020, i64 0, i32 1
+; CHECK-NOT: load %struct.node**
+  %5 = load %struct.node** %pred2, align 8
+  %p3 = getelementptr inbounds %struct.node* %5, i64 0, i32 6
+; CHECK-NOT: load i64*
+  %6 = load i64* %p3, align 8
+  %a4 = getelementptr inbounds %struct.node* %node.020, i64 0, i32 5
+; CHECK-NOT: load %struct.arc**
+  %7 = load %struct.arc** %a4, align 8
+  %cost5 = getelementptr inbounds %struct.arc* %7, i64 0, i32 0
+; CHECK-NOT: load i64*
+  %8 = load i64* %cost5, align 8
+  %sub = sub nsw i64 %6, %8
+  %p6 = getelementptr inbounds %struct.node* %node.020, i64 0, i32 6
+; CHECK-NOT: store i64
+  store i64 %sub, i64* %p6, align 8
+  br label %if.end
+
+; CHECK: if.end
+if.end:                                           ; preds = %if.else, %if.then
+; CHECK: store
+  %inc = add nsw i64 %sum.019, 1
+  %node.0.in = getelementptr inbounds %struct.node* %node.020, i64 0, i32 2
+  %node.0 = load %struct.node** %node.0.in, align 8
+  %tobool = icmp eq %struct.node* %node.0, null
+  br i1 %tobool, label %while.end.loopexit, label %while.body
+
+while.end.loopexit:                               ; preds = %if.end
+  %inc.lcssa = phi i64 [ %inc, %if.end ]
+  br label %while.end
+
+while.end:                                        ; preds = %while.end.loopexit, %entry
+  %sum.0.lcssa = phi i64 [ 0, %entry ], [ %inc.lcssa, %while.end.loopexit ]
+  ret i64 %sum.0.lcssa
+}