1 files changed, 112 insertions, 0 deletions
diff --git a/test/Transforms/Sink/call.ll b/test/Transforms/Sink/call.ll
new file mode 100644
index 0000000000000..5aaad4499f59a
--- /dev/null
+++ b/test/Transforms/Sink/call.ll
@@ -0,0 +1,112 @@
+; RUN: opt < %s -basicaa -sink -S | FileCheck %s
+
+declare i32 @f_load_global() nounwind readonly
+declare i32 @f_load_arg(i32*) nounwind readonly argmemonly
+declare void @f_store_global(i32) nounwind
+declare void @f_store_arg(i32*) nounwind argmemonly
+declare void @f_readonly_arg(i32* readonly, i32*) nounwind argmemonly
+declare i32 @f_readnone(i32) nounwind readnone
+
+@A = external global i32
+@B = external global i32
+
+; Sink readonly call if no stores are in the way.
+;
+; CHECK-LABEL: @test_sink_no_stores(
+; CHECK: true:
+; CHECK-NEXT: %l = call i32 @f_load_global
+; CHECK-NEXT: ret i32 %l
+define i32 @test_sink_no_stores(i1 %z) {
+  %l = call i32 @f_load_global()
+  br i1 %z, label %true, label %false
+true:
+  ret i32 %l
+false:
+  ret i32 0
+}
+
+; CHECK-LABEL: @test_sink_argmem_store(
+; CHECK: true:
+; CHECK-NEXT: %l = call i32 @f_load_arg
+; CHECK-NEXT: ret i32 %l
+define i32 @test_sink_argmem_store(i1 %z) {
+  %l = call i32 @f_load_arg(i32* @A)
+  store i32 0, i32* @B
+  br i1 %z, label %true, label %false
+true:
+  ret i32 %l
+false:
+  ret i32 0
+}
+
+; CHECK-LABEL: @test_sink_argmem_call(
+; CHECK: true:
+; CHECK-NEXT: %l = call i32 @f_load_arg
+; CHECK-NEXT: ret i32 %l
+define i32 @test_sink_argmem_call(i1 %z) {
+  %l = call i32 @f_load_arg(i32* @A)
+  call void @f_store_arg(i32* @B)
+  br i1 %z, label %true, label %false
+true:
+  ret i32 %l
+false:
+  ret i32 0
+}
+
+; CHECK-LABEL: @test_sink_argmem_multiple(
+; CHECK: true:
+; CHECK-NEXT: %l = call i32 @f_load_arg
+; CHECK-NEXT: ret i32 %l
+define i32 @test_sink_argmem_multiple(i1 %z) {
+  %l = call i32 @f_load_arg(i32* @A)
+  call void @f_readonly_arg(i32* @A, i32* @B)
+  br i1 %z, label %true, label %false
+true:
+  ret i32 %l
+false:
+  ret i32 0
+}
+
+; But don't sink if there is a store.
+;
+; CHECK-LABEL: @test_nosink_store(
+; CHECK: call i32 @f_load_global
+; CHECK-NEXT: store i32
+define i32 @test_nosink_store(i1 %z) {
+  %l = call i32 @f_load_global()
+  store i32 0, i32* @A
+  br i1 %z, label %true, label %false
+true:
+  ret i32 %l
+false:
+  ret i32 0
+}
+
+; CHECK-LABEL: @test_nosink_call(
+; CHECK: call i32 @f_load_global
+; CHECK-NEXT: call void @f_store_global
+define i32 @test_nosink_call(i1 %z) {
+  %l = call i32 @f_load_global()
+  call void @f_store_global(i32 0)
+  br i1 %z, label %true, label %false
+true:
+  ret i32 %l
+false:
+  ret i32 0
+}
+
+; readnone calls are sunk across stores.
+;
+; CHECK-LABEL: @test_sink_readnone(
+; CHECK: true:
+; CHECK-NEXT: %l = call i32 @f_readnone(
+; CHECK-NEXT: ret i32 %l
+define i32 @test_sink_readnone(i1 %z) {
+  %l = call i32 @f_readnone(i32 0)
+  store i32 0, i32* @A
+  br i1 %z, label %true, label %false
+true:
+  ret i32 %l
+false:
+  ret i32 0
+}