Imported Upstream version 6.10.0.49

Former-commit-id: 1d6753294b2993e1fbf92de9366bb9544db4189b

external/llvm-project/llvm/test/Transforms/FunctionAttrs/2008-09-03-ReadNone.ll

@@ -0,0 +1,25 @@
+; RUN: opt < %s -basicaa -functionattrs -S | FileCheck %s
+@x = global i32 0
+
+; CHECK: declare i32 @e() #0
+declare i32 @e() readnone
+
+; CHECK: define i32 @f() #0
+define i32 @f() {
+	%tmp = call i32 @e( )		; <i32> [#uses=1]
+	ret i32 %tmp
+}
+
+; CHECK: define i32 @g() #1
+define i32 @g() readonly {
+	ret i32 0
+}
+
+; CHECK: define i32 @h() #1
+define i32 @h() readnone {
+	%tmp = load i32, i32* @x		; <i32> [#uses=1]
+	ret i32 %tmp
+}
+
+; CHECK: attributes #0 = { readnone }
+; CHECK: attributes #1 = { norecurse readnone }