Move library call prototype attribute inference to functionattrs
The simplify-libcalls pass implemented a doInitialization hook to infer
function prototype attributes for well-known functions. Given that the
simplify-libcalls pass is going away *and* that the functionattrs pass
is already in place to deduce function attributes, I am moving this logic
to the functionattrs pass. This approach was discussed during patch
review:
http://lists.cs.uiuc.edu/pipermail/llvm-commits/Week-of-Mon-20121126/157465.html.
llvm-svn: 177619
diff --git a/llvm/test/Transforms/FunctionAttrs/2009-01-04-Annotate.ll b/llvm/test/Transforms/FunctionAttrs/2009-01-04-Annotate.ll
new file mode 100644
index 0000000..d414b73
--- /dev/null
+++ b/llvm/test/Transforms/FunctionAttrs/2009-01-04-Annotate.ll
@@ -0,0 +1,21 @@
+; RUN: opt < %s -functionattrs -S | FileCheck %s
+
+; CHECK: declare noalias i8* @fopen(i8* nocapture, i8* nocapture) #0
+declare i8* @fopen(i8*, i8*)
+
+; CHECK: declare i8 @strlen(i8* nocapture) #1
+declare i8 @strlen(i8*)
+
+; CHECK: declare noalias i32* @realloc(i32* nocapture, i32) #0
+declare i32* @realloc(i32*, i32)
+
+; Test deliberately wrong declaration
+declare i32 @strcpy(...)
+
+; CHECK-NOT: strcpy{{.*}}noalias
+; CHECK-NOT: strcpy{{.*}}nocapture
+; CHECK-NOT: strcpy{{.*}}nounwind
+; CHECK-NOT: strcpy{{.*}}readonly
+
+; CHECK: attributes #0 = { nounwind }
+; CHECK: attributes #1 = { nounwind readonly }