Rebased PNaCl localmods in LLVM to 223109

test/Transforms/NaCl/expand-varargs-attrs.ll

Index: test/Transforms/NaCl/expand-varargs-attrs.ll
diff --git a/test/Transforms/NaCl/expand-varargs-attrs.ll b/test/Transforms/NaCl/expand-varargs-attrs.ll
new file mode 100644
index 0000000000000000000000000000000000000000..d95a572d6b2cf70ecd8b494a3f8b99d55379e5d7
--- /dev/null
+++ b/test/Transforms/NaCl/expand-varargs-attrs.ll
@@ -0,0 +1,72 @@
+; RUN: opt < %s -expand-varargs -S | FileCheck %s
+
+declare i32 @varargs_func(i32 %arg, ...)
+
+
+; Check that attributes such as "byval" are preserved on fixed arguments.
+
+%MyStruct = type { i64, i64 }
+
+define void @func_with_arg_attrs(%MyStruct* byval, ...) {
+  ret void
+}
+; CHECK: define void @func_with_arg_attrs(%MyStruct* byval, i8* noalias %varargs) {
+
+
+declare void @take_struct_arg(%MyStruct* byval %s, ...)
+
+define void @call_with_arg_attrs(%MyStruct* %s) {
+  call void (%MyStruct*, ...)* @take_struct_arg(%MyStruct* byval %s)
+  ret void
+}
+; CHECK: define void @call_with_arg_attrs(%MyStruct* %s) {
+; CHECK: call void %vararg_func(%MyStruct* byval %s, <{ i32 }>* %vararg_buffer)
+
+
+; The "byval" attribute here should be dropped.
+define i32 @pass_struct_via_vararg1(%MyStruct* %s) {
+  %result = call i32 (i32, ...)* @varargs_func(i32 111, %MyStruct* byval %s)
+  ret i32 %result
+}
+; CHECK: define i32 @pass_struct_via_vararg1(%MyStruct* %s) {
+; CHECK: %result = call i32 %vararg_func(i32 111, <{ %MyStruct }>* %vararg_buffer)
+
+
+; The "byval" attribute here should be dropped.
+define i32 @pass_struct_via_vararg2(%MyStruct* %s) {
+  %result = call i32 (i32, ...)* @varargs_func(i32 111, i32 2, %MyStruct* byval %s)
+  ret i32 %result
+}
+; CHECK: define i32 @pass_struct_via_vararg2(%MyStruct* %s) {
+; CHECK: %result = call i32 %vararg_func(i32 111, <{ i32, %MyStruct }>* %vararg_buffer)
+
+
+; Check that return attributes such as "signext" are preserved.
+define i32 @call_with_return_attr() {
+  %result = call signext i32 (i32, ...)* @varargs_func(i32 111, i64 222)
+  ret i32 %result
+}
+; CHECK: define i32 @call_with_return_attr() {
+; CHECK: %result = call signext i32 %vararg_func(i32 111
+
+
+; Check that the "readonly" function attribute is preserved.
+define i32 @call_readonly() {
+  %result = call i32 (i32, ...)* @varargs_func(i32 111, i64 222) readonly
+  ret i32 %result
+}
+; CHECK: define i32 @call_readonly() {
+; CHECK: %result = call i32 %vararg_func(i32 111, {{.*}}) #1
+
+
+; Check that the "tail" attribute gets removed, because the callee
+; reads space alloca'd by the caller.
+define i32 @tail_call() {
+  %result = tail call i32 (i32, ...)* @varargs_func(i32 111, i64 222)
+  ret i32 %result
+}
+; CHECK: define i32 @tail_call() {
+; CHECK: %result = call i32 %vararg_func(i32 111
+
+
+; CHECK: attributes #1 = { readonly }