Create an explicit copy for byval parameters even

when inlining a readonly function.

llvm-svn: 46393

1 files changed, 19 insertions, 0 deletions

diff --git a/llvm/test/CFrontend/2008-01-26-ReadOnlyByVal.c b/llvm/test/CFrontend/2008-01-26-ReadOnlyByVal.c
new file mode 100644
index 00000000000..cea6d1e1522
--- /dev/null
+++ b/llvm/test/CFrontend/2008-01-26-ReadOnlyByVal.c
@@ -0,0 +1,19 @@
+// RUN: %llvmgcc %s -S -O1 -o - | llvm-as | opt -std-compile-opts | llvm-dis | not grep add
+
+struct S { int A; int B; int C; int D; };
+
+int f(struct S x) __attribute__ ((const));
+
+static int __attribute__ ((const)) g(struct S x) {
+	x.A = x.B;
+	return f(x);
+}
+
+int h(void) {
+	struct S x;
+	int r;
+	x.A = 0;
+	x.B = 9;
+	r = g(x);
+	return r + x.A;
+}