[X86] Prevent assertion when calling a function that returns double with -mno-sse2...

As seen in the most recent updates to PR10498

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@372197 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/CodeGen/x86_64-mno-sse2.c b/test/CodeGen/x86_64-mno-sse2.c
new file mode 100644 (file)
index 0000000..0c8e78e
--- /dev/null
+++ b/test/CodeGen/x86_64-mno-sse2.c
@@ -0,0 +1,20 @@
+// RUN: %clang_cc1 -triple x86_64-linux -target-feature -sse2 -S -o /dev/null -verify %s
+// REQUIRES: x86-registered-target
+
+double f1(void) { // expected-error {{SSE2 register return with SSE2 disabled}}
+  return 1.4;
+}
+extern double g;
+void f2(void) { // expected-error {{SSE2 register return with SSE2 disabled}}
+  g = f1();
+}
+void take_double(double);
+void pass_double(void) {
+  // FIXME: Still asserts.
+  //take_double(1.5);
+}
+
+double return_double();
+void call_double(double *a) { // expected-error {{SSE2 register return with SSE2 disabled}}
+  *a = return_double();
+}