Wired-up the new LLVM diagnostic system into clang diagnostic system.

The approach is similar to the existing inline-asm reporting, just more
general.

<rdar://problem/15886278>

llvm-svn: 200931

1 files changed, 34 insertions, 0 deletions

diff --git a/clang/test/Frontend/backend-diagnostic.c b/clang/test/Frontend/backend-diagnostic.c
new file mode 100644
index 00000000000..acb15f27d1a
--- /dev/null
+++ b/clang/test/Frontend/backend-diagnostic.c
@@ -0,0 +1,34 @@
+// REQUIRES: x86-registered-target
+// Play around with backend reporting:
+// _REGULAR_: Regular behavior, no warning switch enabled.
+// _PROMOTE_: Promote warning to error.
+// _IGNORE_: Drop backend warning.
+//
+// RUN: not %clang_cc1 %s -mllvm -warn-stack-size=0 -S -o - -triple=i386-apple-darwin 2> %t.err
+// RUN: FileCheck < %t.err %s --check-prefix=REGULAR --check-prefix=ASM
+// RUN: not %clang_cc1 %s -mllvm -warn-stack-size=0 -S -o - -triple=i386-apple-darwin -Werror=frame-larger-than 2> %t.err
+// RUN: FileCheck < %t.err %s --check-prefix=PROMOTE --check-prefix=ASM
+// RUN: not %clang_cc1 %s -mllvm -warn-stack-size=0 -S -o - -triple=i386-apple-darwin -Wno-frame-larger-than 2> %t.err
+// RUN: FileCheck < %t.err %s --check-prefix=IGNORE --check-prefix=ASM
+//
+// Currently the stack size reporting cannot be checked with -verify because
+//  no source location is attached to the diagnostic. Therefore do not emit
+// them for the -verify test for now.
+// RUN: %clang_cc1 %s -S -o - -triple=i386-apple-darwin -verify
+
+extern void doIt(char *);
+
+// REGULAR: warning: stack size exceeded ({{[0-9]+}}) in stackSizeWarning
+// PROMOTE: error: stack size exceeded ({{[0-9]+}}) in stackSizeWarning
+// IGNORE-NOT: stack size exceeded ({{[0-9]+}}) in stackSizeWarning
+void stackSizeWarning() {
+  char buffer[80];
+  doIt(buffer);
+}
+
+// ASM: inline assembly requires more registers than available
+void inlineAsmError(int x0, int x1, int x2, int x3, int x4,
+                    int x5, int x6, int x7, int x8, int x9) {
+  __asm__("hello world": : "r" (x0),"r" (x1),"r" (x2),"r" (x3), // expected-error + {{inline assembly requires more registers than available}}
+          "r" (x4),"r" (x5),"r" (x6),"r" (x7),"r" (x8),"r" (x9));
+}