Teach Type::is[un]SignedIntegerType about enum decls. This allows the code generator

to emit signed comparisons when needed for enum decl references.  This implements
test/CodeGen/enum.c.  I think enums should be good now.

llvm-svn: 41572

1 files changed, 18 insertions, 0 deletions

diff --git a/clang/test/CodeGen/enum.c b/clang/test/CodeGen/enum.c
new file mode 100644
index 00000000000..f671dfca0c9
--- /dev/null
+++ b/clang/test/CodeGen/enum.c
@@ -0,0 +1,18 @@
+// RUN: clang %s -emit-llvm | llvm-as | opt -std-compile-opts | llvm-dis | grep 'ret i32 6'
+
+static enum { foo, bar = 1U } z;
+
+int main (void)
+{
+  int r = 0;
+
+  if (bar - 2 < 0)
+    r += 4;
+  if (foo - 1 < 0)
+    r += 2;
+  if (z - 1 < 0)
+    r++;
+
+  return r;
+}
+