* gcc.dg/compare2.c: New test.

git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@33016 138bc75d-0d04-0410-961f-82ee72b054a4

1 files changed, 58 insertions, 0 deletions

diff --git a/gcc/testsuite/gcc.dg/compare2.c b/gcc/testsuite/gcc.dg/compare2.c
new file mode 100644
index 00000000000..0625eb9c3f6
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/compare2.c
@@ -0,0 +1,58 @@
+/* Test for a bogus warning on comparison between signed and unsigned.
+   This was inspired by code in gcc. */
+
+/* { dg-do compile } */
+/* { dg-options "-Wsign-compare" } */
+
+int tf = 1;
+
+void f(int x, unsigned int y)
+{
+  /* ?: branches are constants.  */
+  x > (tf?64:128); /* { dg-bogus "signed and unsigned" "case 1" } */
+  y > (tf?64:128); /* { dg-bogus "signed and unsigned" "case 2" } */
+
+  /* ?: branches are (recursively) constants.  */
+  x > (tf?64:(tf?128:256)); /* { dg-bogus "signed and unsigned" "case 3" } */
+  y > (tf?64:(tf?128:256)); /* { dg-bogus "signed and unsigned" "case 4" } */
+
+  /* ?: branches are signed constants.  */
+  x > (tf?64:-1); /* { dg-bogus "signed and unsigned" "case 5" } */
+  y > (tf?64:-1); /* { dg-warning "signed and unsigned" "case 6" } */
+
+  /* ?: branches are (recursively) signed constants.  */
+  x > (tf?64:(tf?128:-1)); /* { dg-bogus "signed and unsigned" "case 7" } */
+  y > (tf?64:(tf?128:-1)); /* { dg-warning "signed and unsigned" "case 8" } */
+
+  /* Statement expression.  */
+  x > ({tf; 64;}); /* { dg-bogus "signed and unsigned" "case 9" } */
+  y > ({tf; 64;}); /* { dg-bogus "signed and unsigned" "case 10" } */
+
+  /* Statement expression with recursive ?: .  */
+  x > ({tf; tf?64:(tf?128:256);}); /* { dg-bogus "signed and unsigned" "case 11" } */
+  y > ({tf; tf?64:(tf?128:256);}); /* { dg-bogus "signed and unsigned" "case 12" } */
+
+  /* Statement expression with signed ?:.  */
+  x > ({tf; tf?64:-1;}); /* { dg-bogus "signed and unsigned" "case 13" } */
+  y > ({tf; tf?64:-1;}); /* { dg-warning "signed and unsigned" "case 14" } */
+
+  /* Statement expression with recursive signed ?:.  */
+  x > ({tf; tf?64:(tf?128:-1);}); /* { dg-bogus "signed and unsigned" "case 15" } */
+  y > ({tf; tf?64:(tf?128:-1);}); /* { dg-warning "signed and unsigned" "case 16" } */
+
+  /* ?: branches are constants.  */
+  tf ? x : (tf?64:32); /* { dg-bogus "conditional expression" "case 17" } */
+  tf ? y : (tf?64:32); /* { dg-bogus "conditional expression" "case 18" } */
+
+  /* ?: branches are signed constants.  */
+  tf ? x : (tf?64:-1); /* { dg-bogus "conditional expression" "case 19" } */
+  tf ? y : (tf?64:-1); /* { dg-warning "conditional expression" "case 20" } */
+
+  /* ?: branches are (recursively) constants.  */
+  tf ? x : (tf?64:(tf?128:256)); /* { dg-bogus "conditional expression" "case 21" } */
+  tf ? y : (tf?64:(tf?128:256)); /* { dg-bogus "conditional expression" "case 22" } */
+
+  /* ?: branches are (recursively) signed constants.  */
+  tf ? x : (tf?64:(tf?128:-1)); /* { dg-bogus "conditional expression" "case 23" } */
+  tf ? y : (tf?64:(tf?128:-1)); /* { dg-warning "conditional expression" "case 24" } */
+}