1 files changed, 95 insertions, 0 deletions
diff --git a/gcc/testsuite/g++.dg/warn/Wsign-conversion.C b/gcc/testsuite/g++.dg/warn/Wsign-conversion.C
new file mode 100644
index 000000000..83fe2ed66
--- /dev/null
+++ b/gcc/testsuite/g++.dg/warn/Wsign-conversion.C
@@ -0,0 +1,95 @@
+/* Test for diagnostics for implicit conversions between signed and
+   unsigned integer types.
+   C++ equivalent of gcc/testsuite/gcc.dg/Wsign-conversion.c  */
+
+// { dg-do compile } 
+// { dg-options "-fsigned-char -Wsign-conversion" } 
+#include <limits.h>
+
+void fsc (signed char sc);
+void fuc (unsigned char uc);
+unsigned fui (unsigned int  ui);
+void fsi (signed int ui);
+
+void h (int x)
+{
+  unsigned int ui = 3;
+  int   si = 3;
+  unsigned char uc = 3;
+  signed char   sc = 3;
+
+  uc = ui; 
+  uc = si; 
+  sc = ui; 
+  sc = si; 
+  fuc (ui);
+  fuc (si);
+  fsc (ui);
+  fsc (si);
+
+  fsi (si);
+  fui (ui);
+  fsi (uc);
+  si = uc;
+  fui (uc);
+  ui = uc;
+  fui ('A');
+  ui = 'A';
+  fsi ('A');
+  si = 'A';
+  fuc ('A');
+  uc = 'A';
+
+  uc = x ? 1U : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  uc = x ? SCHAR_MIN : 1U;  /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  uc = x ? 1 : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  uc = x ? SCHAR_MIN : 1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = x ? 1U : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = x ? INT_MIN : 1U; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = ui ? SCHAR_MIN : 1U; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = 1U * -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = ui + INT_MIN; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = x ? 1 : -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = ui ? SCHAR_MIN : 1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+
+  fuc (-1); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  uc = -1;  /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  fui (-1); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = -1; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  fuc ('\xa0'); /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  uc = '\xa0'; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  fui ('\xa0');/* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  ui = '\xa0'; /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+  fsi (0x80000000); /* { dg-warning "conversion" } */
+  si = 0x80000000;  /* { dg-warning "conversion" } */
+
+
+  fsi (UINT_MAX - 1);  /* { dg-warning "conversion" } */
+  si = UINT_MAX - 1;   /* { dg-warning "conversion" } */
+  fsi (UINT_MAX - 1U); /* { dg-warning "conversion" } */
+  si = UINT_MAX - 1U;  /* { dg-warning "conversion" } */
+  fsi (UINT_MAX/3U);
+  si = UINT_MAX/3U;
+  fsi (UINT_MAX/3);
+  si = UINT_MAX/3;
+  fui (UINT_MAX - 1);
+  ui = UINT_MAX - 1;
+
+  uc = (unsigned char) -1;
+  ui = -1 * (1 * -1);
+  ui = (unsigned) -1;
+
+  fsc (uc); /* { dg-warning "conversion" } */
+  sc = uc;  /* { dg-warning "conversion" } */
+  fuc (sc); /* { dg-warning "conversion" } */
+  uc = sc;  /* { dg-warning "conversion" } */
+  fsi (ui); /* { dg-warning "conversion" } */
+  si = ui;  /* { dg-warning "conversion" } */
+  fui (si); /* { dg-warning "conversion" } */ 
+  ui = si;  /* { dg-warning "conversion" } */ 
+  fui (sc); /* { dg-warning "conversion" } */
+  ui = sc;  /* { dg-warning "conversion" } */
+}
+
+unsigned fui (unsigned a) { return a + -1; } /* { dg-warning "negative integer implicitly converted to unsigned type" } */
+