Fix tree-ssa/pr31261.c testcase after r16-400 [PR120168]

AFter r16-400-g5e363ffefaceb9, on targets where char is unsigned by
default, tree-ssa/pr31261.c testcase started to fail:
FAIL: gcc.dg/tree-ssa/pr31261.c scan-tree-dump-times original "return \\\\(char\\\\) -\\\\(unsigned char\\\\) c & 31;" 1

This is because the casts are no longer needed as both char and
unsigned char are the same signedness.
I was deciding between add -fsigned-char or changing the testcase
to use explicitly `signed char`. I went with using an explicit
`signed char` as that would be case normally.

	PR testsuite/120168

gcc/testsuite/ChangeLog:

	* gcc.dg/tree-ssa/pr31261.c: Use `signed char` instead
	of plain char.

Signed-off-by: Andrew Pinski <quic_apinski@quicinc.com>

diff --git a/gcc/testsuite/gcc.dg/tree-ssa/pr31261.c b/gcc/testsuite/gcc.dg/tree-ssa/pr31261.c
index 127300fdd24f155995b2de3e87da82d86f57f2f7..dafb4c46c9cffb34fca7649690585b14e185ec9d 100644 (file)
--- a/gcc/testsuite/gcc.dg/tree-ssa/pr31261.c
+++ b/gcc/testsuite/gcc.dg/tree-ssa/pr31261.c
@@ -14,8 +14,8 @@ f2 (long int b)
   return (16 + (b & 7)) & 15;
 }
 
-char
-f3 (char c)
+signed char
+f3 (signed char c)
 {
   return -(c & 63) & 31;
 }
@@ -34,7 +34,7 @@ f5 (int e)
 
 /* { dg-final { scan-tree-dump-times "return -a \& 7;" 1 "original" } } */
 /* { dg-final { scan-tree-dump-times "return b \& 7;" 1 "original" } } */
-/* { dg-final { scan-tree-dump-times "return \\(char\\) -\\(unsigned char\\) c \& 31;" 1 "original" } } */
+/* { dg-final { scan-tree-dump-times "return \\(signed char\\) -\\(unsigned char\\) c \& 31;" 1 "original" } } */
 /* { dg-final { scan-tree-dump-times "return \\(int\\) \\(12 - \\(unsigned int\\) d\\) \& 7;" 1 "original" { target { ! int16 } } } } */
 /* { dg-final { scan-tree-dump-times "return \\(int\\) \\(12 - \\(unsigned short\\) d\\) \& 7;" 1 "original" { target { int16 } } } } */
 /* { dg-final { scan-tree-dump-times "return 12 - \\(e \& 7\\) \& 15;" 1 "original" } } */