73 lines
1.7 KiB
Diff
73 lines
1.7 KiB
Diff
|
2014-07-02 Jakub Jelinek <jakub@redhat.com>
|
||
|
|
|
||
|
|
PR rtl-optimization/61673
|
||
|
|
* combine.c (simplify_comparison): Test just mode's sign bit
|
||
|
|
in tmode rather than the sign bit and any bits above it.
|
||
|
|
|
||
|
|
* gcc.c-torture/execute/pr61673.c: New test.
|
||
|
|
|
||
|
|
--- gcc/combine.c.jj 2014-03-28 20:49:52.892077022 +0100
|
||
|
|
+++ gcc/combine.c 2014-07-02 16:56:02.260456040 +0200
|
||
|
|
@@ -11987,7 +11987,7 @@ simplify_comparison (enum rtx_code code,
|
||
|
|
= (unsigned HOST_WIDE_INT) 1 << (GET_MODE_BITSIZE (mode) - 1);
|
||
|
|
op0 = simplify_gen_binary (AND, tmode,
|
||
|
|
gen_lowpart (tmode, op0),
|
||
|
|
- gen_int_mode (sign, mode));
|
||
|
|
+ gen_int_mode (sign, tmode));
|
||
|
|
code = (code == LT) ? NE : EQ;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
--- gcc/testsuite/gcc.c-torture/execute/pr61673.c.jj 2014-07-02 17:17:01.398908630 +0200
|
||
|
|
+++ gcc/testsuite/gcc.c-torture/execute/pr61673.c 2014-07-02 17:12:36.000000000 +0200
|
||
|
|
@@ -0,0 +1,50 @@
|
||
|
|
+/* PR rtl-optimization/61673 */
|
||
|
|
+
|
||
|
|
+char e;
|
||
|
|
+
|
||
|
|
+__attribute__((noinline, noclone)) void
|
||
|
|
+bar (char x)
|
||
|
|
+{
|
||
|
|
+ if (x != 0x54 && x != (char) 0x87)
|
||
|
|
+ __builtin_abort ();
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+__attribute__((noinline, noclone)) void
|
||
|
|
+foo (const char *x)
|
||
|
|
+{
|
||
|
|
+ char d = x[0];
|
||
|
|
+ int c = d;
|
||
|
|
+ if ((c >= 0 && c <= 0x7f) == 0)
|
||
|
|
+ e = d;
|
||
|
|
+ bar (d);
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+__attribute__((noinline, noclone)) void
|
||
|
|
+baz (const char *x)
|
||
|
|
+{
|
||
|
|
+ char d = x[0];
|
||
|
|
+ int c = d;
|
||
|
|
+ if ((c >= 0 && c <= 0x7f) == 0)
|
||
|
|
+ e = d;
|
||
|
|
+}
|
||
|
|
+
|
||
|
|
+int
|
||
|
|
+main ()
|
||
|
|
+{
|
||
|
|
+ const char c[] = { 0x54, 0x87 };
|
||
|
|
+ e = 0x21;
|
||
|
|
+ foo (c);
|
||
|
|
+ if (e != 0x21)
|
||
|
|
+ __builtin_abort ();
|
||
|
|
+ foo (c + 1);
|
||
|
|
+ if (e != 0x87)
|
||
|
|
+ __builtin_abort ();
|
||
|
|
+ e = 0x21;
|
||
|
|
+ baz (c);
|
||
|
|
+ if (e != 0x21)
|
||
|
|
+ __builtin_abort ();
|
||
|
|
+ baz (c + 1);
|
||
|
|
+ if (e != 0x87)
|
||
|
|
+ __builtin_abort ();
|
||
|
|
+ return 0;
|
||
|
|
+}
|