| author | "Yann E. MORIN" <yann.morin.1998@anciens.enib.fr> |
| Sat Feb 24 11:00:05 2007 +0000 (2007-02-24) | |
| changeset 1 | eeea35fbf182 |
| permissions | -rw-r--r-- |
| yann@1 | 1 |
--- /dev/null Sat Dec 14 13:56:51 2002 |
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+++ gcc-3.3.1/gcc/testsuite/gcc.dg/pr11864-1.c Sun Sep 14 14:32:24 2003 |
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@@ -0,0 +1,42 @@ |
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+/* PR optimization/11864 |
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+ * Reporter: Kazumoto Kojima <kkojima@gcc.gnu.org> |
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+ * Summary: [3.3/3.4 regression] miscompiles zero extension and test |
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+ * Description: |
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+ * gcc-3.3/3.4 -O2 for sh target may miscompile the combination of zero extension |
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+ * and test if it's zero. |
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+ * |
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+ * Testcase tweaked by dank@kegel.com. Not marked as xfail because it's a regression. |
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+ */ |
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+/* { dg-do run } */
|
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+/* { dg-options "-O2" } */
|
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+ |
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+extern void abort(void); |
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+ |
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+int val = 0xff00; |
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+ |
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+int f(void) |
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+{
|
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+ return val; |
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+} |
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+ |
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+unsigned char a[1]; |
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+ |
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+void foo(void) |
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+{
|
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+ a[0] = f() & 255; |
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+ |
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+ if (!a[0]) |
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+ a[0] = f() & 255; |
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+ |
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+ if (!a[0]) |
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+ a[0] = 1 + (f() & 127); |
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+} |
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+ |
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+int main(int argc, char **argv) |
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+{
|
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+ foo(); |
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+ if (!a[0]) |
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+ abort(); |
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+ |
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+ return 0; |
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+} |