OpenE2K
/
gcc
2
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

re PR rtl-optimization/11864 (miscompiles zero extention and test) 

PR 11864
	From Kazumoto Kojima / Dan Kegel:
	* gcc.dg/pr11864-1.c: New test.

From-SVN: r75987
This commit is contained in:
J"orn Rennecke 2004-01-16 18:43:04 +00:00 committed by Joern Rennecke
parent 144e414d26
commit 71bbcf4d56
2 changed files with 46 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
gcc/testsuite/ChangeLog
View File

@ -5,6 +5,10 @@
2004-01-16 J"orn Rennecke <joern.rennecke@superh.com>
PR 11864
From Kazumoto Kojima / Dan Kegel:
* gcc.dg/pr11864-1.c: New test.
PR 10392
From Marcus Comstedt / Dan Kegel:
* gcc.dg/pr10392-1.c: New test.

42
gcc/testsuite/gcc.dg/pr11864-1.c Normal file
View File

@ -0,0 +1,42 @@
/* PR optimization/11864
* Reporter: Kazumoto Kojima <kkojima@gcc.gnu.org>
* Summary: [3.3/3.4 regression] miscompiles zero extension and test
* Description:
* gcc-3.3/3.4 -O2 for sh target may miscompile the combination of zero extension
* and test if it's zero.
*
* Testcase tweaked by dank@kegel.com. Not marked as xfail because it's a regression.
*/
/* { dg-do run } */
/* { dg-options "-O2" } */
extern void abort(void);
int val = 0xff00;
int f(void)
{
return val;
}
unsigned char a[1];
void foo(void)
{
a[0] = f() & 255;
if (!a[0])
a[0] = f() & 255;
if (!a[0])
a[0] = 1 + (f() & 127);
}
int main(int argc, char **argv)
{
foo();
if (!a[0])
abort();
return 0;
}