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[/] [scarts/] [trunk/] [toolchain/] [scarts-gcc/] [gcc-4.1.1/] [gcc/] [testsuite/] [gcc.dg/] [pr11864-1.c] - Blame information for rev 12

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1 12 jlechner
/* 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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extern void abort(void);
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int val = 0xff00;
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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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unsigned char a[1];
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void foo(void)
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{
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        a[0] = f() & 255;
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        if (!a[0])
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                a[0] = f() & 255;
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        if (!a[0])
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                a[0] = 1 + (f() & 127);
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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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        return 0;
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}

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