43 lines
697 B
C
43 lines
697 B
C
/* 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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