File: ssa-pre-2.c

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gcc-arm-none-eabi 15%3A7-2018-q2-5
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/* { dg-do compile } */ 
/* { dg-options "-O2 -fno-code-hoisting -fdump-tree-pre-stats" } */
int motion_test1(int data, int data_0, int data_3, int v)
{
	int i;
	int t, u;

	if (data)
		i = data_0 + data_3;
	else {
		v = 2;
		i = 5;
	}
	t = data_0 + data_3;
	u = i;
	return v * t * u;
}
/* We should eliminate one computation of data_0 + data_3 along the 
   main path.  We cannot re-associate v * t * u due to undefined
   signed overflow so we do not eliminate one computation of v * i along
   the main path. */
/* { dg-final { scan-tree-dump-times "Eliminated: 2" 1 "pre" { xfail *-*-* } } } */
/* { dg-final { scan-tree-dump-times "Eliminated: 1" 1 "pre" } } */