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| author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
|---|---|---|
| committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
| commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
| tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_4.c | |
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Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_4.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_4.c | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_4.c b/gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_4.c new file mode 100644 index 000000000..d2aa78d61 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/ivopt_mult_4.c @@ -0,0 +1,25 @@ + +/* { dg-do compile { target {{ i?86-*-* x86_64-*-* } && lp64 } } } */ +/* { dg-options "-O2 -m64 -fdump-tree-ivopts-details" } */ + +/* iv i's step 16 so its period is smaller than the max iterations + * i.e. replacing if (p2 > p_limit2) with testing of i may result in + * overflow. */ +long foo(long* p, long* p2, int N1, int N2) +{ + unsigned long i = 0; + long* p_limit2 = p2 + N2; + long s = 0; + while (i < N1) + { + p2++; + i += 16; + if (p2 > p_limit2) + break; + s += p[i]; + } + return s; +} + +/* { dg-final { scan-tree-dump-times "Replacing" 0 "ivopts"} } */ +/* { dg-final { cleanup-tree-dump "ivopts" } } */ |