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Diffstat (limited to 'gcc/testsuite/gcc.dg/tree-ssa/loop-19.c')
| -rw-r--r-- | gcc/testsuite/gcc.dg/tree-ssa/loop-19.c | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-19.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-19.c new file mode 100644 index 000000000..80f2e601e --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-19.c @@ -0,0 +1,28 @@ +/* This tests strength reduction and choice of induction variables. The targets + for this testcase are quite limited, as with different set of available + addressing modes, the results may be quite different. + + The testcase comes from PR 29256 (and originally, the stream benchmark). */ + +/* { dg-do compile { target { i?86-*-* || { x86_64-*-* || powerpc_hard_double } } } } */ +/* { dg-require-effective-target nonpic } */ +/* { dg-options "-O3 -fno-prefetch-loop-arrays -fdump-tree-optimized" } */ + +# define N 2000000 +double a[N],c[N]; +void tuned_STREAM_Copy() +{ + int j; + for (j=0; j<N; j++) + c[j] = a[j]; +} + +/* Check that the memory references are based on &a and &c, with appropriate + offsets. Ideally, we would want each of them to appear once in the output. + However, due to a bug in jump threading, we end up peeling one iteration from + the loop, which creates an additional occurence. */ + +/* { dg-final { scan-tree-dump-times "MEM.(base: &|symbol: )a," 2 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "MEM.(base: &|symbol: )c," 2 "optimized" } } */ + +/* { dg-final { cleanup-tree-dump "optimized" } } */ |