From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- gcc/testsuite/gcc.dg/tree-ssa/loop-8.c | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/loop-8.c (limited to 'gcc/testsuite/gcc.dg/tree-ssa/loop-8.c') diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-8.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-8.c new file mode 100644 index 000000000..de439c719 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-8.c @@ -0,0 +1,25 @@ +/* A test for strength reduction of ivs with nonconstant step. */ + +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-optimized" } */ + +int bar (void); + +int a[100]; + +void xxx (void) +{ + int iter, step = bar (); + + for (iter = 0; iter < 10; iter++) + a[iter * step] = bar (); +} + +/* The array access should be strength reduced. But to determine the value of + the step, we need to calculate step * sizeof (int), thus we need to be + a bit careful about which multiplications we disallow. */ + +/* { dg-final { scan-tree-dump-times "step \\* \[^0-9\]" 0 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "\[^0-9\] \\* step" 0 "optimized" } } */ + +/* { dg-final { cleanup-tree-dump "optimized" } } */ -- cgit v1.2.3