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-4.c | 46 ++++++++++++++++++++++++++++++++++ 1 file changed, 46 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/loop-4.c (limited to 'gcc/testsuite/gcc.dg/tree-ssa/loop-4.c') diff --git a/gcc/testsuite/gcc.dg/tree-ssa/loop-4.c b/gcc/testsuite/gcc.dg/tree-ssa/loop-4.c new file mode 100644 index 000000000..a6c8c8fd3 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/loop-4.c @@ -0,0 +1,46 @@ +/* A test for strength reduction and induction variable elimination. */ + +/* { dg-do compile } */ +/* { dg-options "-O1 -fdump-tree-optimized" } */ +/* { dg-require-effective-target size32plus } */ + +/* Size of this structure should be sufficiently weird so that no memory + addressing mode applies. */ + +struct bla +{ + char x[187]; + int y; + char z[253]; +} arr_base[100]; + +int foo(void); + +void xxx(void) +{ + int iter; + + for (iter = 0; iter < 100; iter++) + arr_base[iter].y = foo (); +} + +/* Access to arr_base[iter].y should be strength reduced. Depending on + whether we have an addressing mode of type [base + offset], one of the + following forms might get chosen: + + -- induction variable with base &arr_base[0].y, the memory access of + form *iv = ... + -- induction variable with base 0, the memory access of form + *(iv + &arr_base[0].y) = ... + + In any case, we should not have any multiplication. */ + +/* { dg-final { scan-tree-dump-times " \\* \[^\\n\\r\]*=" 0 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "\[^\\n\\r\]*= \\* " 0 "optimized" } } */ +/* { dg-final { scan-tree-dump-times "MEM" 1 "optimized" } } */ + +/* And the original induction variable should be eliminated. */ + +/* { dg-final { scan-tree-dump-times "iter" 0 "optimized" } } */ + +/* { dg-final { cleanup-tree-dump "optimized" } } */ -- cgit v1.2.3