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/20041122-1.c | 38 ++++++++++++++++++++++++++++++ 1 file changed, 38 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c (limited to 'gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c') diff --git a/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c b/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c new file mode 100644 index 000000000..600794954 --- /dev/null +++ b/gcc/testsuite/gcc.dg/tree-ssa/20041122-1.c @@ -0,0 +1,38 @@ +/* { dg-do compile } */ +/* { dg-options "-O1 -fstrict-aliasing -fdump-tree-fre" } */ + +__extension__ typedef __SIZE_TYPE__ size_t; +extern void *xmalloc (size_t) __attribute__ ((__malloc__)); +struct edge_def +{ + struct basic_block_def *dest; + int flags; +}; +typedef struct edge_def *edge; +struct basic_block_def +{ + int flags; +}; +typedef struct basic_block_def *basic_block; +extern int n_basic_blocks; +extern edge frob (); +basic_block * +find_unreachable_blocks (void) +{ + basic_block *tos, *worklist; + tos = worklist = xmalloc (sizeof (basic_block) * n_basic_blocks); + edge e = frob(); + if (!(e->dest->flags & 4)) + { + e->dest->flags |= 4; + *tos++ = e->dest; + } + return worklist; +} + +/* If the aliasing code does its job properly, then we should be + able to determine that modifying e->dest->flags does not + modify e or e->dest if we can assert strict-aliasing rules. + The net result is that we only need one load of e->dest. */ +/* { dg-final { scan-tree-dump-times "->dest" 1 "fre" } } */ +/* { dg-final { cleanup-tree-dump "fre" } } */ -- cgit v1.2.3