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/torture/pr23821.c | 29 +++++++++++++++++++++++++++++ 1 file changed, 29 insertions(+) create mode 100644 gcc/testsuite/gcc.dg/torture/pr23821.c (limited to 'gcc/testsuite/gcc.dg/torture/pr23821.c') diff --git a/gcc/testsuite/gcc.dg/torture/pr23821.c b/gcc/testsuite/gcc.dg/torture/pr23821.c new file mode 100644 index 000000000..7632d8425 --- /dev/null +++ b/gcc/testsuite/gcc.dg/torture/pr23821.c @@ -0,0 +1,29 @@ +/* { dg-do compile } */ +/* { dg-skip-if "" { *-*-* } { "-O0" } { "" } } */ +/* At -O1 DOM threads a jump in a non-optimal way which leads to + the bogus propagation. */ +/* { dg-skip-if "" { *-*-* } { "-O1" } { "" } } */ +/* { dg-options "-fdump-tree-ivcanon-details" } */ + +int a[199]; + +extern void abort (void); + +int +main () +{ + int i, x; + for (i = 0; i < 199; i++) + { + x = a[i]; + if (x != i) + abort (); + } + return 0; +} + +/* Verify that we do not propagate the equivalence x == i into the + induction variable increment. */ + +/* { dg-final { scan-tree-dump "Added canonical iv" "ivcanon" } } */ +/* { dg-final { cleanup-tree-dump "ivcanon" } } */ -- cgit v1.2.3