aboutsummaryrefslogtreecommitdiff
path: root/gcc/tree.h
diff options
context:
space:
mode:
authorKazu Hirata <kazu@cs.umass.edu>2005-04-27 01:43:11 +0000
committerKazu Hirata <kazu@gcc.gnu.org>2005-04-27 01:43:11 +0000
commit5dbc71f87890e49c10594e4b38309ffc0ca508d9 (patch)
treee3bbb29275f5efd22764db9fc6849815da351e70 /gcc/tree.h
parenteb3490b96c149c8a5559b3f3947257c4ce0df650 (diff)
downloadgcc-5dbc71f87890e49c10594e4b38309ffc0ca508d9.zip
gcc-5dbc71f87890e49c10594e4b38309ffc0ca508d9.tar.gz
gcc-5dbc71f87890e49c10594e4b38309ffc0ca508d9.tar.bz2
* tree.h (phi_arg_d): Expand a comment in phi_arg_d.
From-SVN: r98813
Diffstat (limited to 'gcc/tree.h')
-rw-r--r--gcc/tree.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/gcc/tree.h b/gcc/tree.h
index 40c3119..eb4e452 100644
--- a/gcc/tree.h
+++ b/gcc/tree.h
@@ -1424,7 +1424,9 @@ struct edge_def;
struct phi_arg_d GTY(())
{
- struct ssa_imm_use_d imm_use; /* imm_use MUST be first element in struct. */
+ /* imm_use MUST be the first element in struct because we do some
+ pointer arithmetic with it. See phi_arg_index_from_use. */
+ struct ssa_imm_use_d imm_use;
tree def;
bool nonzero;
};