diff options
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/tree-ssa-loop-manip.c | 24 |
2 files changed, 18 insertions, 12 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 16b61b2..a0123b1 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2015-08-31 Tom de Vries <tom@codesourcery.com> + + * tree-ssa-loop-manip.c (find_uses_to_rename_use) + (find_uses_to_rename_stmt, find_uses_to_rename_bb, find_uses_to_rename): + Improve function header comments. + 2015-08-30 Michael Collison <michael.collison@linaro.org> PR other/67320 diff --git a/gcc/tree-ssa-loop-manip.c b/gcc/tree-ssa-loop-manip.c index cb762df..5c13d4b 100644 --- a/gcc/tree-ssa-loop-manip.c +++ b/gcc/tree-ssa-loop-manip.c @@ -366,7 +366,9 @@ get_loops_exits (bitmap *loop_exits) /* For USE in BB, if it is used outside of the loop it is defined in, mark it for rewrite. Record basic block BB where it is used - to USE_BLOCKS. Record the ssa name index to NEED_PHIS bitmap. */ + to USE_BLOCKS. Record the ssa name index to NEED_PHIS bitmap. + Note that for USEs in phis, BB should be the src of the edge corresponding to + the use, rather than the bb containing the phi. */ static void find_uses_to_rename_use (basic_block bb, tree use, bitmap *use_blocks, @@ -402,9 +404,8 @@ find_uses_to_rename_use (basic_block bb, tree use, bitmap *use_blocks, } /* For uses in STMT, mark names that are used outside of the loop they are - defined to rewrite. Record the set of blocks in that the ssa - names are defined to USE_BLOCKS and the ssa names themselves to - NEED_PHIS. */ + defined to rewrite. Record the set of blocks in which the ssa names are used + to USE_BLOCKS and the ssa names themselves to NEED_PHIS. */ static void find_uses_to_rename_stmt (gimple stmt, bitmap *use_blocks, bitmap need_phis) @@ -420,10 +421,9 @@ find_uses_to_rename_stmt (gimple stmt, bitmap *use_blocks, bitmap need_phis) find_uses_to_rename_use (bb, var, use_blocks, need_phis); } -/* Marks names that are used in BB and outside of the loop they are - defined in for rewrite. Records the set of blocks in that the ssa - names are defined to USE_BLOCKS. Record the SSA names that will - need exit PHIs in NEED_PHIS. */ +/* Marks names that are used in BB and outside of the loop they are defined in + for rewrite. Records the set of blocks in which the ssa names are used to + USE_BLOCKS. Record the SSA names that will need exit PHIs in NEED_PHIS. */ static void find_uses_to_rename_bb (basic_block bb, bitmap *use_blocks, bitmap need_phis) @@ -446,10 +446,10 @@ find_uses_to_rename_bb (basic_block bb, bitmap *use_blocks, bitmap need_phis) find_uses_to_rename_stmt (gsi_stmt (bsi), use_blocks, need_phis); } -/* Marks names that are used outside of the loop they are defined in - for rewrite. Records the set of blocks in that the ssa - names are defined to USE_BLOCKS. If CHANGED_BBS is not NULL, - scan only blocks in this set. */ +/* Marks names that are used outside of the loop they are defined in for + rewrite. Records the set of blocks in which the ssa names are used to + USE_BLOCKS. Record the SSA names that will need exit PHIs in NEED_PHIS. If + CHANGED_BBS is not NULL, scan only blocks in this set. */ static void find_uses_to_rename (bitmap changed_bbs, bitmap *use_blocks, bitmap need_phis) |