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| author | Alexandre Oliva <aoliva@redhat.com> | 2012-06-13 20:41:41 +0000 |
|---|---|---|
| committer | Alexandre Oliva <aoliva@gcc.gnu.org> | 2012-06-13 20:41:41 +0000 |
| commit | 21d01365ab8d0e16c681352cc0cc0e7ab726dc03 (patch) | |
| tree | 126009dcd8222ffd4b61e63e72cc8fdf8cef55da /gcc/tree-ssa-copyrename.c | |
| parent | b78fd1642a52a841780204061dbf23827cbca334 (diff) | |
| download | gcc-21d01365ab8d0e16c681352cc0cc0e7ab726dc03.zip gcc-21d01365ab8d0e16c681352cc0cc0e7ab726dc03.tar.gz gcc-21d01365ab8d0e16c681352cc0cc0e7ab726dc03.tar.bz2 | |
common.opt (ftree-coalesce-inlined-vars): New.
gcc/ChangeLog:
* common.opt (ftree-coalesce-inlined-vars): New.
(ftree-coalesce-vars): New.
* doc/invoke.texi: Document them.
* tree-ssa-copyrename.c (copy_rename_partition_coalesce):
Implement them.
gcc/testsuite/ChangeLog:
* g++.dg/tree-ssa/ivopts-2.C: Adjust for coalescing.
* gcc.dg/tree-ssa/forwprop-11.c: Likewise.
* gcc.dg/tree-ssa/ssa-fre-1.c: Likewise.
From-SVN: r188526
Diffstat (limited to 'gcc/tree-ssa-copyrename.c')
| -rw-r--r-- | gcc/tree-ssa-copyrename.c | 13 |
1 files changed, 7 insertions, 6 deletions
diff --git a/gcc/tree-ssa-copyrename.c b/gcc/tree-ssa-copyrename.c index 3e01b6e..6ee8380 100644 --- a/gcc/tree-ssa-copyrename.c +++ b/gcc/tree-ssa-copyrename.c @@ -194,20 +194,21 @@ copy_rename_partition_coalesce (var_map map, tree var1, tree var2, FILE *debug) ign1 = TREE_CODE (root1) == VAR_DECL && DECL_IGNORED_P (root1); ign2 = TREE_CODE (root2) == VAR_DECL && DECL_IGNORED_P (root2); - /* Never attempt to coalesce 2 user variables unless one is an inline - variable. */ + /* Refrain from coalescing user variables, if requested. */ if (!ign1 && !ign2) { - if (DECL_FROM_INLINE (root2)) - ign2 = true; - else if (DECL_FROM_INLINE (root1)) + if (flag_ssa_coalesce_vars && DECL_FROM_INLINE (root2)) + ign2 = true; + else if (flag_ssa_coalesce_vars && DECL_FROM_INLINE (root1)) ign1 = true; - else + else if (flag_ssa_coalesce_vars != 2) { if (debug) fprintf (debug, " : 2 different USER vars. No coalesce.\n"); return false; } + else + ign2 = true; } /* If both values have default defs, we can't coalesce. If only one has a |