diff options
Diffstat (limited to 'gcc/cfglayout.c')
| -rw-r--r-- | gcc/cfglayout.c | 34 |
1 files changed, 30 insertions, 4 deletions
diff --git a/gcc/cfglayout.c b/gcc/cfglayout.c index 83bc6b7..bd58972 100644 --- a/gcc/cfglayout.c +++ b/gcc/cfglayout.c @@ -241,6 +241,10 @@ scope_to_insns_initialize () } } } + + /* Tag the blocks with a depth number so that change_scope can find + the common parent easily. */ + set_block_levels (DECL_INITIAL (cfun->decl), 0); } /* For each lexical block, set BLOCK_NUMBER to the depth at which it is @@ -259,6 +263,20 @@ set_block_levels (block, level) } } +/* Return sope resulting from combination of S1 and S2. */ +tree +choose_inner_scope (s1, s2) + tree s1, s2; +{ + if (!s1) + return s2; + if (!s2) + return s1; + if (BLOCK_NUMBER (s1) > BLOCK_NUMBER (s2)) + return s1; + return s2; +} + /* Emit lexical block notes needed to change scope from S1 to S2. */ static void @@ -315,10 +333,6 @@ scope_to_insns_finalize () tree cur_block = DECL_INITIAL (cfun->decl); rtx insn, note; - /* Tag the blocks with a depth number so that change_scope can find - the common parent easily. */ - set_block_levels (cur_block, 0); - insn = get_insns (); if (!active_insn_p (insn)) insn = next_active_insn (insn); @@ -327,6 +341,18 @@ scope_to_insns_finalize () tree this_block; this_block = INSN_SCOPE (insn); + /* For sequences compute scope resulting from merging all scopes + of instructions nested inside. */ + if (GET_CODE (PATTERN (insn)) == SEQUENCE) + { + int i; + rtx body = PATTERN (insn); + + this_block = NULL; + for (i = 0; i < XVECLEN (body, 0); i++) + this_block = choose_inner_scope (this_block, + INSN_SCOPE (XVECEXP (body, 0, i))); + } if (! this_block) continue; |