diff options
Diffstat (limited to 'contrib/gcc/c-semantics.c')
| -rw-r--r-- | contrib/gcc/c-semantics.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/contrib/gcc/c-semantics.c b/contrib/gcc/c-semantics.c index eaa4452..8559fa1 100644 --- a/contrib/gcc/c-semantics.c +++ b/contrib/gcc/c-semantics.c @@ -36,6 +36,7 @@ Software Foundation, 59 Temple Place - Suite 330, Boston, MA #include "expr.h" #include "output.h" #include "timevar.h" +#include "predict.h" /* If non-NULL, the address of a language-specific function for expanding statements. */ @@ -334,7 +335,7 @@ genrtl_expr_stmt (expr) whether to (1) save the value of the expression, (0) discard it or (-1) use expr_stmts_for_value to tell. The use of -1 is deprecated, and retained only for backward compatibility. - MAYBE_LAST is non-zero if this EXPR_STMT might be the last statement + MAYBE_LAST is nonzero if this EXPR_STMT might be the last statement in expression statement. */ void @@ -446,8 +447,9 @@ genrtl_do_stmt (t) /* Recognize the common special-case of do { ... } while (0) and do not emit the loop widgetry in this case. In particular this avoids cluttering the rtl with dummy loop notes, which can affect - alignment of adjacent labels. */ - if (integer_zerop (cond)) + alignment of adjacent labels. COND can be NULL due to parse + errors. */ + if (!cond || integer_zerop (cond)) { expand_start_null_loop (); expand_stmt (DO_BODY (t)); @@ -486,7 +488,7 @@ genrtl_return_stmt (stmt) { tree expr; - expr = RETURN_EXPR (stmt); + expr = RETURN_STMT_EXPR (stmt); emit_line_note (input_filename, lineno); if (!expr) @@ -673,8 +675,7 @@ genrtl_case_label (case_label) if (cleanup) { static int explained = 0; - warning_with_decl (TREE_PURPOSE (cleanup), - "destructor needed for `%#D'"); + warning ("destructor needed for `%#D'", (TREE_PURPOSE (cleanup))); warning ("where case label appears here"); if (!explained) { @@ -835,6 +836,15 @@ expand_stmt (t) break; case GOTO_STMT: + /* Emit information for branch prediction. */ + if (!GOTO_FAKE_P (t) + && TREE_CODE (GOTO_DESTINATION (t)) == LABEL_DECL + && flag_guess_branch_prob) + { + rtx note = emit_note (NULL, NOTE_INSN_PREDICTION); + + NOTE_PREDICTION (note) = NOTE_PREDICT (PRED_GOTO, NOT_TAKEN); + } genrtl_goto_stmt (GOTO_DESTINATION (t)); break; |
