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gcc43-better-debuginfo.diff
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File gcc43-better-debuginfo.diff of Package gcc43
Fix bnc #681566. Add goto_block to edges. Make use of it and goto_locus at more places. 2008-10-07 Jakub Jelinek <jakub@redhat.com> PR debug/29609 PR debug/36690 PR debug/37616 * basic-block.h (struct edge_def): Add goto_block field. * cfglayout.c (fixup_reorder_chain): Ensure that there is at least one insn with locus corresponding to edge's goto_locus if !optimize. * profile.c (branch_prob): Copy edge's goto_block. * cfgrtl.c (force_nonfallthru_and_redirect): Use goto_locus for emitted jumps. (cfg_layout_merge_blocks): Emit a nop with edge's goto_locus locator in between the merged basic blocks if !optimize and needed. * cfgexpand.c (expand_gimple_cond): Convert goto_block and goto_locus into RTL locator. For unconditional jump use that locator for the jump insn. (expand_gimple_cond): Convert goto_block and goto_locus into RTL locator for all remaining edges. For unconditional jump use that locator for the jump insn. * cfgcleanup.c (try_forward_edges): Avoid the optimization if there is more than one edge or insn locator along the forwarding edges and !optimize. If there is just one, set e->goto_locus. * tree-cfg.c (make_cond_expr_edges, make_goto_expr_edges): Set also edge's goto_block. (move_block_to_fn): Adjust edge's goto_block. testsuite/ 2008-10-07 Jakub Jelinek <jakub@redhat.com> PR debug/29609 PR debug/36690 PR debug/37616 * gcc.dg/debug/pr29609-1.c: New test. * gcc.dg/debug/pr29609-2.c: New test. * gcc.dg/debug/pr36690-1.c: New test. * gcc.dg/debug/pr36690-2.c: New test. * gcc.dg/debug/pr36690-3.c: New test. * gcc.dg/debug/pr37616.c: New test. * gcc.dg/debug/dwarf2/pr29609-1.c: New test. * gcc.dg/debug/dwarf2/pr29609-2.c: New test. * gcc.dg/debug/dwarf2/pr36690-1.c: New test. * gcc.dg/debug/dwarf2/pr36690-2.c: New test. * gcc.dg/debug/dwarf2/pr36690-3.c: New test. * gcc.dg/debug/dwarf2/pr37616.c: New test. Index: gcc/testsuite/gcc.dg/debug/pr36690-1.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/pr36690-1.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,23 @@ +/* PR debug/36690 */ +/* Verify that break func is hit. + This version of the test just checks that it can be compiled, linked + and executed, further testing is done in corresponding gcc.dg/dwarf2/ + test and hopefully in gdb testsuite. */ +/* { dg-do run } */ +/* { dg-options "-O0 -g -dA" } */ + +int i; + +void +func (void) +{ + while (i == 1) + i = 0; +} + +int +main (void) +{ + func (); + return 0; +} Index: gcc/testsuite/gcc.dg/debug/pr36690-2.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/pr36690-2.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,40 @@ +/* PR debug/36690 */ +/* Verify that breakpoint can be put on goto f1, it is hit and + varz at that spot is defined and contains 5. Nowhere else + in the function should be varz in the scope. + This version of the test just checks that it can be compiled, linked + and executed, further testing is done in corresponding gcc.dg/dwarf2/ + test and hopefully in gdb testsuite. */ +/* { dg-do run } */ +/* { dg-options "-O0 -g -dA" } */ + +int cnt; + +void +bar (int i) +{ + cnt += i; +} + +void +foo (int i) +{ + if (!i) + bar (0); + else + { + static int varz = 5; + goto f1; + } + bar (1); +f1: + bar (2); +} + +int +main (void) +{ + foo (0); + foo (1); + return 0; +} Index: gcc/testsuite/gcc.dg/debug/pr36690-3.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/pr36690-3.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,47 @@ +/* PR debug/36690 */ +/* { dg-do run } */ +/* { dg-options "-O0 -g -dA" } */ + +int cnt; + +void +bar (int i) +{ + cnt += i; +} + +void +foo (int i, int j) +{ + if (j) + { + bar (i + 1); + goto f1; + } + bar (i + 2); + goto f2; +f1: + if (i > 10) + goto f3; +f2: + if (i > 40) + goto f4; + else + goto f5; +f3: + bar (i); +f4: + bar (i); +f5: + bar (i); +} + +int +main (void) +{ + foo (0, 1); + foo (11, 1); + foo (21, 0); + foo (41, 0); + return 0; +} Index: gcc/testsuite/gcc.dg/debug/pr29609-1.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/pr29609-1.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,33 @@ +/* PR debug/29609 */ +/* Verify that breakpoint on the break is hit. + This version of the test just checks that it can be compiled, linked + and executed, further testing is done in corresponding gcc.dg/dwarf2/ + test and hopefully in gdb testsuite. */ +/* { dg-do run } */ +/* { dg-options "-O0 -g -dA" } */ + +extern void abort (void); + +int +foo (void) +{ + int a, i; + + for (i = 1; i <= 10; i++) + { + if (i < 3) + a = 1; + else + break; + a = 5; + } + return a; +} + +int +main (void) +{ + if (foo () != 5) + abort (); + return 0; +} Index: gcc/testsuite/gcc.dg/debug/pr29609-2.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/pr29609-2.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,53 @@ +/* PR debug/29609 */ +/* Verify that breakpoint on both goto failure; stmts is hit. + This version of the test just checks that it can be compiled, linked + and executed, further testing is done in corresponding gcc.dg/dwarf2/ + test and hopefully in gdb testsuite. */ +/* { dg-do run } */ +/* { dg-options "-O0 -g -dA" } */ + +extern void abort (void); +int x; + +int +foo (void) +{ + return 0 ^ x; +} + +int +bar (void) +{ + return 1 ^ x; +} + +int +baz (void) +{ + int c; + + if (!foo ()) + goto failure; + + if (!bar ()) + goto failure; + + return 0; + +failure: + return 1; +} + +int +main (void) +{ + if (baz () != 1) + abort (); + x = 1; + if (baz () != 1) + abort (); + x = 2; + if (baz () != 0) + abort (); + return 0; +} Index: gcc/testsuite/gcc.dg/debug/dwarf2/pr36690-1.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/dwarf2/pr36690-1.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,22 @@ +/* PR debug/36690 */ +/* Verify that break func is hit. */ +/* { dg-do compile } */ +/* { dg-options "-O0 -gdwarf-2 -dA" } */ + +int i; + +void +func (void) +{ + while (i == 1) + i = 0; +} + +int +main (void) +{ + func (); + return 0; +} + +/* { dg-final { scan-assembler "pr36690-1.c:11" } } */ Index: gcc/testsuite/gcc.dg/debug/dwarf2/pr36690-2.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/dwarf2/pr36690-2.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,39 @@ +/* PR debug/36690 */ +/* Verify that breakpoint can be put on goto f1, it is hit and + varz at that spot is defined and contains 5. Nowhere else + in the function should be varz in the scope. */ +/* { dg-do compile } */ +/* { dg-options "-O0 -gdwarf-2 -dA" } */ + +int cnt; + +void +bar (int i) +{ + cnt += i; +} + +void +foo (int i) +{ + if (!i) + bar (0); + else + { + static int varz = 5; + goto f1; + } + bar (1); +f1: + bar (2); +} + +int +main (void) +{ + foo (0); + foo (1); + return 0; +} + +/* { dg-final { scan-assembler "pr36690-2.c:24" } } */ Index: gcc/testsuite/gcc.dg/debug/dwarf2/pr29609-1.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/dwarf2/pr29609-1.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,32 @@ +/* PR debug/29609 */ +/* Verify that breakpoint on the break is hit. */ +/* { dg-do compile } */ +/* { dg-options "-O0 -gdwarf-2 -dA" } */ + +void abort (void); + +int +foo (void) +{ + int a, i; + + for (i = 1; i <= 10; i++) + { + if (i < 3) + a = 1; + else + break; + a = 5; + } + return a; +} + +int +main (void) +{ + if (foo () != 5) + abort (); + return 0; +} + +/* { dg-final { scan-assembler "pr29609-1.c:18" } } */ Index: gcc/testsuite/gcc.dg/debug/dwarf2/pr36690-3.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/dwarf2/pr36690-3.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,53 @@ +/* PR debug/36690 */ +/* { dg-do compile } */ +/* { dg-options "-O0 -gdwarf-2 -dA" } */ + +int cnt; + +void +bar (int i) +{ + cnt += i; +} + +void +foo (int i, int j) +{ + if (j) + { + bar (i + 1); + goto f1; + } + bar (i + 2); + goto f2; +f1: + if (i > 10) + goto f3; +f2: + if (i > 40) + goto f4; + else + goto f5; +f3: + bar (i); +f4: + bar (i); +f5: + bar (i); +} + +int +main (void) +{ + foo (0, 1); + foo (11, 1); + foo (21, 0); + foo (41, 0); + return 0; +} + +/* { dg-final { scan-assembler "pr36690-3.c:19" } } */ +/* { dg-final { scan-assembler "pr36690-3.c:22" } } */ +/* { dg-final { scan-assembler "pr36690-3.c:25" } } */ +/* { dg-final { scan-assembler "pr36690-3.c:28" } } */ +/* { dg-final { scan-assembler "pr36690-3.c:30" } } */ Index: gcc/testsuite/gcc.dg/debug/dwarf2/pr29609-2.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/dwarf2/pr29609-2.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,53 @@ +/* PR debug/29609 */ +/* Verify that breakpoint on both goto failure; stmts is hit. */ +/* { dg-do compile } */ +/* { dg-options "-O0 -gdwarf-2 -dA" } */ + +extern void abort (void); +int x; + +int +foo (void) +{ + return 0 ^ x; +} + +int +bar (void) +{ + return 1 ^ x; +} + +int +baz (void) +{ + int c; + + if (!foo ()) + goto failure; + + if (!bar ()) + goto failure; + + return 0; + +failure: + return 1; +} + +int +main (void) +{ + if (baz () != 1) + abort (); + x = 1; + if (baz () != 1) + abort (); + x = 2; + if (baz () != 0) + abort (); + return 0; +} + +/* { dg-final { scan-assembler "pr29609-2.c:27" } } */ +/* { dg-final { scan-assembler "pr29609-2.c:30" } } */ Index: gcc/testsuite/gcc.dg/debug/dwarf2/pr37616.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/dwarf2/pr37616.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,41 @@ +/* PR debug/37616 */ +/* Test that one can put breakpoints onto continue, exitlab and break + and actually see program reaching those breakpoints. */ +/* { dg-do compile } */ +/* { dg-options "-O0 -gdwarf-2 -dA" } */ + +extern void abort (void); + +int +foo (int parm) +{ + int varj, varm; + + for (varj = 0; varj < 10; varj++) + { + if (varj == 5) + continue; + if (varj == 7 && !parm) + goto exitlab; + if (varj == 9) + break; + varm = varj; + } + +exitlab: + return varm; +} + +int +main (void) +{ + if (foo (0) != 6) + abort (); + if (foo (1) != 8) + abort (); + return 0; +} + +/* { dg-final { scan-assembler "pr37616.c:17" } } */ +/* { dg-final { scan-assembler "pr37616.c:19" } } */ +/* { dg-final { scan-assembler "pr37616.c:21" } } */ Index: gcc/testsuite/gcc.dg/debug/pr37616.c =================================================================== --- /dev/null 1970-01-01 00:00:00.000000000 +0000 +++ gcc/testsuite/gcc.dg/debug/pr37616.c 2011-09-16 17:35:45.000000000 +0200 @@ -0,0 +1,40 @@ +/* PR debug/37616 */ +/* Test that one can put breakpoints onto continue, exitlab and break + and actually see program reaching those breakpoints. + This version of the test just checks that it can be compiled, linked + and executed, further testing is done in corresponding gcc.dg/dwarf2/ + test and hopefully in gdb testsuite. */ +/* { dg-do run } */ +/* { dg-options "-O0 -g -dA" } */ + +extern void abort (void); + +int +foo (int parm) +{ + int varj, varm; + + for (varj = 0; varj < 10; varj++) + { + if (varj == 5) + continue; + if (varj == 7 && !parm) + goto exitlab; + if (varj == 9) + break; + varm = varj; + } + +exitlab: + return varm; +} + +int +main (void) +{ + if (foo (0) != 6) + abort (); + if (foo (1) != 8) + abort (); + return 0; +} Index: gcc/profile.c =================================================================== --- gcc/profile.c.orig 2008-02-19 10:56:00.000000000 +0100 +++ gcc/profile.c 2011-09-16 17:36:37.000000000 +0200 @@ -824,8 +824,10 @@ branch_prob (void) || (e->goto_locus->line != EXPR_LOCUS (last)->line))) #endif { - basic_block new = split_edge (e); - single_succ_edge (new)->goto_locus = e->goto_locus; + basic_block new_bb = split_edge (e); + edge ne = single_succ_edge (new_bb); + ne->goto_locus = e->goto_locus; + ne->goto_block = e->goto_block; } if ((e->flags & (EDGE_ABNORMAL | EDGE_ABNORMAL_CALL)) && e->dest != EXIT_BLOCK_PTR) Index: gcc/cfgexpand.c =================================================================== --- gcc/cfgexpand.c.orig 2011-09-16 17:19:28.000000000 +0200 +++ gcc/cfgexpand.c 2011-09-16 17:50:11.000000000 +0200 @@ -1336,7 +1336,12 @@ expand_gimple_cond_expr (basic_block bb, add_reg_br_prob_note (last, true_edge->probability); maybe_dump_rtl_for_tree_stmt (stmt, last); if (true_edge->goto_locus) - set_curr_insn_source_location (location_from_locus (true_edge->goto_locus)); + { + set_curr_insn_source_location (location_from_locus (true_edge->goto_locus)); + set_curr_insn_block (true_edge->goto_block); + true_edge->goto_locus = curr_insn_locator (); + } + true_edge->goto_block = NULL; false_edge->flags |= EDGE_FALLTHRU; return NULL; } @@ -1346,7 +1351,12 @@ expand_gimple_cond_expr (basic_block bb, add_reg_br_prob_note (last, false_edge->probability); maybe_dump_rtl_for_tree_stmt (stmt, last); if (false_edge->goto_locus) - set_curr_insn_source_location (location_from_locus (false_edge->goto_locus)); + { + set_curr_insn_source_location (location_from_locus (false_edge->goto_locus)); + set_curr_insn_block (false_edge->goto_block); + false_edge->goto_locus = curr_insn_locator (); + } + false_edge->goto_block = NULL; true_edge->flags |= EDGE_FALLTHRU; return NULL; } @@ -1354,6 +1364,13 @@ expand_gimple_cond_expr (basic_block bb, jumpif (pred, label_rtx_for_bb (true_edge->dest)); add_reg_br_prob_note (last, true_edge->probability); last = get_last_insn (); + if (false_edge->goto_locus) + { + set_curr_insn_source_location (location_from_locus (false_edge->goto_locus)); + set_curr_insn_block (false_edge->goto_block); + false_edge->goto_locus = curr_insn_locator (); + } + false_edge->goto_block = NULL; emit_jump (label_rtx_for_bb (false_edge->dest)); BB_END (bb) = last; @@ -1376,9 +1393,6 @@ expand_gimple_cond_expr (basic_block bb, maybe_dump_rtl_for_tree_stmt (stmt, last2); - if (false_edge->goto_locus) - set_curr_insn_source_location (location_from_locus (false_edge->goto_locus)); - return new_bb; } @@ -1633,19 +1647,21 @@ expand_gimple_basic_block (basic_block b } } - /* Expand implicit goto. */ + /* Expand implicit goto and convert goto_locus. */ FOR_EACH_EDGE (e, ei, bb->succs) { - if (e->flags & EDGE_FALLTHRU) - break; - } - - if (e && e->dest != bb->next_bb) - { - emit_jump (label_rtx_for_bb (e->dest)); - if (e->goto_locus) - set_curr_insn_source_location (location_from_locus (e->goto_locus)); - e->flags &= ~EDGE_FALLTHRU; + if (e->goto_locus && e->goto_block) + { + set_curr_insn_source_location (location_from_locus (e->goto_locus)); + set_curr_insn_block (e->goto_block); + e->goto_locus = curr_insn_locator (); + } + e->goto_block = NULL; + if ((e->flags & EDGE_FALLTHRU) && e->dest != bb->next_bb) + { + emit_jump (label_rtx_for_bb (e->dest)); + e->flags &= ~EDGE_FALLTHRU; + } } do_pending_stack_adjust (); Index: gcc/cfgcleanup.c =================================================================== --- gcc/cfgcleanup.c.orig 2008-02-19 10:56:00.000000000 +0100 +++ gcc/cfgcleanup.c 2011-09-16 17:35:45.000000000 +0200 @@ -428,7 +428,7 @@ try_forward_edges (int mode, basic_block for (ei = ei_start (b->succs); (e = ei_safe_edge (ei)); ) { basic_block target, first; - int counter; + int counter, goto_locus; bool threaded = false; int nthreaded_edges = 0; bool may_thread = first_pass | df_get_bb_dirty (b); @@ -446,6 +446,7 @@ try_forward_edges (int mode, basic_block target = first = e->dest; counter = NUM_FIXED_BLOCKS; + goto_locus = e->goto_locus; /* If we are partitioning hot/cold basic_blocks, we don't want to mess up jumps that cross between hot/cold sections. @@ -475,6 +476,27 @@ try_forward_edges (int mode, basic_block new_target = single_succ (target); if (target == new_target) counter = n_basic_blocks; + else if (!optimize) + { + /* When not optimizing, ensure that edges or forwarder + blocks with different locus are not optimized out. */ + int locus = single_succ_edge (target)->goto_locus; + + if (locus && goto_locus && locus != goto_locus) + counter = n_basic_blocks; + else if (locus) + goto_locus = locus; + + if (INSN_P (BB_END (target))) + { + locus = INSN_LOCATOR (BB_END (target)); + + if (locus && goto_locus && locus != goto_locus) + counter = n_basic_blocks; + else if (locus) + goto_locus = locus; + } + } } /* Allow to thread only over one edge at time to simplify updating @@ -538,6 +560,8 @@ try_forward_edges (int mode, basic_block int edge_frequency; int n = 0; + e->goto_locus = goto_locus; + /* Don't force if target is exit block. */ if (threaded && target != EXIT_BLOCK_PTR) { Index: gcc/cfglayout.c =================================================================== --- gcc/cfglayout.c.orig 2008-02-19 10:56:00.000000000 +0100 +++ gcc/cfglayout.c 2011-09-16 17:35:45.000000000 +0200 @@ -888,6 +888,46 @@ fixup_reorder_chain (void) if (e && !can_fallthru (e->src, e->dest)) force_nonfallthru (e); } + + /* Ensure goto_locus from edges has some instructions with that locus + in RTL. */ + if (!optimize) + FOR_EACH_BB (bb) + { + edge e; + edge_iterator ei; + + FOR_EACH_EDGE (e, ei, bb->succs) + if (e->goto_locus && !(e->flags & EDGE_ABNORMAL)) + { + basic_block nb; + + if (simplejump_p (BB_END (e->src))) + { + if (INSN_LOCATOR (BB_END (e->src)) == (int) e->goto_locus) + continue; + if (INSN_LOCATOR (BB_END (e->src)) == 0) + { + INSN_LOCATOR (BB_END (e->src)) = e->goto_locus; + continue; + } + } + if (e->dest != EXIT_BLOCK_PTR) + { + insn = BB_HEAD (e->dest); + if (!INSN_P (insn)) + insn = next_insn (insn); + if (insn && INSN_P (insn) + && INSN_LOCATOR (insn) == (int) e->goto_locus) + continue; + } + nb = split_edge (e); + if (!INSN_P (BB_END (nb))) + BB_END (nb) = emit_insn_after_noloc (gen_nop (), BB_END (nb), + nb); + INSN_LOCATOR (BB_END (nb)) = e->goto_locus; + } + } } /* Perform sanity checks on the insn chain. Index: gcc/basic-block.h =================================================================== --- gcc/basic-block.h.orig 2008-02-19 10:56:00.000000000 +0100 +++ gcc/basic-block.h 2011-09-16 17:50:58.000000000 +0200 @@ -129,7 +129,8 @@ struct edge_def GTY(()) /* Auxiliary info specific to a pass. */ PTR GTY ((skip (""))) aux; - /* Location of any goto implicit in the edge, during tree-ssa. */ + /* Location of any goto implicit in the edge and associated BLOCK. */ + tree goto_block; source_locus goto_locus; /* The index number corresponding to this edge in the edge vector Index: gcc/tree-cfg.c =================================================================== --- gcc/tree-cfg.c.orig 2009-07-01 12:59:08.000000000 +0200 +++ gcc/tree-cfg.c 2011-09-16 18:06:42.000000000 +0200 @@ -633,6 +633,7 @@ make_cond_expr_edges (basic_block bb) #else e->goto_locus = EXPR_LOCUS (COND_EXPR_THEN (entry)); #endif + e->goto_block = TREE_BLOCK (COND_EXPR_THEN (entry)); e = make_edge (bb, else_bb, EDGE_FALSE_VALUE); if (e) { @@ -641,6 +642,7 @@ make_cond_expr_edges (basic_block bb) #else e->goto_locus = EXPR_LOCUS (COND_EXPR_ELSE (entry)); #endif + e->goto_block = TREE_BLOCK (COND_EXPR_ELSE (entry)); } /* We do not need the gotos anymore. */ @@ -840,6 +842,7 @@ make_goto_expr_edges (basic_block bb) #else e->goto_locus = EXPR_LOCUS (goto_t); #endif + e->goto_block = TREE_BLOCK (goto_t); bsi_remove (&last, true); return; } @@ -5875,6 +5878,14 @@ move_block_to_fn (struct function *dest_ update_stmt (stmt); pop_cfun (); } + + FOR_EACH_EDGE (e, ei, bb->succs) + if (e->goto_locus) + { + /* 4.4 has better code here, as d.block contains not only the new + outer block, but sometimes others. */ + e->goto_block = d.block; + } } /* Examine the statements in BB (which is in SRC_CFUN); find and return Index: gcc/cfgrtl.c =================================================================== --- gcc/cfgrtl.c.orig 2009-05-26 12:15:16.000000000 +0200 +++ gcc/cfgrtl.c 2011-09-16 17:35:45.000000000 +0200 @@ -1027,6 +1027,7 @@ force_nonfallthru_and_redirect (edge e, rtx note; edge new_edge; int abnormal_edge_flags = 0; + int loc; /* In the case the last instruction is conditional jump to the next instruction, first redirect the jump itself and then continue @@ -1149,11 +1150,15 @@ force_nonfallthru_and_redirect (edge e, else jump_block = e->src; + if (e->goto_locus && e->goto_block == NULL) + loc = e->goto_locus; + else + loc = 0; e->flags &= ~EDGE_FALLTHRU; if (target == EXIT_BLOCK_PTR) { #ifdef HAVE_return - emit_jump_insn_after_noloc (gen_return (), BB_END (jump_block)); + emit_jump_insn_after_setloc (gen_return (), BB_END (jump_block), loc); #else gcc_unreachable (); #endif @@ -1161,7 +1166,7 @@ force_nonfallthru_and_redirect (edge e, else { rtx label = block_label (target); - emit_jump_insn_after_noloc (gen_jump (label), BB_END (jump_block)); + emit_jump_insn_after_setloc (gen_jump (label), BB_END (jump_block), loc); JUMP_LABEL (BB_END (jump_block)) = label; LABEL_NUSES (label)++; } @@ -2629,6 +2634,32 @@ cfg_layout_merge_blocks (basic_block a, try_redirect_by_replacing_jump (EDGE_SUCC (a, 0), b, true); gcc_assert (!JUMP_P (BB_END (a))); + /* When not optimizing and the edge is the only place in RTL which holds + some unique locus, emit a nop with that locus in between. */ + if (!optimize && EDGE_SUCC (a, 0)->goto_locus) + { + rtx insn = BB_END (a); + int goto_locus = EDGE_SUCC (a, 0)->goto_locus; + + if (NOTE_P (insn)) + insn = prev_nonnote_insn (insn); + if (insn && INSN_P (insn) && INSN_LOCATOR (insn) == goto_locus) + goto_locus = 0; + else + { + insn = BB_HEAD (b); + if (!INSN_P (insn)) + insn = next_insn (insn); + if (insn && INSN_P (insn) && INSN_LOCATOR (insn) == goto_locus) + goto_locus = 0; + } + if (goto_locus) + { + BB_END (a) = emit_insn_after_noloc (gen_nop (), BB_END (a), a); + INSN_LOCATOR (BB_END (a)) = goto_locus; + } + } + /* Possible line number notes should appear in between. */ if (b->il.rtl->header) {
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