diff options
Diffstat (limited to 'gcc/ifcvt.c')
| -rw-r--r-- | gcc/ifcvt.c | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/gcc/ifcvt.c b/gcc/ifcvt.c index cf3d245..0fcacb6 100644 --- a/gcc/ifcvt.c +++ b/gcc/ifcvt.c @@ -3796,6 +3796,7 @@ find_if_case_1 (basic_block test_bb, edge then_edge, edge else_edge) basic_block then_bb = then_edge->dest; basic_block else_bb = else_edge->dest; basic_block new_bb; + rtx else_target = NULL_RTX; int then_bb_index; /* If we are partitioning hot/cold basic blocks, we don't want to @@ -3845,6 +3846,13 @@ find_if_case_1 (basic_block test_bb, edge then_edge, edge else_edge) predictable_edge_p (then_edge))))) return FALSE; + if (else_bb == EXIT_BLOCK_PTR) + { + rtx jump = BB_END (else_edge->src); + gcc_assert (JUMP_P (jump)); + else_target = JUMP_LABEL (jump); + } + /* Registers set are dead, or are predicable. */ if (! dead_or_predicable (test_bb, then_bb, else_bb, single_succ_edge (then_bb), 1)) @@ -3864,6 +3872,9 @@ find_if_case_1 (basic_block test_bb, edge then_edge, edge else_edge) redirect_edge_succ (FALLTHRU_EDGE (test_bb), else_bb); new_bb = 0; } + else if (else_bb == EXIT_BLOCK_PTR) + new_bb = force_nonfallthru_and_redirect (FALLTHRU_EDGE (test_bb), + else_bb, else_target); else new_bb = redirect_edge_and_branch_force (FALLTHRU_EDGE (test_bb), else_bb); |