diff options
Diffstat (limited to 'gcc/function.c')
| -rw-r--r-- | gcc/function.c | 38 |
1 files changed, 31 insertions, 7 deletions
diff --git a/gcc/function.c b/gcc/function.c index 62e72eb2a9f..20c287bc8e0 100644 --- a/gcc/function.c +++ b/gcc/function.c @@ -77,6 +77,8 @@ along with GCC; see the file COPYING3. If not see #include "rtl-chkp.h" #include "tree-dfa.h" #include "tree-ssa.h" +#include "stringpool.h" +#include "attribs.h" /* So we can assign to cfun in this file. */ #undef cfun @@ -6048,20 +6050,42 @@ thread_prologue_and_epilogue_insns (void) if (split_prologue_seq || prologue_seq) { + rtx_insn *split_prologue_insn = split_prologue_seq; if (split_prologue_seq) - insert_insn_on_edge (split_prologue_seq, orig_entry_edge); + { + while (split_prologue_insn && !NONDEBUG_INSN_P (split_prologue_insn)) + split_prologue_insn = NEXT_INSN (split_prologue_insn); + insert_insn_on_edge (split_prologue_seq, orig_entry_edge); + } + rtx_insn *prologue_insn = prologue_seq; if (prologue_seq) - insert_insn_on_edge (prologue_seq, entry_edge); + { + while (prologue_insn && !NONDEBUG_INSN_P (prologue_insn)) + prologue_insn = NEXT_INSN (prologue_insn); + insert_insn_on_edge (prologue_seq, entry_edge); + } commit_edge_insertions (); /* Look for basic blocks within the prologue insns. */ - auto_sbitmap blocks (last_basic_block_for_fn (cfun)); - bitmap_clear (blocks); - bitmap_set_bit (blocks, entry_edge->dest->index); - bitmap_set_bit (blocks, orig_entry_edge->dest->index); - find_many_sub_basic_blocks (blocks); + if (split_prologue_insn + && BLOCK_FOR_INSN (split_prologue_insn) == NULL) + split_prologue_insn = NULL; + if (prologue_insn + && BLOCK_FOR_INSN (prologue_insn) == NULL) + prologue_insn = NULL; + if (split_prologue_insn || prologue_insn) + { + auto_sbitmap blocks (last_basic_block_for_fn (cfun)); + bitmap_clear (blocks); + if (split_prologue_insn) + bitmap_set_bit (blocks, + BLOCK_FOR_INSN (split_prologue_insn)->index); + if (prologue_insn) + bitmap_set_bit (blocks, BLOCK_FOR_INSN (prologue_insn)->index); + find_many_sub_basic_blocks (blocks); + } } default_rtl_profile (); |