diff options
| author | Vladimir Makarov <vmakarov@redhat.com> | 2016-08-02 20:57:04 +0000 |
|---|---|---|
| committer | Vladimir Makarov <vmakarov@gcc.gnu.org> | 2016-08-02 20:57:04 +0000 |
| commit | 00803109af736deacbec676f03564c7cafce7eea (patch) | |
| tree | f040ca79165d580721f860540c3cca7ef82f89a2 /gcc/lra-spills.c | |
| parent | 589a30d1a4f66b49c04497290d8c19f88a815f8c (diff) | |
| download | gcc-00803109af736deacbec676f03564c7cafce7eea.tar.gz | |
re PR rtl-optimization/72778 (internal compiler error: in create_pre_exit, at mode-switching.c:451)
2016-08-02 Vladimir Makarov <vmakarov@redhat.com>
PR middle-end/72778
* lra-spills.c (regno_in_use_p): New.
(lra_final_code_change): Use it.
From-SVN: r239000
Diffstat (limited to 'gcc/lra-spills.c')
| -rw-r--r-- | gcc/lra-spills.c | 22 |
1 files changed, 16 insertions, 6 deletions
diff --git a/gcc/lra-spills.c b/gcc/lra-spills.c index 1801b7bb391..a5073b69f46 100644 --- a/gcc/lra-spills.c +++ b/gcc/lra-spills.c @@ -686,6 +686,20 @@ return_regno_p (unsigned int regno) return false; } +/* Return true if REGNO is one of subsequent USE after INSN. */ +static bool +regno_in_use_p (rtx_insn *insn, unsigned int regno) +{ + while ((insn = next_nondebug_insn (insn)) != NULL_RTX + && INSN_P (insn) && GET_CODE (PATTERN (insn)) == USE) + { + if (REG_P (XEXP (PATTERN (insn), 0)) + && regno == REGNO (XEXP (PATTERN (insn), 0))) + return TRUE; + } + return false; +} + /* Final change of pseudos got hard registers into the corresponding hard registers and removing temporary clobbers. */ void @@ -693,7 +707,7 @@ lra_final_code_change (void) { int i, hard_regno; basic_block bb; - rtx_insn *insn, *curr, *next_insn; + rtx_insn *insn, *curr; int max_regno = max_reg_num (); for (i = FIRST_PSEUDO_REGISTER; i < max_regno; i++) @@ -728,11 +742,7 @@ lra_final_code_change (void) && REG_P (SET_SRC (pat)) && REG_P (SET_DEST (pat)) && REGNO (SET_SRC (pat)) == REGNO (SET_DEST (pat)) && (! return_regno_p (REGNO (SET_SRC (pat))) - || (next_insn = next_nondebug_insn (insn)) == NULL_RTX - || ! INSN_P (next_insn) - || GET_CODE (PATTERN (next_insn)) != USE - || ! REG_P (XEXP (PATTERN (next_insn), 0)) - || REGNO (SET_SRC (pat)) != REGNO (XEXP (PATTERN (next_insn), 0)))) + || ! regno_in_use_p (insn, REGNO (SET_SRC (pat))))) { lra_invalidate_insn_data (insn); delete_insn (insn); |