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| author | Robert Suchanek <robert.suchanek@imgtec.com> | 2015-11-11 10:36:00 +0000 |
|---|---|---|
| committer | Robert Suchanek <rts@gcc.gnu.org> | 2015-11-11 10:36:00 +0000 |
| commit | 394b24ea80626c5464f842f574a57547fb024ad6 (patch) | |
| tree | bb106b1923b1a2acc453a0f8d67b5d3cce408431 /gcc | |
| parent | 6eef39f15bb3ca2de1cddc0d9b48b8644b9d5abc (diff) | |
| download | gcc-394b24ea80626c5464f842f574a57547fb024ad6.zip gcc-394b24ea80626c5464f842f574a57547fb024ad6.tar.gz gcc-394b24ea80626c5464f842f574a57547fb024ad6.tar.bz2 | |
Tighten up checks when tying chains.
gcc/
* regname.c (scan_rtx_reg): Check the matching number of consecutive
registers when tying chains.
(build_def_use): Move terminated_this_insn earlier in the function.
From-SVN: r230149
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/regrename.c | 7 |
2 files changed, 10 insertions, 3 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index e3a0432..21ea2f0 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2015-11-11 Robert Suchanek <robert.suchanek@imgtec.com> + + * regname.c (scan_rtx_reg): Check the matching number of consecutive + registers when tying chains. + (build_def_use): Move terminated_this_insn earlier in the function. + 2015-11-10 Mike Frysinger <vapier@gentoo.org> * configure.ac: Use = with test and not ==. diff --git a/gcc/regrename.c b/gcc/regrename.c index d727dd9..d41410a 100644 --- a/gcc/regrename.c +++ b/gcc/regrename.c @@ -1068,7 +1068,9 @@ scan_rtx_reg (rtx_insn *insn, rtx *loc, enum reg_class cl, enum scan_actions act && GET_CODE (pat) == SET && GET_CODE (SET_DEST (pat)) == REG && GET_CODE (SET_SRC (pat)) == REG - && terminated_this_insn) + && terminated_this_insn + && terminated_this_insn->nregs + == REG_NREGS (recog_data.operand[1])) { gcc_assert (terminated_this_insn->regno == REGNO (recog_data.operand[1])); @@ -1593,6 +1595,7 @@ build_def_use (basic_block bb) enum rtx_code set_code = SET; enum rtx_code clobber_code = CLOBBER; insn_rr_info *insn_info = NULL; + terminated_this_insn = NULL; /* Process the insn, determining its effect on the def-use chains and live hard registers. We perform the following @@ -1749,8 +1752,6 @@ build_def_use (basic_block bb) scan_rtx (insn, &XEXP (note, 0), ALL_REGS, mark_read, OP_INOUT); - terminated_this_insn = NULL; - /* Step 4: Close chains for registers that die here, unless the register is mentioned in a REG_UNUSED note. In that case we keep the chain open until step #7 below to ensure |