diff options
| author | Uros Bizjak <uros@gcc.gnu.org> | 2017-05-13 23:07:49 +0200 |
|---|---|---|
| committer | Uros Bizjak <uros@gcc.gnu.org> | 2017-05-13 23:07:49 +0200 |
| commit | 364490206eaee4e4da9f66e63169cc0c0ddfe40e (patch) | |
| tree | b24bdeaf45d5e675382cbcf6786fe42b8e9698d8 /gcc/compare-elim.c | |
| parent | 2263019d609e05c2689542a917f3b6565bd7cbb0 (diff) | |
| download | gcc-364490206eaee4e4da9f66e63169cc0c0ddfe40e.zip gcc-364490206eaee4e4da9f66e63169cc0c0ddfe40e.tar.gz gcc-364490206eaee4e4da9f66e63169cc0c0ddfe40e.tar.bz2 | |
compare-elim.c (equivalent_reg_at_start): Return NULL_RTX when returned register mode doesn't match original mode.
* compare-elim.c (equivalent_reg_at_start): Return NULL_RTX
when returned register mode doesn't match original mode.
From-SVN: r248009
Diffstat (limited to 'gcc/compare-elim.c')
| -rw-r--r-- | gcc/compare-elim.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/gcc/compare-elim.c b/gcc/compare-elim.c index 69b1de7..b5ce993 100644 --- a/gcc/compare-elim.c +++ b/gcc/compare-elim.c @@ -526,6 +526,7 @@ maybe_select_cc_mode (struct comparison *cmp, rtx a ATTRIBUTE_UNUSED, static rtx equivalent_reg_at_start (rtx reg, rtx_insn *end, rtx_insn *start) { + machine_mode orig_mode = GET_MODE (reg); rtx_insn *bb_head = BB_HEAD (BLOCK_FOR_INSN (end)); for (rtx_insn *insn = PREV_INSN (end); @@ -572,6 +573,9 @@ equivalent_reg_at_start (rtx reg, rtx_insn *end, rtx_insn *start) return NULL_RTX; } + if (GET_MODE (reg) != orig_mode) + return NULL_RTX; + return reg; } |