diff options
| author | Jakub Jelinek <jakub@redhat.com> | 2018-03-16 22:01:16 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2018-03-16 22:01:16 +0100 |
| commit | 927fb0bc9b915bbe32b4d137adbbcdd3375e119a (patch) | |
| tree | 6b3bc9dd4c8e250c0bf6a184d3e767e7be181185 /gcc/postreload.c | |
| parent | ce811fc49bb470856f6c4953c071d5b3db6485bb (diff) | |
| download | gcc-927fb0bc9b915bbe32b4d137adbbcdd3375e119a.zip gcc-927fb0bc9b915bbe32b4d137adbbcdd3375e119a.tar.gz gcc-927fb0bc9b915bbe32b4d137adbbcdd3375e119a.tar.bz2 | |
re PR target/84899 (ICE: in final_scan_insn_1, at final.c:3139 (error: could not split insn))
PR target/84899
* postreload.c (reload_combine_recognize_pattern): Perform
INTVAL addition in unsigned HOST_WIDE_INT type to avoid UB and
truncate_int_for_mode the result for the destination's mode.
* gcc.dg/pr84899.c: New test.
From-SVN: r258610
Diffstat (limited to 'gcc/postreload.c')
| -rw-r--r-- | gcc/postreload.c | 12 |
1 files changed, 7 insertions, 5 deletions
diff --git a/gcc/postreload.c b/gcc/postreload.c index af9ad82..0638709 100644 --- a/gcc/postreload.c +++ b/gcc/postreload.c @@ -1157,11 +1157,13 @@ reload_combine_recognize_pattern (rtx_insn *insn) value in PREV, the constant loading instruction. */ validate_change (prev, &SET_DEST (prev_set), index_reg, 1); if (reg_state[regno].offset != const0_rtx) - validate_change (prev, - &SET_SRC (prev_set), - GEN_INT (INTVAL (SET_SRC (prev_set)) - + INTVAL (reg_state[regno].offset)), - 1); + { + HOST_WIDE_INT c + = trunc_int_for_mode (UINTVAL (SET_SRC (prev_set)) + + UINTVAL (reg_state[regno].offset), + GET_MODE (index_reg)); + validate_change (prev, &SET_SRC (prev_set), GEN_INT (c), 1); + } /* Now for every use of REG that we have recorded, replace REG with REG_SUM. */ |