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| author | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-05-02 07:13:49 +0000 |
|---|---|---|
| committer | jakub <jakub@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-05-02 07:13:49 +0000 |
| commit | 559f753b89b09661db0428811fcc914ca150616a (patch) | |
| tree | ded425eea0d88fb780f3a7aa47e92d5c227063ad /gcc/ree.c | |
| parent | 00d491c0d562a76b1909e33865f0e8c35247decc (diff) | |
| download | gcc-559f753b89b09661db0428811fcc914ca150616a.tar.gz | |
PR rtl-optimization/53160
* ree.c (combine_reaching_defs): Handle the case where cand->insn
has been modified by ree pass already.
* gcc.c-torture/execute/pr53160.c: New test.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@187035 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/ree.c')
| -rw-r--r-- | gcc/ree.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/gcc/ree.c b/gcc/ree.c index 86fd900213a..25ee7e263db 100644 --- a/gcc/ree.c +++ b/gcc/ree.c @@ -667,6 +667,24 @@ combine_reaching_defs (ext_cand *cand, const_rtx set_pat, ext_state *state) if (!outcome) return false; + /* If cand->insn has been already modified, update cand->mode to a wider + mode if possible, or punt. */ + if (state->modified[INSN_UID (cand->insn)].kind != EXT_MODIFIED_NONE) + { + enum machine_mode mode; + rtx set; + + if (state->modified[INSN_UID (cand->insn)].kind + != (cand->code == ZERO_EXTEND + ? EXT_MODIFIED_ZEXT : EXT_MODIFIED_SEXT) + || state->modified[INSN_UID (cand->insn)].mode != cand->mode + || (set = single_set (cand->insn)) == NULL_RTX) + return false; + mode = GET_MODE (SET_DEST (set)); + gcc_assert (GET_MODE_SIZE (mode) >= GET_MODE_SIZE (cand->mode)); + cand->mode = mode; + } + merge_successful = true; /* Go through the defs vector and try to merge all the definitions |