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| author | wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4> | 1994-07-03 01:14:43 +0000 |
|---|---|---|
| committer | wilson <wilson@138bc75d-0d04-0410-961f-82ee72b054a4> | 1994-07-03 01:14:43 +0000 |
| commit | 124df6e0f685975fa2c6bd7fe64d7a03c5f9516a (patch) | |
| tree | b6c065365a005bbc4a112ca043ca60d838e08b9e /gcc/unroll.c | |
| parent | 0b9871981339ed06116e06fb17eae6472ba90a91 (diff) | |
| download | gcc-124df6e0f685975fa2c6bd7fe64d7a03c5f9516a.tar.gz | |
(loop_iterations): Only use REG_EQUAL note value if it
is constant.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@7648 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 3f628bddc8a..9b968ac9696 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -3160,7 +3160,11 @@ loop_iterations (loop_start, loop_end) { rtx note = find_reg_note (insn, REG_EQUAL, NULL_RTX); - if (note && GET_CODE (XEXP (note, 0)) != EXPR_LIST) + /* Only use the REG_EQUAL note if it is a constant. + Other things, divide in particular, will cause + problems later if we use them. */ + if (note && GET_CODE (XEXP (note, 0)) != EXPR_LIST + && CONSTANT_P (XEXP (note, 0))) comparison_value = XEXP (note, 0); } break; |