diff options
| author | ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-04-01 20:46:30 +0000 |
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| committer | ebotcazou <ebotcazou@138bc75d-0d04-0410-961f-82ee72b054a4> | 2009-04-01 20:46:30 +0000 |
| commit | 959aa063a150a3f577d69730e94f7c363f904d8c (patch) | |
| tree | 4fd3653042cd7b017ac9cd6a959417dfec967094 /gcc/combine.c | |
| parent | 9e0aee4b7f780a7379224827264830684587d328 (diff) | |
| download | gcc-959aa063a150a3f577d69730e94f7c363f904d8c.tar.gz | |
PR rtl-optimization/39588
* combine.c (merge_outer_ops): Do not set the constant when this
is not necessary.
(simplify_shift_const_1): Do not modify it either in this case.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@145430 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 3ce8a75ca2f..80187347aed 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -8971,13 +8971,13 @@ merge_outer_ops (enum rtx_code *pop0, HOST_WIDE_INT *pconst0, enum rtx_code op1, && op0 == AND) op0 = UNKNOWN; + *pop0 = op0; + /* ??? Slightly redundant with the above mask, but not entirely. Moving this above means we'd have to sign-extend the mode mask for the final test. */ - const0 = trunc_int_for_mode (const0, mode); - - *pop0 = op0; - *pconst0 = const0; + if (op0 != UNKNOWN && op0 != NEG) + *pconst0 = trunc_int_for_mode (const0, mode); return 1; } @@ -9700,7 +9700,8 @@ simplify_shift_const_1 (enum rtx_code code, enum machine_mode result_mode, if (outer_op != UNKNOWN) { - if (GET_MODE_BITSIZE (result_mode) < HOST_BITS_PER_WIDE_INT) + if (GET_RTX_CLASS (outer_op) != RTX_UNARY + && GET_MODE_BITSIZE (result_mode) < HOST_BITS_PER_WIDE_INT) outer_const = trunc_int_for_mode (outer_const, result_mode); if (outer_op == AND) |