diff options
| author | bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-07-06 13:36:16 +0000 |
|---|---|---|
| committer | bernds <bernds@138bc75d-0d04-0410-961f-82ee72b054a4> | 2011-07-06 13:36:16 +0000 |
| commit | 6f061208fc5d6d1cdb668fb56b84249d1c96b3a1 (patch) | |
| tree | dac9f2b9f9f4e057938eba339861f1b99af29cc2 /gcc/combine.c | |
| parent | 321583cbf3a8135b2d17cdb1eae83e66c60ac689 (diff) | |
| download | gcc-6f061208fc5d6d1cdb668fb56b84249d1c96b3a1.tar.gz | |
* simplify-rtx.c (simplify_const_binary_operation): Use the
shift_truncation_mask hook instead of performing modulo by
width. Compare against mode precision, not bitsize.
* combine.c (combine_simplify_rtx, simplify_shift_const_1):
Use shift_truncation_mask instead of constructing the value
manually.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@175913 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 6 |
1 files changed, 2 insertions, 4 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index ba35f280fcd..737f300b063 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -5946,9 +5946,7 @@ combine_simplify_rtx (rtx x, enum machine_mode op0_mode, int in_dest, else if (SHIFT_COUNT_TRUNCATED && !REG_P (XEXP (x, 1))) SUBST (XEXP (x, 1), force_to_mode (XEXP (x, 1), GET_MODE (XEXP (x, 1)), - ((unsigned HOST_WIDE_INT) 1 - << exact_log2 (GET_MODE_BITSIZE (GET_MODE (x)))) - - 1, + targetm.shift_truncation_mask (GET_MODE (x)), 0)); break; @@ -9901,7 +9899,7 @@ simplify_shift_const_1 (enum rtx_code code, enum machine_mode result_mode, want to do this inside the loop as it makes it more difficult to combine shifts. */ if (SHIFT_COUNT_TRUNCATED) - orig_count &= GET_MODE_BITSIZE (mode) - 1; + orig_count &= targetm.shift_truncation_mask (mode); /* If we were given an invalid count, don't do anything except exactly what was requested. */ |