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| author | bonzini <bonzini@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-03-21 14:30:51 +0000 |
|---|---|---|
| committer | bonzini <bonzini@138bc75d-0d04-0410-961f-82ee72b054a4> | 2005-03-21 14:30:51 +0000 |
| commit | 8666c3913a18243341907aa05523d93f97d5610f (patch) | |
| tree | 681954762b33192c42f1a60a5211b189369f90af /gcc/rtlhooks.c | |
| parent | 9a5f6cddc29f9ac3fdeab67a4001d9fcb432f56c (diff) | |
| download | gcc-8666c3913a18243341907aa05523d93f97d5610f.tar.gz | |
2005-03-21 Paolo Bonzini <bonzini@gnu.org>
* rtl.h (struct rtx_hooks): Add gen_lowpart_no_emit.
* rtlhooks.c (gen_lowpart_no_emit_general): New.
* rtlhooks-def.h (gen_lowpart_no_emit_general): Declare.
(RTL_HOOKS_GEN_LOWPART_NO_EMIT): New.
* simplify-rtx.c (simplify_binary_operation_1): Use it.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@96799 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/rtlhooks.c')
| -rw-r--r-- | gcc/rtlhooks.c | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/gcc/rtlhooks.c b/gcc/rtlhooks.c index 49d4cfe7c59..5303af54716 100644 --- a/gcc/rtlhooks.c +++ b/gcc/rtlhooks.c @@ -79,6 +79,19 @@ gen_lowpart_general (enum machine_mode mode, rtx x) } } +/* Similar to gen_lowpart, but cannot emit any instruction via + copy_to_reg or force_reg. Mainly used in simplify-rtx.c. */ +rtx +gen_lowpart_no_emit_general (enum machine_mode mode, rtx x) +{ + rtx result = gen_lowpart_common (mode, x); + if (result) + return result; + if (mode != GET_MODE (x) && GET_MODE (x) != VOIDmode) + return gen_lowpart_SUBREG (mode, x); + return x; +} + rtx reg_num_sign_bit_copies_general (rtx x ATTRIBUTE_UNUSED, enum machine_mode mode ATTRIBUTE_UNUSED, |