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| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-04-02 01:56:17 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 1998-04-02 01:56:17 +0000 |
| commit | f31c6cbf8af08b5e6ede02c4080f36aac962e162 (patch) | |
| tree | 922ce3c162ba7fe51d2e1c2fb79adbdb13372e37 /gcc/final.c | |
| parent | cfff67e27f79bd39593fe5c99f3bb58161c1267c (diff) | |
| download | gcc-f31c6cbf8af08b5e6ede02c4080f36aac962e162.tar.gz | |
* final.c (alter_subreg): Allow the target to hook by-mode subreg
hard register number changes.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@18946 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/final.c')
| -rw-r--r-- | gcc/final.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/gcc/final.c b/gcc/final.c index 74a6d15d743..6b851f20be7 100644 --- a/gcc/final.c +++ b/gcc/final.c @@ -2891,9 +2891,20 @@ alter_subreg (x) if (GET_CODE (y) == REG) { - /* If the containing reg really gets a hard reg, so do we. */ + /* If the word size is larger than the size of this register, + adjust the register number to compensate. */ + /* ??? Note that this just catches stragglers created by/for + integrate. It would be better if we either caught these + earlier, or kept _all_ subregs until now and eliminate + gen_lowpart and friends. */ + PUT_CODE (x, REG); +#ifdef ALTER_HARD_SUBREG + REGNO (x) = ALTER_HARD_SUBREG(GET_MODE (x), SUBREG_WORD (x), + GET_MODE (y), REGNO (y)); +#else REGNO (x) = REGNO (y) + SUBREG_WORD (x); +#endif } else if (GET_CODE (y) == MEM) { |