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| author | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2003-12-16 07:50:31 +0000 |
|---|---|---|
| committer | Eric Botcazou <ebotcazou@gcc.gnu.org> | 2003-12-16 07:50:31 +0000 |
| commit | 91f8389c1b40190eee416a559f99a9e767698c11 (patch) | |
| tree | df19e512684786a7c142dbc4c1613405ad3a5069 /gcc/combine.c | |
| parent | cbefa3c9a2b880ccab4954e7e0f8c8d571d89d31 (diff) | |
| download | gcc-91f8389c1b40190eee416a559f99a9e767698c11.zip gcc-91f8389c1b40190eee416a559f99a9e767698c11.tar.gz gcc-91f8389c1b40190eee416a559f99a9e767698c11.tar.bz2 | |
re PR rtl-optimization/13313 (Wrong code generated)
PR optimization/13313
* combine.c (make_extraction) [REG]: Do not use
gen_lowpart_for_combine when POS is non-zero.
From-SVN: r74676
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index 02a92c1..2c92d24 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -6043,10 +6043,11 @@ make_extraction (enum machine_mode mode, rtx inner, HOST_WIDE_INT pos, { if (tmode != inner_mode) { - if (in_dest) + /* We can't call gen_lowpart_for_combine in a DEST since we + always want a SUBREG (see below) and it would sometimes + return a new hard register. */ + if (pos || in_dest) { - /* We can't call gen_lowpart_for_combine here since we always want - a SUBREG and it would sometimes return a new hard register. */ HOST_WIDE_INT final_word = pos / BITS_PER_WORD; if (WORDS_BIG_ENDIAN |