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| author | J"orn Rennecke <joern.rennecke@superh.com> | 2002-07-22 14:29:28 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 2002-07-22 15:29:28 +0100 |
| commit | eab2120d5efebd6b7c29730692ff165b471b7eac (patch) | |
| tree | e276a9a3f88aafec442b7f818b014c0df9cf4b90 /gcc | |
| parent | 0e902d98aee5f7d4f4ac9baf639d2fad0eaa848e (diff) | |
| download | gcc-eab2120d5efebd6b7c29730692ff165b471b7eac.zip gcc-eab2120d5efebd6b7c29730692ff165b471b7eac.tar.gz gcc-eab2120d5efebd6b7c29730692ff165b471b7eac.tar.bz2 | |
rtlanal.c (subreg_regno_offset): Return correct offset for big endian paradoxical subregs.
* rtlanal.c (subreg_regno_offset): Return correct offset for
big endian paradoxical subregs.
From-SVN: r55650
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/rtlanal.c | 10 |
2 files changed, 14 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 1f413bb..398ce73 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,4 +1,7 @@ -Mon Jul 22 15:21:41 2002 J"orn Rennecke <joern.rennecke@superh.com> +Mon Jul 22 15:27:25 2002 J"orn Rennecke <joern.rennecke@superh.com> + + * rtlanal.c (subreg_regno_offset): Return correct offset for + big endian paradoxical subregs. * optabs.c (expand_vector_unop): Don't expand using sub_optab if we got the wrong mode. diff --git a/gcc/rtlanal.c b/gcc/rtlanal.c index de7efae..c1fdb76 100644 --- a/gcc/rtlanal.c +++ b/gcc/rtlanal.c @@ -3117,6 +3117,16 @@ subreg_regno_offset (xregno, xmode, offset, ymode) nregs_xmode = HARD_REGNO_NREGS (xregno, xmode); nregs_ymode = HARD_REGNO_NREGS (xregno, ymode); + + /* If this is a big endian paradoxical subreg, which uses more actual + hard registers than the original register, we must return a negative + offset so that we find the proper highpart of the register. */ + if (offset == 0 + && nregs_ymode > nregs_xmode + && (GET_MODE_SIZE (ymode) > UNITS_PER_WORD + ? WORDS_BIG_ENDIAN : BYTES_BIG_ENDIAN)) + return nregs_xmode - nregs_ymode; + if (offset == 0 || nregs_xmode == nregs_ymode) return 0; |