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| author | J"orn Rennecke <joern.rennecke@superh.com> | 2002-07-11 21:03:51 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 2002-07-11 22:03:51 +0100 |
| commit | 25c25947019a3e4628e8b382d7e1b00d9482d717 (patch) | |
| tree | 470152215f717097fe37cefea6c2ed340f8da478 /gcc/combine.c | |
| parent | bb654703036e9c948296d147eafb8191ec64b923 (diff) | |
| download | gcc-25c25947019a3e4628e8b382d7e1b00d9482d717.zip gcc-25c25947019a3e4628e8b382d7e1b00d9482d717.tar.gz gcc-25c25947019a3e4628e8b382d7e1b00d9482d717.tar.bz2 | |
combine.c (try_combine): When converting a paradoxical subreg to an extension...
* combine.c (try_combine): When converting a paradoxical subreg
to an extension, take LOAD_EXTEND_OP into account.
From-SVN: r55404
Diffstat (limited to 'gcc/combine.c')
| -rw-r--r-- | gcc/combine.c | 15 |
1 files changed, 13 insertions, 2 deletions
diff --git a/gcc/combine.c b/gcc/combine.c index e7f2255..cd2e8df 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -2283,8 +2283,19 @@ try_combine (i3, i2, i1, new_direct_jump_p) /* If *SPLIT is a paradoxical SUBREG, when we split it, it should be written as a ZERO_EXTEND. */ if (split_code == SUBREG && GET_CODE (SUBREG_REG (*split)) == MEM) - SUBST (*split, gen_rtx_ZERO_EXTEND (split_mode, - SUBREG_REG (*split))); + { +#ifdef LOAD_EXTEND_OP + /* Or as a SIGN_EXTEND if LOAD_EXTEND_OP says that that's + what it really is. */ + if (LOAD_EXTEND_OP (GET_MODE (SUBREG_REG (*split))) + == SIGN_EXTEND) + SUBST (*split, gen_rtx_SIGN_EXTEND (split_mode, + SUBREG_REG (*split))); + else +#endif + SUBST (*split, gen_rtx_ZERO_EXTEND (split_mode, + SUBREG_REG (*split))); + } #endif newi2pat = gen_rtx_SET (VOIDmode, newdest, *split); |