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| author | J"orn Rennecke <amylaar@cygnus.co.uk> | 1999-08-02 22:50:49 +0000 |
|---|---|---|
| committer | Joern Rennecke <amylaar@gcc.gnu.org> | 1999-08-02 23:50:49 +0100 |
| commit | e76d23764b387e9636b5d568b62531019f7f2273 (patch) | |
| tree | e65c2ce9ff60d923389ab1b4fec1b80c5cc11cb3 /gcc | |
| parent | 39c440fc3829fce3619b8c38b5637648b936f95b (diff) | |
| download | gcc-e76d23764b387e9636b5d568b62531019f7f2273.zip gcc-e76d23764b387e9636b5d568b62531019f7f2273.tar.gz gcc-e76d23764b387e9636b5d568b62531019f7f2273.tar.bz2 | |
loop.c (strength_reduce): When doing biv->giv conversion, fix up reg_biv_class.
* loop.c (strength_reduce): When doing biv->giv conversion, fix up
reg_biv_class.
From-SVN: r28413
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/loop.c | 9 |
2 files changed, 13 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ec35439..d844319 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Mon Aug 2 23:46:45 1999 J"orn Rennecke <amylaar@cygnus.co.uk> + + * loop.c (strength_reduce): When doing biv->giv conversion, fix up + reg_biv_class. + 1999-08-02 Jakub Jelinek <jj@ultra.linux.cz> * config/float-sparc.h: New file. @@ -4072,6 +4072,7 @@ strength_reduce (scan_start, end, loop_top, insn_count, fprintf (loop_dump_stream, "is giv of biv %d\n", bl2->regno); /* Let this giv be discovered by the generic code. */ REG_IV_TYPE (bl->regno) = UNKNOWN_INDUCT; + reg_biv_class[bl->regno] = NULL_PTR; /* We can get better optimization if we can move the giv setting before the first giv use. */ if (dominator @@ -4123,7 +4124,13 @@ strength_reduce (scan_start, end, loop_top, insn_count, } /* Remove this biv from the chain. */ if (bl->next) - *bl = *bl->next; + { + /* We move the following giv from *bl->next into *bl. + We have to update reg_biv_class for that moved biv + to point to its new address. */ + *bl = *bl->next; + reg_biv_class[bl->regno] = bl; + } else { *backbl = 0; |