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| author | Clinton Popetz <cpopetz@cygnus.com> | 2000-04-14 00:41:31 +0000 |
|---|---|---|
| committer | Clinton Popetz <cpopetz@gcc.gnu.org> | 2000-04-13 20:41:31 -0400 |
| commit | 4b5e8abe18f9afc7a184e184182a609da1f819f0 (patch) | |
| tree | a51aa7adf842d0029fca90fbf81d83bd646c81b0 | |
| parent | 460f6b71942e7245fdc14eed44db51291ec281be (diff) | |
| download | gcc-4b5e8abe18f9afc7a184e184182a609da1f819f0.zip gcc-4b5e8abe18f9afc7a184e184182a609da1f819f0.tar.gz gcc-4b5e8abe18f9afc7a184e184182a609da1f819f0.tar.bz2 | |
emit-rtl.c (try_split): Avoid infinite loop if the split results in a sequence that contains the...
* emit-rtl.c (try_split): Avoid infinite loop if the split
results in a sequence that contains the original insn.
From-SVN: r33143
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/emit-rtl.c | 10 |
2 files changed, 14 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 0b3925f..a356333 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +Thu Apr 13 19:39:56 2000 Clinton Popetz <cpopetz@cygnus.com> + + * emit-rtl.c (try_split): Avoid infinite loop if the split + results in a sequence that contains the original insn. + 2000-04-13 Andreas Jaeger <aj@suse.de> * config/mips/mips.c (expand_block_move): Pass alignment diff --git a/gcc/emit-rtl.c b/gcc/emit-rtl.c index e697d55..8fd559c 100644 --- a/gcc/emit-rtl.c +++ b/gcc/emit-rtl.c @@ -2336,10 +2336,18 @@ try_split (pat, trial, last) it, in turn, will be split (SFmode on the 29k is an example). */ if (GET_CODE (seq) == SEQUENCE) { + int i; + + /* Avoid infinite loop if any insn of the result matches + the original pattern. */ + for (i = 0; i < XVECLEN (seq, 0); i++) + if (GET_CODE (XVECEXP (seq, 0, i)) == INSN + && rtx_equal_p (PATTERN (XVECEXP (seq, 0, i)), pat)) + return trial; + /* If we are splitting a JUMP_INSN, look for the JUMP_INSN in SEQ and copy our JUMP_LABEL to it. If JUMP_LABEL is non-zero, increment the usage count so we don't delete the label. */ - int i; if (GET_CODE (trial) == JUMP_INSN) for (i = XVECLEN (seq, 0) - 1; i >= 0; i--) |