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| author | cpopetz <cpopetz@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-04-14 00:41:31 +0000 |
|---|---|---|
| committer | cpopetz <cpopetz@138bc75d-0d04-0410-961f-82ee72b054a4> | 2000-04-14 00:41:31 +0000 |
| commit | 5262c25318f66b459190a127369c64fe9da348c1 (patch) | |
| tree | a51aa7adf842d0029fca90fbf81d83bd646c81b0 | |
| parent | 16e8b82c58f0c8f6ec13902666167f3b9e881c8e (diff) | |
| download | ppe42-gcc-5262c25318f66b459190a127369c64fe9da348c1.tar.gz ppe42-gcc-5262c25318f66b459190a127369c64fe9da348c1.zip | |
* emit-rtl.c (try_split): Avoid infinite loop if the split
results in a sequence that contains the original insn.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@33143 138bc75d-0d04-0410-961f-82ee72b054a4
| -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 0b3925f11d8..a35633392e1 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 e697d55c455..8fd559ca928 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--) |
