diff options
| author | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-06-15 01:10:49 +0000 |
|---|---|---|
| committer | rth <rth@138bc75d-0d04-0410-961f-82ee72b054a4> | 2002-06-15 01:10:49 +0000 |
| commit | a22e3dfa0b89b630518417da71e5060580f7c6cd (patch) | |
| tree | 32973a77f9b92a29a421bc6e7eefe35737b606cc /gcc/unroll.c | |
| parent | fa81344030faf9d4f501a535dac42d6fdb58000a (diff) | |
| download | gcc-a22e3dfa0b89b630518417da71e5060580f7c6cd.tar.gz | |
* loop.c (check_final_value): Use v->always_executed
instead of v->always_computable.
* unroll.c (final_giv_value): Don't calculate the final
value as a function of the biv if the giv is not computed
for every loop iteration.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@54634 138bc75d-0d04-0410-961f-82ee72b054a4
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 6 |
1 files changed, 4 insertions, 2 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 3b81d223ac7..a795dcbc202 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -3249,7 +3249,8 @@ final_giv_value (loop, v) /* Try to calculate the final value as a function of the biv it depends upon. The only exit from the loop must be the fall through at the bottom - (otherwise it may not have its final value when the loop exits). */ + and the insn that sets the giv must be executed on every iteration + (otherwise the giv may not have its final value when the loop exits). */ /* ??? Can calculate the final giv value by subtracting off the extra biv increments times the giv's mult_val. The loop must have @@ -3257,7 +3258,8 @@ final_giv_value (loop, v) to be known. */ if (n_iterations != 0 - && ! loop->exit_count) + && ! loop->exit_count + && v->always_executed) { /* ?? It is tempting to use the biv's value here since these insns will be put after the loop, and hence the biv will have its final value |