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| author | Eric Botcazou <ebotcazou@libertysurf.fr> | 2003-07-21 18:52:38 +0200 |
|---|---|---|
| committer | Mark Mitchell <mmitchel@gcc.gnu.org> | 2003-07-21 16:52:38 +0000 |
| commit | bbda30a4aae700f963fd164edbeac4f4688bf2a0 (patch) | |
| tree | 012a183ac137fb8f46d0f240aabffa82cb691b8e /gcc/unroll.c | |
| parent | 9ef2dd1fad3a6e04366c236a29d4377812e4bccd (diff) | |
| download | gcc-bbda30a4aae700f963fd164edbeac4f4688bf2a0.zip gcc-bbda30a4aae700f963fd164edbeac4f4688bf2a0.tar.gz gcc-bbda30a4aae700f963fd164edbeac4f4688bf2a0.tar.bz2 | |
re PR rtl-optimization/11536 ([strength-reduce] -O2 optimalization produces wrong code)
PR optimization/11536
* unroll.c (loop_iterations): Do not replace a register holding
the final value by its equivalent before the loop if it is not
invariant.
PR optimization/11536
* gcc.dg/20030721-1.c: New test.
From-SVN: r69635
Diffstat (limited to 'gcc/unroll.c')
| -rw-r--r-- | gcc/unroll.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/gcc/unroll.c b/gcc/unroll.c index 62b8152..1c66b13 100644 --- a/gcc/unroll.c +++ b/gcc/unroll.c @@ -3618,7 +3618,7 @@ loop_iterations (struct loop *loop) if (find_common_reg_term (temp, reg2)) initial_value = temp; - else + else if (loop_invariant_p (loop, reg2)) { /* Find what reg2 is equivalent to. Hopefully it will either be reg1 or reg1 plus a constant. Let's ignore |