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8040921: Uninitialised memory in hotspot/src/share/vm/c1/c1_LinearScan.cpp

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Fixed parfait initialization issue.

Reviewed-by: kvn, twisti
This commit is contained in:
Morris Meyer 2014-08-05 08:19:03 -07:00
parent 70a55eac34
commit 97512f58ec
1 changed files with 10 additions and 13 deletions
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23
hotspot/src/share/vm/c1/c1_LinearScan.cpp
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@ -1613,25 +1613,22 @@ void LinearScan::allocate_registers() {
Interval* precolored_cpu_intervals, *not_precolored_cpu_intervals;
Interval* precolored_fpu_intervals, *not_precolored_fpu_intervals;
create_unhandled_lists(&precolored_cpu_intervals, &not_precolored_cpu_intervals, is_precolored_cpu_interval, is_virtual_cpu_interval);
if (has_fpu_registers()) {
create_unhandled_lists(&precolored_fpu_intervals, &not_precolored_fpu_intervals, is_precolored_fpu_interval, is_virtual_fpu_interval);
#ifdef ASSERT
} else {
// fpu register allocation is omitted because no virtual fpu registers are present
// just check this again...
create_unhandled_lists(&precolored_fpu_intervals, &not_precolored_fpu_intervals, is_precolored_fpu_interval, is_virtual_fpu_interval);
assert(not_precolored_fpu_intervals == Interval::end(), "missed an uncolored fpu interval");
#endif
}
// allocate cpu registers
create_unhandled_lists(&precolored_cpu_intervals, &not_precolored_cpu_intervals,
is_precolored_cpu_interval, is_virtual_cpu_interval);
// allocate fpu registers
create_unhandled_lists(&precolored_fpu_intervals, &not_precolored_fpu_intervals,
is_precolored_fpu_interval, is_virtual_fpu_interval);
// the fpu interval allocation cannot be moved down below with the fpu section as
// the cpu_lsw.walk() changes interval positions.
LinearScanWalker cpu_lsw(this, precolored_cpu_intervals, not_precolored_cpu_intervals);
cpu_lsw.walk();
cpu_lsw.finish_allocation();
if (has_fpu_registers()) {
// allocate fpu registers
LinearScanWalker fpu_lsw(this, precolored_fpu_intervals, not_precolored_fpu_intervals);
fpu_lsw.walk();
fpu_lsw.finish_allocation();