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7153771: array bound check elimination for c1

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When possible optimize out array bound checks, inserting predicates when needed.

Reviewed-by: never, kvn, twisti
This commit is contained in:
Thomas Wuerthinger 2013-03-21 09:27:54 +01:00 • committed by Roland Westrelin
parent 2f4ecb86a2
commit 06ef4cddf7
40 changed files with 2861 additions and 153 deletions
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8
hotspot/src/share/vm/oops/methodData.cpp
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@ -392,6 +392,9 @@ MethodData* MethodData::allocate(ClassLoaderData* loader_data, methodHandle meth
}
int MethodData::bytecode_cell_count(Bytecodes::Code code) {
#if defined(COMPILER1) && !defined(COMPILER2)
return no_profile_data;
#else
switch (code) {
case Bytecodes::_checkcast:
case Bytecodes::_instanceof:
@ -438,6 +441,7 @@ int MethodData::bytecode_cell_count(Bytecodes::Code code) {
return variable_cell_count;
}
return no_profile_data;
#endif
}
// Compute the size of the profiling information corresponding to
@ -509,6 +513,9 @@ int MethodData::compute_allocation_size_in_words(methodHandle method) {
// the segment in bytes.
int MethodData::initialize_data(BytecodeStream* stream,
int data_index) {
#if defined(COMPILER1) && !defined(COMPILER2)
return 0;
#else
int cell_count = -1;
int tag = DataLayout::no_tag;
DataLayout* data_layout = data_layout_at(data_index);
@ -587,6 +594,7 @@ int MethodData::initialize_data(BytecodeStream* stream,
assert(!bytecode_has_profile(c), "agree w/ !BHP");
return 0;
}
#endif
}
// Get the data at an arbitrary (sort of) data index.