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6805427: adlc compiler may generate incorrect machnode emission code

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Reviewed-by: kvn, twisti
This commit is contained in:
Tom Rodriguez 2009-02-25 10:53:14 -08:00
parent decdeea77d
commit a82243d887
2 changed files with 18 additions and 10 deletions
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19
hotspot/src/share/vm/adlc/formssel.cpp
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@ -1217,13 +1217,17 @@ void InstructForm::rep_var_format(FILE *fp, const char *rep_var) {
// Seach through operands to determine parameters unique positions.
void InstructForm::set_unique_opnds() {
uint* uniq_idx = NULL;
uint nopnds = num_opnds();
int nopnds = num_opnds();
uint num_uniq = nopnds;
uint i;
int i;
_uniq_idx_length = 0;
if ( nopnds > 0 ) {
// Allocate index array with reserve.
uniq_idx = (uint*) malloc(sizeof(uint)*(nopnds + 2));
for( i = 0; i < nopnds+2; i++ ) {
// Allocate index array. Worst case we're mapping from each
// component back to an index and any DEF always goes at 0 so the
// length of the array has to be the number of components + 1.
_uniq_idx_length = _components.count() + 1;
uniq_idx = (uint*) malloc(sizeof(uint)*(_uniq_idx_length));
for( i = 0; i < _uniq_idx_length; i++ ) {
uniq_idx[i] = i;
}
}
@ -1238,8 +1242,8 @@ void InstructForm::set_unique_opnds() {
_parameters.reset();
while( (name = _parameters.iter()) != NULL ) {
count = 0;
uint position = 0;
uint uniq_position = 0;
int position = 0;
int uniq_position = 0;
_components.reset();
Component *comp = NULL;
if( sets_result() ) {
@ -1255,6 +1259,7 @@ void InstructForm::set_unique_opnds() {
}
if( strcmp(name, comp->_name)==0 ) {
if( ++count > 1 ) {
assert(position < _uniq_idx_length, "out of bounds");
uniq_idx[position] = uniq_position;
has_dupl_use = true;
} else {

9
hotspot/src/share/vm/adlc/formssel.hpp
View File

@ -101,6 +101,7 @@ public:
const char *_ins_pipe; // Instruction Scheduline description class
uint *_uniq_idx; // Indexes of unique operands
int _uniq_idx_length; // Length of _uniq_idx array
uint _num_uniq; // Number of unique operands
ComponentList _components; // List of Components matches MachNode's
// operand structure
@ -257,11 +258,13 @@ public:
void set_unique_opnds();
uint num_unique_opnds() { return _num_uniq; }
uint unique_opnds_idx(int idx) {
if( _uniq_idx != NULL && idx > 0 )
if( _uniq_idx != NULL && idx > 0 ) {
assert(idx < _uniq_idx_length, "out of bounds");
return _uniq_idx[idx];
else
} else {
return idx;
}
}
}
// Operands which are only KILLs aren't part of the input array and
// require special handling in some cases. Their position in this