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Heavier optimisations (and a couple of debugging warnings) 

git-svn-id: https://svn.code.sf.net/p/fteqw/code/trunk@381 fc73d0e0-1445-4013-8a0c-d673dee63da5
This commit is contained in:
Spoike 2004-10-28 07:03:56 +00:00
parent 9dfffde72b
commit d5ce9a1c68
1 changed files with 113 additions and 29 deletions
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142
engine/qclib/qcc_pr_comp.c
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@ -674,6 +674,7 @@ pbool QCC_OPCodeValid(QCC_opcode_t *op)
}
QCC_def_t *QCC_PR_Expression (int priority);
int QCC_AStatementJumpsTo(int targ, int first, int last);
QCC_def_t junkdef;
@ -4231,7 +4232,12 @@ void QCC_PR_ParseStatement (void)
junkdef.type = type_float;
QCC_FreeTemp(QCC_PR_Statement (&pr_opcodes[OP_GOTO], &junkdef, 0, (QCC_dstatement_t **)0xffffffff));
if (patch1)
patch1->b = &statements[numstatements] - patch1;
{
if (patch1->op == OP_GOTO)
patch1->a = &statements[numstatements] - patch1;
else
patch1->b = &statements[numstatements] - patch1;
}
if (breaks != num_breaks)
{
@ -4258,8 +4264,8 @@ void QCC_PR_ParseStatement (void)
int old_numstatements;
int numtemp, i;
QCC_dstatement_t temp[32];
int linenum[32];
QCC_dstatement_t temp[sizeof(linenum)/sizeof(linenum[0])];
continues = num_continues;
breaks = num_breaks;
@ -4272,26 +4278,39 @@ void QCC_PR_ParseStatement (void)
}
patch2 = &statements[numstatements];
conditional = true;
e = QCC_PR_Expression(TOP_PRIORITY);
conditional = false;
QCC_PR_Expect(";");
old_numstatements = numstatements;
QCC_FreeTemp(QCC_PR_Expression(TOP_PRIORITY));
numtemp = numstatements - old_numstatements;
if (numtemp > 32)
QCC_PR_ParseError(ERR_TOOCOMPLEX, "Update expression too large");
numstatements = old_numstatements;
for (i = 0 ; i < numtemp ; i++)
if (!QCC_PR_Check(";"))
{
linenum[i] = statement_linenums[numstatements + i];
temp[i] = statements[numstatements + i];
conditional = true;
e = QCC_PR_Expression(TOP_PRIORITY);
conditional = false;
QCC_PR_Expect(";");
}
else
e = NULL;
QCC_PR_Expect(")");
QCC_FreeTemp(QCC_PR_Statement(&pr_opcodes[OP_IFNOT], e, 0, NULL));
patch1 = &statements[numstatements-1];
if (!QCC_PR_Check(")"))
{
old_numstatements = numstatements;
QCC_FreeTemp(QCC_PR_Expression(TOP_PRIORITY));
numtemp = numstatements - old_numstatements;
if (numtemp > sizeof(linenum)/sizeof(linenum[0]))
QCC_PR_ParseError(ERR_TOOCOMPLEX, "Update expression too large");
numstatements = old_numstatements;
for (i = 0 ; i < numtemp ; i++)
{
linenum[i] = statement_linenums[numstatements + i];
temp[i] = statements[numstatements + i];
}
QCC_PR_Expect(")");
}
else
numtemp = 0;
if (e)
QCC_FreeTemp(QCC_PR_Statement(&pr_opcodes[OP_IFNOT], e, 0, &patch1));
else
patch1 = NULL;
QCC_PR_ParseStatement();
patch3 = &statements[numstatements];
for (i = 0 ; i < numtemp ; i++)
@ -4300,7 +4319,8 @@ void QCC_PR_ParseStatement (void)
statements[numstatements++] = temp[i];
}
QCC_PR_SimpleStatement(OP_GOTO, patch2 - &statements[numstatements], 0, 0);
patch1->b = &statements[numstatements] - patch1;
if (patch1)
patch1->b = &statements[numstatements] - patch1;
if (breaks != num_breaks)
{
@ -4429,17 +4449,20 @@ void QCC_PR_ParseStatement (void)
}
QCC_PR_Expect (")"); //close bracket is after we save the statement to mem (so debugger does not show the if statement as being on the line after
QCC_PR_ParseStatement ();
if (QCC_PR_Check ("else"))
{
int lastwasreturn;
lastwasreturn = 0;//statements[numstatements-1].op == OP_RETURN || statements[numstatements-1].op == OP_DONE;
lastwasreturn = statements[numstatements-1].op == OP_RETURN || statements[numstatements-1].op == OP_DONE;
if (lastwasreturn && opt_compound_jumps)
//nothing jumped to it, so it's not a problem!
if (lastwasreturn && opt_compound_jumps && !QCC_AStatementJumpsTo(numstatements, patch1-statements, numstatements))
{
// QCC_PR_ParseWarning(0, "optimised the else");
optres_compound_jumps++;
patch1->b = &statements[numstatements] - patch1;
QCC_PR_ParseStatement ();
}
else
@ -5188,6 +5211,7 @@ void QCC_CompoundJumps(int first, int last)
//jumps to jumps are reordered so they become jumps to the final target.
int statement;
int st;
int infloop;
for (st = first; st < last; st++)
{
if (pr_opcodes[statements[st].op].type_a == NULL)
@ -5201,8 +5225,14 @@ void QCC_CompoundJumps(int first, int last)
statements[st].c = statements[statement].c;
optres_compound_jumps++;
}
infloop = 1000;
while (statements[statement].op == OP_GOTO)
{
if (!infloop--)
{
QCC_PR_ParseWarning(0, "Infinate loop detected");
break;
}
statements[st].a = (statement+statements[statement].a - st);
statement = st + (signed)statements[st].a;
optres_compound_jumps++;
@ -5211,8 +5241,14 @@ void QCC_CompoundJumps(int first, int last)
if (pr_opcodes[statements[st].op].type_b == NULL)
{
statement = st + (signed)statements[st].b;
infloop = 1000;
while (statements[statement].op == OP_GOTO)
{
if (!infloop--)
{
QCC_PR_ParseWarning(0, "Infinate loop detected");
break;
}
statements[st].b = (statement+statements[statement].a - st);
statement = st + (signed)statements[st].b;
optres_compound_jumps++;
@ -5221,8 +5257,14 @@ void QCC_CompoundJumps(int first, int last)
if (pr_opcodes[statements[st].op].type_c == NULL)
{
statement = st + (signed)statements[st].c;
infloop = 1000;
while (statements[statement].op == OP_GOTO)
{
if (!infloop--)
{
QCC_PR_ParseWarning(0, "Infinate loop detected");
break;
}
statements[st].c = (statement+statements[statement].a - st);
statement = st + (signed)statements[st].c;
optres_compound_jumps++;
@ -5248,15 +5290,19 @@ void QCC_CheckForDeadAndMissingReturns(int first, int last, int rettype)
for (st = first; st < last; st++)
{
if (statements[st].op == OP_RETURN)
if (statements[st].op == OP_RETURN || statements[st].op == OP_GOTO)
{
st++;
if (st == last)
continue; //erm... end of function doesn't count as unreachable.
/*
if (statements[st].op == OP_GOTO) //inefficient compiler, we can ignore this.
continue;
if (statements[st].op == OP_DONE) //inefficient compiler, we can ignore this.
continue;
if (statements[st].op == OP_RETURN) //inefficient compiler, we can ignore this.
continue;
*/
//make sure something goes to just after this return.
for (st2 = first; st2 < last; st2++)
@ -5312,6 +5358,44 @@ void QCC_CheckForDeadAndMissingReturns(int first, int last, int rettype)
}
}
}
int QCC_AStatementJumpsTo(int targ, int first, int last)
{
int st;
for (st = first; st < last; st++)
{
if (pr_opcodes[statements[st].op].type_a == NULL)
{
if (st + (signed)statements[st].a == targ)
{
return true;
}
}
if (pr_opcodes[statements[st].op].type_b == NULL)
{
if (st + (signed)statements[st].b == targ)
{
return true;
}
}
if (pr_opcodes[statements[st].op].type_c == NULL)
{
if (st + (signed)statements[st].c == targ)
{
return true;
}
}
}
for (st = 0; st < num_labels; st++) //assume it's used.
{
if (pr_labels[st].statementno == targ)
return true;
}
return false;
}
/*
//goes through statements, if it sees a matching statement earlier, it'll strim out the current.
void QCC_CommonSubExpressionRemoval(int first, int last)
@ -5715,13 +5799,13 @@ QCC_function_t *QCC_PR_ParseImmediateStatements (QCC_type_t *type)
else
optres_return_only++;
QCC_CheckForDeadAndMissingReturns(f->code, numstatements, type->aux_type->type);
if (opt_compound_jumps)
QCC_CompoundJumps(f->code, numstatements);
// if (opt_comexprremoval)
// QCC_CommonSubExpressionRemoval(f->code, numstatements);
QCC_CheckForDeadAndMissingReturns(f->code, numstatements, type->aux_type->type);
QCC_RemapLockedTemps(f->code, numstatements);
locals_end = numpr_globals;