Bommels05/Mozilla
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Began moving away from variables, fixed compare/branch ordering.

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Testcases working.


git-svn-id: svn://10.0.0.236/trunk@66389 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
rogerl%netscape.com
2000-04-19 02:09:06 +00:00
parent ab02f6ff88
commit f2e47face0
10 changed files with 116 additions and 134 deletions
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80
mozilla/js2/tests/cpp/js2_shell.cpp
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@@ -51,6 +51,7 @@ static void initConsole(StringPtr consoleName,
argc = 1;
argv = mac_argv;
}
#endif
namespace JavaScript {
@@ -287,43 +288,41 @@ namespace JavaScript {
uint32 pos = 0;
ICodeGenerator icg;
// var i,j; i = j + 2;
// var i,j;
// i is bound to var #0, j to var #1
Register r_i = icg.allocateVariable(world.identifiers[widenCString("i")]);
Register r_j = icg.allocateVariable(world.identifiers[widenCString("j")]);
// i = j + 2;
icg.beginStatement(pos);
Register r1 = icg.loadVariable(1);
Register r2 = icg.loadImmediate(2.0);
icg.saveVariable(0, icg.op(ADD, r1, r2));
Register r1 = icg.loadImmediate(2.0);
icg.move(r_i, icg.op(ADD, r_i, r_j));
// j = a.b
icg.beginStatement(pos);
Register r4 = icg.loadName(world.identifiers[widenCString("a")]);
Register r5 = icg.getProperty(r4, world.identifiers[widenCString("b")]);
icg.saveVariable(1, r5);
r1 = icg.loadName(world.identifiers[widenCString("a")]);
r1 = icg.getProperty(r1, world.identifiers[widenCString("b")]);
icg.move(r_j, r1);
// while (i) i = i + j;
icg.beginWhileStatement(pos);
r1 = icg.loadVariable(0);
icg.endWhileExpression(r1);
icg.saveVariable(0, icg.op(ADD, icg.loadVariable(0), icg.loadVariable(1)));
icg.endWhileExpression(r_i);
icg.move(r_i, icg.op(ADD, r_i, r_j));
icg.endWhileStatement();
// if (i) if (j) i = 3; else j = 4;
r1 = icg.loadVariable(0);
icg.beginIfStatement(pos, r1);
r2 = icg.loadVariable(1);
icg.beginIfStatement(pos, r2);
icg.saveVariable(0, icg.loadImmediate(3));
icg.beginIfStatement(pos, r_i);
icg.beginIfStatement(pos, r_j);
icg.move(r_i, icg.loadImmediate(3));
icg.beginElseStatement(true);
icg.saveVariable(1, icg.loadImmediate(4));
icg.move(r_j, icg.loadImmediate(4));
icg.endIfStatement();
icg.beginElseStatement(false);
icg.endIfStatement();
// switch (i) { case 3: case 4: j = 4; break; case 5: j = 5; break; default : j = 6; }
r1 = icg.loadVariable(0);
icg.beginSwitchStatement(pos, r1);
icg.beginSwitchStatement(pos, r_i);
// case 3, note empty case statement (?necessary???)
icg.endCaseCondition(icg.loadImmediate(3));
icg.beginCaseStatement();
@@ -332,30 +331,29 @@ namespace JavaScript {
icg.endCaseCondition(icg.loadImmediate(4));
icg.beginCaseStatement();
icg.beginStatement(pos);
icg.saveVariable(1, icg.loadImmediate(4));
icg.move(r_j, icg.loadImmediate(4));
icg.breakStatement();
icg.endCaseStatement();
// case 5
icg.endCaseCondition(icg.loadImmediate(5));
icg.beginCaseStatement();
icg.beginStatement(pos);
icg.saveVariable(1, icg.loadImmediate(5));
icg.move(r_j, icg.loadImmediate(5));
icg.breakStatement();
icg.endCaseStatement();
// default
icg.beginDefaultStatement();
icg.beginStatement(pos);
icg.saveVariable(1, icg.loadImmediate(6));
icg.move(r_j, icg.loadImmediate(6));
icg.endDefaultStatement();
icg.endSwitchStatement();
// for ( ; i; i + 1 ) j = 99;
// for ( ; i; i = i + 1 ) j = 99;
icg.beginForStatement(pos);
r1 = icg.loadVariable(0);
icg.forCondition(r1);
icg.saveVariable(0, icg.op(ADD, icg.loadVariable(0), icg.loadImmediate(1)));
icg.forCondition(r_i);
icg.move(r_i, icg.op(ADD, r_i, icg.loadImmediate(1)));
icg.forIncrement();
icg.saveVariable(0, icg.loadImmediate(99));
icg.move(r_j, icg.loadImmediate(99));
icg.endForStatement();
ICodeModule *icm = icg.complete();
@@ -374,11 +372,12 @@ namespace JavaScript {
ICodeGenerator fun;
// function sum(n) { if (n > 1) return 1 + sum(n - 1); else return 1; }
// n is bound to var #0.
Register r_n = fun.allocateVariable(world.identifiers[widenCString("n")]);
fun.beginStatement(position);
Register r1 = fun.op(COMPARE_GT, fun.loadVariable(0), fun.loadImmediate(1.0));
Register r1 = fun.op(COMPARE_GT, r_n, fun.loadImmediate(1.0));
fun.beginIfStatement(position, r1);
fun.beginStatement(position);
r1 = fun.op(SUBTRACT, fun.loadVariable(0), fun.loadImmediate(1.0));
r1 = fun.op(SUBTRACT, r_n, fun.loadImmediate(1.0));
RegisterList args(1);
args[0] = r1;
r1 = fun.call(fun.loadName(sum), args);
@@ -419,11 +418,12 @@ namespace JavaScript {
ICodeGenerator icg;
// fact(n) {
// n is bound to var #0.
// var result = 1;
// result is bound to var #1.
Register r_n = icg.allocateVariable(world.identifiers[widenCString("n")]);
Register r_result = icg.allocateVariable(world.identifiers[widenCString("result")]);
icg.beginStatement(position);
icg.saveVariable(1, icg.loadImmediate(1.0));
icg.move(r_result, icg.loadImmediate(1.0));
// while (n > 1) {
// result = result * n;
@@ -431,24 +431,20 @@ namespace JavaScript {
// }
{
icg.beginWhileStatement(position);
Register r0 = icg.loadVariable(0);
Register r1 = icg.loadImmediate(1.0);
Register r2 = icg.op(COMPARE_GT, r0, r1);
Register r2 = icg.op(COMPARE_GT, r_n, r1);
icg.endWhileExpression(r2);
r0 = icg.loadVariable(0);
r1 = icg.loadVariable(1);
r2 = icg.op(MULTIPLY, r1, r0);
icg.saveVariable(1, r2);
r2 = icg.op(MULTIPLY, r_result, r_n);
icg.move(r_result, r2);
icg.beginStatement(position);
r0 = icg.loadVariable(0);
r1 = icg.loadImmediate(1.0);
r2 = icg.op(SUBTRACT, r0, r1);
icg.saveVariable(0, r2);
r2 = icg.op(SUBTRACT, r_n, r1);
icg.move(r_n, r2);
icg.endWhileStatement();
}
// return result;
icg.returnStatement(icg.loadVariable(1));
icg.returnStatement(r_result);
ICodeModule *icm = icg.complete();
stdOut << icg;