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Fast-compiler: Added trivial implementations of while and do/while.

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Review URL: http://codereview.chromium.org/372055


git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@3250 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
This commit is contained in:
lrn@chromium.org 2009-11-09 13:22:38 +00:00
parent 9065114928
commit 5b1faade55
2 changed files with 53 additions and 4 deletions
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12
src/compiler.cc
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@ -708,12 +708,20 @@ void CodeGenSelector::VisitSwitchStatement(SwitchStatement* stmt) {
void CodeGenSelector::VisitDoWhileStatement(DoWhileStatement* stmt) { void CodeGenSelector::VisitDoWhileStatement(DoWhileStatement* stmt) {
BAILOUT("DoWhileStatement"); // We do not handle loops with breaks or continue statements in their
// body. We will bailout when we hit those statements in the body.
ProcessExpression(stmt->cond(), Expression::kTest);
CHECK_BAILOUT;
Visit(stmt->body());
} }
void CodeGenSelector::VisitWhileStatement(WhileStatement* stmt) { void CodeGenSelector::VisitWhileStatement(WhileStatement* stmt) {
BAILOUT("WhileStatement"); // We do not handle loops with breaks or continue statements in their
// body. We will bailout when we hit those statements in the body.
ProcessExpression(stmt->cond(), Expression::kTest);
CHECK_BAILOUT;
Visit(stmt->body());
} }

45
src/fast-codegen.cc
View File

@ -304,12 +304,53 @@ void FastCodeGenerator::VisitSwitchStatement(SwitchStatement* stmt) {
void FastCodeGenerator::VisitDoWhileStatement(DoWhileStatement* stmt) { void FastCodeGenerator::VisitDoWhileStatement(DoWhileStatement* stmt) {
UNREACHABLE(); Comment cmnt(masm_, "[ DoWhileStatement");
increment_loop_depth();
Label body, exit;
// Emit the test at the bottom of the loop.
__ bind(&body);
Visit(stmt->body());
// We are not in an expression context because we have been compiling
// statements. Set up a test expression context for the condition.
ASSERT_EQ(NULL, true_label_);
ASSERT_EQ(NULL, false_label_);
true_label_ = &body;
false_label_ = &exit;
ASSERT(stmt->cond()->context() == Expression::kTest);
Visit(stmt->cond());
__ bind(&exit);
decrement_loop_depth();
} }
void FastCodeGenerator::VisitWhileStatement(WhileStatement* stmt) { void FastCodeGenerator::VisitWhileStatement(WhileStatement* stmt) {
UNREACHABLE(); Comment cmnt(masm_, "[ WhileStatement");
increment_loop_depth();
Label test, body, exit;
// Emit the test at the bottom of the loop.
__ jmp(&test);
__ bind(&body);
Visit(stmt->body());
__ bind(&test);
// We are not in an expression context because we have been compiling
// statements. Set up a test expression context for the condition.
ASSERT_EQ(NULL, true_label_);
ASSERT_EQ(NULL, false_label_);
true_label_ = &body;
false_label_ = &exit;
ASSERT(stmt->cond()->context() == Expression::kTest);
Visit(stmt->cond());
__ bind(&exit);
decrement_loop_depth();
} }