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Commit 7258e30c by Corentin Wallez
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TOutputGLSLBase::visitLoop clarify the function slightly

Since only for loops can be unrolled, handle each type of loop only once. This improvement was going to be part of a do-while workaround for Mac that will instead be done at the AST level. BUG=angleproject:891 Change-Id: Ic8ecf41aa6d9abd7a01c2230e908c85152f52b62 Reviewed-on: https://chromium-review.googlesource.com/302332 Tryjob-Request: Corentin Wallez <cwallez@chromium.org> Reviewed-by: 's avatarJamie Madill <jmadill@chromium.org> Reviewed-by: 's avatarGeoff Lang <geofflang@chromium.org> Tested-by: 's avatarCorentin Wallez <cwallez@chromium.org>
parent 947908f1
Showing with 20 additions and 21 deletions
src/compiler/translator/OutputGLSLBase.cpp
......@@ -1075,8 +1075,12 @@ bool TOutputGLSLBase::visitLoop(Visit visit, TIntermLoop *node)
TInfoSinkBase &out = objSink();
incrementDepth(node);
// Loop header.
TLoopType loopType = node->getType();
// Only for loops can be unrolled
ASSERT(!node->getUnrollFlag() || loopType == ELoopFor);
if (loopType == ELoopFor) // for loop
{
if (!node->getUnrollFlag())
......@@ -1093,6 +1097,8 @@ bool TOutputGLSLBase::visitLoop(Visit visit, TIntermLoop *node)
if (node->getExpression())
node->getExpression()->traverse(this);
out << ")\n";
visitCodeBlock(node->getBody());
}
else
{
......@@ -1105,6 +1111,16 @@ bool TOutputGLSLBase::visitLoop(Visit visit, TIntermLoop *node)
out << "for (int " << name << " = 0; "
<< name << " < 1; "
<< "++" << name << ")\n";
out << "{\n";
mLoopUnrollStack.push(node);
while (mLoopUnrollStack.satisfiesLoopCondition())
{
visitCodeBlock(node->getBody());
mLoopUnrollStack.step();
}
mLoopUnrollStack.pop();
out << "}\n";
}
}
else if (loopType == ELoopWhile) // while loop
......@@ -1113,39 +1129,22 @@ bool TOutputGLSLBase::visitLoop(Visit visit, TIntermLoop *node)
ASSERT(node->getCondition() != NULL);
node->getCondition()->traverse(this);
out << ")\n";
visitCodeBlock(node->getBody());
}
else // do-while loop
{
ASSERT(loopType == ELoopDoWhile);
out << "do\n";
}
// Loop body.
if (node->getUnrollFlag())
{
out << "{\n";
mLoopUnrollStack.push(node);
while (mLoopUnrollStack.satisfiesLoopCondition())
{
visitCodeBlock(node->getBody());
mLoopUnrollStack.step();
}
mLoopUnrollStack.pop();
out << "}\n";
}
else
{
visitCodeBlock(node->getBody());
}
// Loop footer.
if (loopType == ELoopDoWhile) // do-while loop
{
out << "while (";
ASSERT(node->getCondition() != NULL);
node->getCondition()->traverse(this);
out << ");\n";
}
decrementDepth();
// No need to visit children. They have been already processed in
......
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