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Remove unreachable basic blocks before "linking"

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This commit is contained in:
Paweł Bylica 2014-10-21 16:06:30 +02:00
parent a6ce4ba7c5
commit d95083ade4
1 changed files with 19 additions and 0 deletions
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19
libevmjit/Compiler.cpp
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@ -875,6 +875,25 @@ void Compiler::compileBasicBlock(BasicBlock& basicBlock, bytesConstRef bytecode,
void Compiler::linkBasicBlocks(Stack& stack)
{
// Remove dead basic blocks
auto sthErased = false;
do
{
sthErased = false;
for (auto it = basicBlocks.begin(); it != basicBlocks.end();)
{
auto llvmBB = it->second.llvm();
if (llvm::pred_begin(llvmBB) == llvm::pred_end(llvmBB))
{
llvmBB->eraseFromParent();
basicBlocks.erase(it++);
sthErased = true;
}
else
++it;
}
} while (sthErased);
struct BBInfo
{
BasicBlock& bblock;