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[ast] laying down the ground work for on-the-fly phi-node simplification

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This commit is contained in:
Philippe Tillet
2019-01-06 15:16:02 -05:00
parent 6bfceae4a6
commit 179890c7ad
8 changed files with 60 additions and 14 deletions
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11
lib/ir/instructions.cpp
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@@ -26,7 +26,9 @@ instruction::instruction(type *ty, unsigned num_ops, const std::string &name, in
//===----------------------------------------------------------------------===//
phi_node::phi_node(type *ty, unsigned num_reserved, std::string const &name, instruction *next)
: instruction(ty, num_reserved, name, next), blocks_(num_reserved){ }
: instruction(ty, 0, name, next) {
blocks_.reserve(num_reserved);
}
// Set incoming value
void phi_node::set_incoming_value(unsigned i, value *v){
@@ -44,11 +46,8 @@ void phi_node::set_incoming_block(unsigned i, basic_block *block){
// Add incoming
void phi_node::add_incoming(value *v, basic_block *block){
if(get_num_operands()==num_reserved_){
num_reserved_++;
resize_ops(num_reserved_);
blocks_.resize(num_reserved_);
}
resize_ops(get_num_operands() + 1);
blocks_.resize(get_num_operands() + 1);
set_incoming_value(get_num_operands() - 1, v);
set_incoming_block(get_num_operands() - 1, block);
}