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Fix $readmem[hb] for mem2reg memories, fixes #785 

Signed-off-by: Clifford Wolf <clifford@clifford.at>
This commit is contained in:
Clifford Wolf 2019-03-02 09:58:20 -08:00
parent f2f5ecd834
commit 5d93dcce86
1 changed files with 35 additions and 0 deletions
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35
frontends/ast/simplify.cc
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@ -2172,6 +2172,8 @@ skip_dynamic_range_lvalue_expansion:;
}
newNode = readmem(str == "\\$readmemh", node_filename->bitsAsConst().decode_string(), node_memory->id2ast, start_addr, finish_addr, unconditional_init);
delete node_filename;
delete node_memory;
goto apply_newNode;
}
@ -3059,6 +3061,39 @@ bool AstNode::mem2reg_as_needed_pass2(pool<AstNode*> &mem2reg_set, AstNode *mod,
if (type == AST_FUNCTION || type == AST_TASK)
return false;
if (type == AST_MEMINIT && id2ast && mem2reg_set.count(id2ast))
{
log_assert(children[0]->type == AST_CONSTANT);
log_assert(children[1]->type == AST_CONSTANT);
log_assert(children[2]->type == AST_CONSTANT);
int cursor = children[0]->asInt(false);
Const data = children[1]->bitsAsConst();
int length = children[2]->asInt(false);
if (length != 0)
{
AstNode *block = new AstNode(AST_INITIAL, new AstNode(AST_BLOCK));
mod->children.push_back(block);
block = block->children[0];
int wordsz = GetSize(data) / length;
for (int i = 0; i < length; i++) {
block->children.push_back(new AstNode(AST_ASSIGN_EQ, new AstNode(AST_IDENTIFIER, new AstNode(AST_RANGE, AstNode::mkconst_int(cursor+i, false))), mkconst_bits(data.extract(i*wordsz, wordsz).bits, false)));
block->children.back()->children[0]->str = str;
block->children.back()->children[0]->id2ast = id2ast;
block->children.back()->children[0]->was_checked = true;
}
}
AstNode *newNode = new AstNode(AST_NONE);
newNode->cloneInto(this);
delete newNode;
did_something = true;
}
if (type == AST_ASSIGN && block == NULL && children[0]->mem2reg_check(mem2reg_set))
{
if (async_block == NULL) {