luke/verilator
1
0
Fork 0
mirror of https://github.com/verilator/verilator.git synced 2026-10-06 10:03:44 +02:00
Code Issues Packages Projects Releases Wiki Activity

Avoid repeated traversal for SC text sections in emit when not needed

Browse Source 
Repeatedly traversing whole modules in emit (due to file splitting)
looking for `systemc_* sections can add up to a lot of time on large
designs that have been flattened and need to be split into many files.
Assuming `systemc_* is a rarely used feature, just don't bother if we
don't need to. This gain 9% verilation speed improvement on a large
benchmark.
This commit is contained in:
Geza Lore
2022-01-07 12:05:50 +00:00
parent 41a563bdc8
commit 9a8c878f2d
3 changed files with 13 additions and 6 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/V3EmitCBase.cpp
+4
View File
@@ -235,6 +235,10 @@ void EmitCBaseVisitor::emitModCUse(const AstNodeModule* modp, VUseType useType)
}
void EmitCBaseVisitor::emitTextSection(const AstNodeModule* modp, VNType type) {
// Short circuit if nothing to do. This can save a lot of time on large designs as this
// function needs to traverse the entire module linearly.
if (!v3Global.hasSCTextSections()) return;
int last_line = -999;
for (AstNode* nodep = modp->stmtsp(); nodep; nodep = nodep->nextp()) {
if (const AstNodeText* const textp = VN_CAST(nodep, NodeText)) {