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Fix hierarchical --prof-pgo (#6213)

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This commit is contained in:
Bartłomiej Chmiel
2025-09-13 10:19:00 -04:00
committed by GitHub
parent 907047d823
commit be813e96dd
11 changed files with 110 additions and 86 deletions
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src/V3ProtectLib.cpp
+5 -14
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@@ -24,8 +24,6 @@
#include "V3String.h"
#include "V3Task.h"
#include <list>
VL_DEFINE_DEBUG_FUNCTIONS;
//######################################################################
@@ -104,21 +102,14 @@ class ProtectVisitor final : public VNVisitor {
txtp->addText(fl, "\n`ifdef VERILATOR\n");
txtp->addText(fl, "`verilator_config\n");
// The `eval` function is called inside both update functions. As those functions
// are created by text bashing, we need to find cost of `_eval` which is the first function
// with a real cost in AST.
uint32_t cost = 0;
modp->foreach([&cost](AstCFunc* cfuncp) {
if (cfuncp->name() == "_eval") cost = V3InstrCount::count(cfuncp, false);
});
txtp->addText(fl, "profile_data -hier-dpi \"" + m_libName
+ "_protectlib_combo_update\" -cost 64'd" + std::to_string(cost)
+ "\n");
+ "_protectlib_combo_update\" -cost 64'd"
+ std::to_string(v3Global.currentHierBlockCost()) + "\n");
txtp->addText(fl, "profile_data -hier-dpi \"" + m_libName
+ "_protectlib_seq_update\" -cost 64'd" + std::to_string(cost)
+ "\n");
+ "_protectlib_seq_update\" -cost 64'd"
+ std::to_string(v3Global.currentHierBlockCost()) + "\n");
// Mark remaining NDA protectlib wrapper DPIs as non-hazardous by deliberately forwarding
// Mark remaining NBA protectlib wrapper DPIs as non-hazardous by deliberately forwarding
// them with non-zero cost.
// Also, specify hierarchical workers for those tasks for scheduling.
txtp->addText(fl, "profile_data -hier-dpi \"" + m_libName