From 681c9654d7c49d407a999b2b03c980d66bcefd8f Mon Sep 17 00:00:00 2001
From: David Shah <davey1576@gmail.com>
Date: Sun, 17 Jun 2018 14:36:19 +0200
Subject: place_sa: Add a rip-up feature when initial placement fails

Signed-off-by: David Shah <davey1576@gmail.com>
---
 ice40/arch_place.cc | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

(limited to 'ice40/arch_place.cc')

diff --git a/ice40/arch_place.cc b/ice40/arch_place.cc
index 1c6361a1..276a9378 100644
--- a/ice40/arch_place.cc
+++ b/ice40/arch_place.cc
@@ -38,7 +38,8 @@ static bool logicCellsCompatible(const std::vector<const CellInfo *> &cells)
 {
     bool dffs_exist = false, dffs_neg = false;
     const NetInfo *cen = nullptr, *clk = nullptr, *sr = nullptr;
-    std::unordered_set<const NetInfo *> locals;
+    static std::unordered_set<const NetInfo *> locals;
+    locals.clear();
 
     for (auto cell : cells) {
         if (bool_or_default(cell->params, "DFF_ENABLE")) {
-- 
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