From 1c692d50eb9fbe6efcb25c8406b47c1c623ecc69 Mon Sep 17 00:00:00 2001
From: clc5q <clc5q@git.zephyr-software.com>
Date: Sat, 11 Feb 2012 22:47:21 +0000
Subject: [PATCH] Reduce DU chain offsets from unsigned int to unsigned short
to reduce memory usage.
---
SMPDataFlowAnalysis.cpp | 6 +++---
SMPDataFlowAnalysis.h | 7 ++++++-
2 files changed, 9 insertions(+), 4 deletions(-)
diff --git a/SMPDataFlowAnalysis.cpp b/SMPDataFlowAnalysis.cpp
index 5cd46104..744b158d 100644
--- a/SMPDataFlowAnalysis.cpp
+++ b/SMPDataFlowAnalysis.cpp
@@ -1228,7 +1228,7 @@ void SMPPhiFunction::Dump(void) const {
SMPDefUseChain::SMPDefUseChain(void) {
this->SSAName.type = o_void;
this->RefInstrs.clear();
- this->RefInstrs.push_back(BADADDR);
+ this->RefInstrs.push_back((unsigned short) BADADDR);
this->IndWrite = false;
return;
}
@@ -1253,13 +1253,13 @@ void SMPDefUseChain::SetName(op_t Name) {
// Set the DEF instruction.
void SMPDefUseChain::SetDef(ea_t Def) {
- this->RefInstrs[0] = Def;
+ this->RefInstrs[0] = (unsigned short) Def;
return;
}
// Push a USE onto the list
void SMPDefUseChain::PushUse(ea_t Use) {
- this->RefInstrs.push_back(Use);
+ this->RefInstrs.push_back((unsigned short) Use);
return;
}
diff --git a/SMPDataFlowAnalysis.h b/SMPDataFlowAnalysis.h
index 91906e9d..4a25e901 100644
--- a/SMPDataFlowAnalysis.h
+++ b/SMPDataFlowAnalysis.h
@@ -532,7 +532,12 @@ public:
private:
op_t SSAName; // What variable is defined and used in the chain?
bool IndWrite; // Does an indirect memory write occur within the chain?
- vector<ea_t> RefInstrs; // First is always DEF, rest are USE.
+ // Keep DEF and USE addrs as unsigned short offsets from BaseAddr of block.
+ // The BaseAddr of the block is 1 less than the first inst addr of the block,
+ // so that this value can be used as a flag to indicate that the value was
+ // live-in and upward-exposed upon block entry and does not have a real DEF
+ // in the block for that SSANum.
+ vector<unsigned short> RefInstrs; // First is always DEF, rest are USE.
}; // end class SMPDefUseChain
class SMPDUChainArray {
--
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