Generalize dead stores.

Stores are dead if the address is from an alloca and all uses of the address are stores, not just when it's a single store. Change-Id: I5b65a64e21b9e398922e5440c35f0d318c03e911 Reviewed-on: https://swiftshader-review.googlesource.com/8574Tested-by: Nicolas Capens <capn@google.com> Reviewed-by: Alexis Hétu <sugoi@google.com> Reviewed-by: Nicolas Capens <capn@google.com>

Generalize dead stores.
29eee717 · Nicolas Capens · da721421 · 29eee717
Commit 29eee717 authored Jan 27, 2017 by Nicolas Capens
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Optimizer.cpp src/Reactor/Optimizer.cpp +1 -1

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--- a/src/Reactor/Optimizer.cpp
+++ b/src/Reactor/Optimizer.cpp
@@ -456,7 +456,7 @@ namespace

 				if(def && llvm::isa<Ice::InstAlloca>(def))
 				{
-					return uses[address].size() == 1;   // Dead if this store is the only use
+					return uses[address].size() == uses[address].stores.size();   // Dead if all uses are stores
 				}
 			}
 		}