[mandatory-inlining] Fix undefined behavior.

gottesmm · gottesmm · commit 9401acbd23fa · 2019-01-27T12:32:08.000-08:00
diff --git a/lib/SILOptimizer/Mandatory/MandatoryInlining.cpp b/lib/SILOptimizer/Mandatory/MandatoryInlining.cpp
@@ -502,7 +502,7 @@ static SILValue getLoadedCalleeValue(LoadInst *li) {
   }
 
   // Make sure that our project_box has a single store user and our load user.
-  StoreInst *si;
+  StoreInst *si = nullptr;
   for (Operand *use : pbi->getUses()) {
     // If this use is our load... continue.
     if (use->getUser() == li)

Original file line number	Diff line number	Diff line change
`@@ -502,7 +502,7 @@ static SILValue getLoadedCalleeValue(LoadInst *li) {`
`502`	`502`	`}`
`503`	`503`
`504`	`504`	`// Make sure that our project_box has a single store user and our load user.`
`505`		`- StoreInst *si;`
	`505`	`+ StoreInst *si = nullptr;`
`506`	`506`	`for (Operand *use : pbi->getUses()) {`
`507`	`507`	`// If this use is our load... continue.`
`508`	`508`	`if (use->getUser() == li)`