[llvm] 1970eef - [NFC][StackSafety] Add a couple of early returns

[Vitaly Buka via llvm-commits]

Author: Vitaly Buka
Date: 2020-08-09T23:42:09-07:00
New Revision: 1970eefb17e9790ed8a1087805ac2a05a7f36727

URL: https://github.com/llvm/llvm-project/commit/1970eefb17e9790ed8a1087805ac2a05a7f36727
DIFF: https://github.com/llvm/llvm-project/commit/1970eefb17e9790ed8a1087805ac2a05a7f36727.diff

LOG: [NFC][StackSafety] Add a couple of early returns

Added: 
    

Modified: 
    llvm/lib/Analysis/StackSafetyAnalysis.cpp

Removed: 
    


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diff  --git a/llvm/lib/Analysis/StackSafetyAnalysis.cpp b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
index 156f315c1751..db3eb0bc49a5 100644
--- a/llvm/lib/Analysis/StackSafetyAnalysis.cpp
+++ b/llvm/lib/Analysis/StackSafetyAnalysis.cpp
@@ -668,10 +668,11 @@ void resolveAllCalls(UseInfo<GlobalValue> &Use,
       return Use.updateRange(FullSet);
     }
     const ConstantRange *Found = findParamAccess(*FS, C.ParamNo);
-    if (!Found)
+    if (!Found || Found->isFullSet())
       return Use.updateRange(FullSet);
     ConstantRange Access = Found->sextOrTrunc(Use.Range.getBitWidth());
-    Use.updateRange(addOverflowNever(Access, C.Offset));
+    if (!Access.isEmptySet())
+      Use.updateRange(addOverflowNever(Access, C.Offset));
     C.Callee = nullptr;
   }