From: Simon Pilgrim <llvm-dev@redking.me.uk>
Date: Fri, 14 Jan 2022 14:10:07 +0000 (+0000)
Subject: [llvm-profgen] CSProfileGenerator::generateLineNumBasedProfile - use cast<> instead... 
X-Git-Tag: upstream/15.0.7~20460
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=86bbf01d896cfe82acd4379be436a0417976000b;p=platform%2Fupstream%2Fllvm.git

[llvm-profgen] CSProfileGenerator::generateLineNumBasedProfile - use cast<> instead of dyn_cast<> to avoid dereference of nullptr

The pointer is always dereferenced immediately below, so assert the cast is correct instead of returning nullptr
---

diff --git a/llvm/tools/llvm-profgen/ProfileGenerator.cpp b/llvm/tools/llvm-profgen/ProfileGenerator.cpp
index 7155ec4..4fd649d 100644
--- a/llvm/tools/llvm-profgen/ProfileGenerator.cpp
+++ b/llvm/tools/llvm-profgen/ProfileGenerator.cpp
@@ -614,8 +614,8 @@ void CSProfileGenerator::computeSizeForProfiledFunctions() {
 
 void CSProfileGenerator::generateLineNumBasedProfile() {
   for (const auto &CI : SampleCounters) {
-    const StringBasedCtxKey *CtxKey =
-        dyn_cast<StringBasedCtxKey>(CI.first.getPtr());
+    const auto *CtxKey = cast<StringBasedCtxKey>(CI.first.getPtr());
+
     // Get or create function profile for the range
     FunctionSamples &FunctionProfile =
         getFunctionProfileForContext(CtxKey->Context, CtxKey->WasLeafInlined);