check for MSVC environment

Author: AdamGlass

llvm/include/llvm/IR/Attributes.td

@@ -442,7 +442,7 @@ def : CompatRule<"isEqual<UseSampleProfileAttr>">;
 def : CompatRule<"isEqual<NoProfileAttr>">;
 def : CompatRule<"checkDenormMode">;
 def : CompatRule<"checkStrictFP">;
-def : CompatRule<"checkSections">;
+def : CompatRule<"checkSectionsMSVC">;
 def : CompatRuleStrAttr<"isEqual", "sign-return-address">;
 def : CompatRuleStrAttr<"isEqual", "sign-return-address-key">;
 def : CompatRuleStrAttr<"isEqual", "branch-protection-pauth-lr">;

llvm/lib/IR/Attributes.cpp

@@ -2507,7 +2507,10 @@ static bool checkStrictFP(const Function &Caller, const Function &Callee) {
          Caller.getAttributes().hasFnAttr(Attribute::StrictFP);
 }
 
-static bool checkSections(const Function &Caller, const Function &Callee) {
+static bool checkSectionsMSVC(const Function &Caller, const Function &Callee) {
+  if (!Caller.getParent()->getTargetTriple().isWindowsMSVCEnvironment())
+    return true;
+
   // Implement MSVC compatible cross-section inlining rules
   StringRef CallerSection = Caller.getSection();
   StringRef CalleeSection = Callee.getSection();