From: Steven Wu <stevenwu@apple.com>
Date: Mon, 20 Oct 2014 15:47:24 +0000 (+0000)
Subject: Fix Intrinsic::getType not working with vararg
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=3ea39890d11480b9e357870d3c7ae63a011be4be;p=oota-llvm.git

Fix Intrinsic::getType not working with vararg

VarArg Intrinsic functions are encoded with "void" type as the last
argument. Now Intrinsic::getType can correctly return all the intrinsic
function type.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220205 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/IR/Function.cpp b/lib/IR/Function.cpp
index 83f71a89162..13747cafec9 100644
--- a/lib/IR/Function.cpp
+++ b/lib/IR/Function.cpp
@@ -739,6 +739,12 @@ FunctionType *Intrinsic::getType(LLVMContext &Context,
   while (!TableRef.empty())
     ArgTys.push_back(DecodeFixedType(TableRef, Tys, Context));
 
+  // DecodeFixedType returns Void for IITDescriptor::Void and IITDescriptor::VarArg
+  // If we see void type as the type of the last argument, it is vararg intrinsic
+  if (!ArgTys.empty() && ArgTys.back()->isVoidTy()) {
+    ArgTys.pop_back();
+    return FunctionType::get(ResultTy, ArgTys, true);
+  }
   return FunctionType::get(ResultTy, ArgTys, false);
 }