Create nodes for inline asm so that we don't crash looking for the node later.

llvm-svn: 44267

2 files changed, 16 insertions, 0 deletions

diff --git a/llvm/lib/Analysis/IPA/Andersens.cpp b/llvm/lib/Analysis/IPA/Andersens.cpp
index 08b9dc3de22..da4fa82f06a 100644
--- a/llvm/lib/Analysis/IPA/Andersens.cpp
+++ b/llvm/lib/Analysis/IPA/Andersens.cpp
@@ -668,6 +668,14 @@ void Andersens::IdentifyObjects(Module &M) {
         if (AllocationInst *AI = dyn_cast<AllocationInst>(&*II))
           ObjectNodes[AI] = NumObjects++;
       }
+
+      // Calls to inline asm need to be added as well because the callee isn't
+      // referenced anywhere else.
+      if (CallInst *CI = dyn_cast<CallInst>(&*II)) {
+        Value *Callee = CI->getCalledValue();
+        if (isa<InlineAsm>(Callee))
+          ValueNodes[Callee] = NumObjects++;
+      }
     }
   }
 
diff --git a/llvm/test/Analysis/Andersens/2007-11-19-InlineAsm.ll b/llvm/test/Analysis/Andersens/2007-11-19-InlineAsm.ll
new file mode 100644
index 00000000000..c1ab6c7b1a4
--- /dev/null
+++ b/llvm/test/Analysis/Andersens/2007-11-19-InlineAsm.ll
@@ -0,0 +1,8 @@
+; RUN: llvm-as < %s | opt -anders-aa -disable-output
+
+define void @x(i16 %Y) {
+entry:
+  %tmp = call i16 asm "bswap $0", "=r,r"(i16 %Y)
+  ret void
+}
+