R600: Fix segfault in R600TextureIntrinsicReplacer

This pass was segfaulting when it ran into a non-intrinsic function
call.  Function calls are not supported, so now instead of segfaulting,
we will get an assertion failure with a nice error message.

I'm not sure how to test this using lit.

llvm-svn: 190076

diff --git a/llvm/lib/Target/R600/R600TextureIntrinsicsReplacer.cpp b/llvm/lib/Target/R600/R600TextureIntrinsicsReplacer.cpp
index 37d9059..d4b8ec0 100644 (file)
--- a/llvm/lib/Target/R600/R600TextureIntrinsicsReplacer.cpp
+++ b/llvm/lib/Target/R600/R600TextureIntrinsicsReplacer.cpp
@@ -260,6 +260,9 @@ public:
   }
 
   void visitCallInst(CallInst &I) {
+    if (!I.getCalledFunction()) {
+      return;
+    }
     StringRef Name = I.getCalledFunction()->getName();
     if (Name == "llvm.AMDGPU.tex") {
       ReplaceTexIntrinsic(I, false, TexSign, "llvm.R600.tex", "llvm.R600.texc");