[PATCH][CodeGen] Add missing intrinsic lowering for sin, cos and ceil

[Josh Klontz]

This was discovered when trying to run lli on a function with an
llvm.cos.f32 intrinsic. Hopefully this can get applied to the 3.5 branch as
well. Thanks!
-Josh
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diff --git a/lib/CodeGen/IntrinsicLowering.cpp b/lib/CodeGen/IntrinsicLowering.cpp
index a8b8600..c573f66 100644
--- a/lib/CodeGen/IntrinsicLowering.cpp
+++ b/lib/CodeGen/IntrinsicLowering.cpp
@@ -527,6 +527,18 @@ void IntrinsicLowering::LowerIntrinsicCall(CallInst *CI) {
     ReplaceFPIntrinsicWithCall(CI, "powf", "pow", "powl");
     break;
   }
+  case Intrinsic::sin: {
+    ReplaceFPIntrinsicWithCall(CI, "sinf", "sin", "sinl");
+    break;
+  }
+  case Intrinsic::cos: {
+    ReplaceFPIntrinsicWithCall(CI, "cosf", "cos", "cosl");
+    break;
+  }
+  case Intrinsic::ceil: {
+    ReplaceFPIntrinsicWithCall(CI, "ceilf", "ceil", "ceill");
+    break;
+  }
   case Intrinsic::flt_rounds:
      // Lower to "round to the nearest"
      if (!CI->getType()->isVoidTy())