From f29c8ad917e5fdc8fdd3d43707073be217bad625 Mon Sep 17 00:00:00 2001
From: Chris Lattner <sabre@nondot.org>
Date: Sat, 18 Apr 2009 07:01:54 +0000
Subject: [PATCH] fix incorrect lowering of __builtin_ia32_shufpd,
 rdar://6803924

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@69428 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/CodeGen/CGBuiltin.cpp |  3 ++-
 test/CodeGen/x86.c        | 10 +++++++++-
 2 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 5ef01ac5f0..e7adf72190 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -891,7 +891,8 @@ Value *CodeGenFunction::EmitX86BuiltinExpr(unsigned BuiltinID,
   }
   case X86::BI__builtin_ia32_shufpd: {
     unsigned i = cast<ConstantInt>(Ops[2])->getZExtValue();
-    return EmitShuffleVector(Ops[0], Ops[1], i & 1, (i & 2) + 2, "shufpd");
+    return EmitShuffleVector(Ops[0], Ops[1], i & 1,
+                             ((i & 2) >> 1)+2, "shufpd");
   }
   case X86::BI__builtin_ia32_punpcklbw128:
     return EmitShuffleVector(Ops[0], Ops[1], 0, 16, 1, 17, 2, 18, 3, 19,
diff --git a/test/CodeGen/x86.c b/test/CodeGen/x86.c
index d12f26c0df..10808dca87 100644
--- a/test/CodeGen/x86.c
+++ b/test/CodeGen/x86.c
@@ -8,8 +8,16 @@
 // RUN: grep "st" %t1 &&
 // RUN: grep "st(1)" %t1
 
-void f() {
+void test1() {
   int d1, d2;
   asm ("" : "=a" (d1), "=b" (d2) :
        "c" (0), "d" (0), "S" (0), "D" (0), "t" (0), "u" (0));
 }
+
+
+// rdar://6803924
+typedef double T __attribute__ ((__vector_size__ (16)));
+T test2(T va) {
+  return __builtin_ia32_shufpd(va, va, 3);
+}
+