diff --git a/llvm/test/CodeGen/X86/cpus-amd-no-x86_64.ll b/llvm/test/CodeGen/X86/cpus-amd-no-x86_64.ll
new file mode 100644
index 000000000000..0dadc599abdb
--- /dev/null
+++ b/llvm/test/CodeGen/X86/cpus-amd-no-x86_64.ll
@@ -0,0 +1,17 @@
+; Check that we reject 64-bit mode on 32-bit only CPUs.
+; CHECK-NO-ERROR-NOT: not a recognized processor for this target
+; CHECK-ERROR64: LLVM ERROR: 64-bit code requested on a subtarget that doesn't support it!
+
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=k6 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=k6-2 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=k6-3 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon-tbird 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon-4 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon-xp 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon-mp 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=geode 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+
+define void @foo() {
+  ret void
+}
diff --git a/llvm/test/CodeGen/X86/cpus-intel-no-x86_64.ll b/llvm/test/CodeGen/X86/cpus-intel-no-x86_64.ll
new file mode 100644
index 000000000000..d28ac9a83fd8
--- /dev/null
+++ b/llvm/test/CodeGen/X86/cpus-intel-no-x86_64.ll
@@ -0,0 +1,24 @@
+; Check that we reject 64-bit mode on 32-bit only CPUs.
+; CHECK-NO-ERROR-NOT: not a recognized processor for this target
+; CHECK-ERROR64: LLVM ERROR: 64-bit code requested on a subtarget that doesn't support it!
+
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=i386 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=i486 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=i586 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium-mmx 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=i686 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentiumpro 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium2 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium3 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium3m 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium-m 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium4 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium4m 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=yonah 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=prescott 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=lakemont 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
+
+define void @foo() {
+  ret void
+}
diff --git a/llvm/test/CodeGen/X86/cpus-no-x86_64.ll b/llvm/test/CodeGen/X86/cpus-no-x86_64.ll
index de873c81205a..e2e000386717 100644
--- a/llvm/test/CodeGen/X86/cpus-no-x86_64.ll
+++ b/llvm/test/CodeGen/X86/cpus-no-x86_64.ll
@@ -2,31 +2,6 @@
 ; CHECK-NO-ERROR-NOT: not a recognized processor for this target
 ; CHECK-ERROR64: LLVM ERROR: 64-bit code requested on a subtarget that doesn't support it!
 
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=i386 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=i486 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=i586 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium-mmx 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=i686 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentiumpro 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium2 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium3 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium3m 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium-m 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium4 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=pentium4m 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=yonah 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=prescott 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=lakemont 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=k6 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=k6-2 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=k6-3 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon-tbird 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon-4 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon-xp 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=athlon-mp 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
-; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=geode 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
 ; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=winchip-c6 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
 ; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=winchip2 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64
 ; RUN: not llc < %s -o /dev/null -mtriple=x86_64-unknown-unknown -mcpu=c3 2>&1 | FileCheck %s --check-prefix=CHECK-ERROR64