[OpenCL] Added a LIT test for ensuring address space mangling is done the same both in OpenCL1.2 and OpenCL2.0.

[Anastasia]

test/CodeGenOpenCL/address-spaces-mangling.cl

44

Just trying to understand what we are missing in the current testing. Does the additional code test something different from the previous one? Could we reuse the old test but just run it with the other OpenCL versions?

Also do we have any different behavior in the mangler depending on OpenCL versions?

[Anastasia]

LGTM! Thanks!

[bader]

@echuraev, please, request commit access as described here: http://llvm.org/docs/DeveloperPolicy.html#obtaining-commit-access

test/CodeGenOpenCL/address-spaces-mangling.cl

 // RUN: %clang_cc1 %s -ffake-address-space-map -faddress-space-map-mangling=yes -triple %itanium_abi_triple -emit-llvm -o - | FileCheck -check-prefix=ASMANG %s
 // RUN: %clang_cc1 %s -ffake-address-space-map -faddress-space-map-mangling=no -triple %itanium_abi_triple -emit-llvm -o - | FileCheck -check-prefix=NOASMANG %s
 
+// We check that the address spaces are mangled the same in both version of OpenCL
+// RUN: %clang_cc1 %s -triple spir-unknown-unknown -cl-std=CL2.0 -emit-llvm -o - | FileCheck -check-prefix=OCL-20 %s
+// RUN: %clang_cc1 %s -triple spir-unknown-unknown -cl-std=CL1.2 -emit-llvm -o - | FileCheck -check-prefix=OCL-12 %s
+
 // We can't name this f as private is equivalent to default
 // no specifier given address space so we get multiple definition
 // warnings, but we do want it for comparison purposes.
 __attribute__((overloadable))
 void ff(int *arg) { }
 // ASMANG: @_Z2ffPi
 // NOASMANG: @_Z2ffPi
+// OCL-20-DAG: @_Z2ffPU3AS4i
+// OCL-12-DAG: @_Z2ffPi
 
 __attribute__((overloadable))
 void f(private int *arg) { }
 // ASMANG: @_Z1fPi
 // NOASMANG: @_Z1fPi
+// OCL-20-DAG: @_Z1fPi
+// OCL-12-DAG: @_Z1fPi
 
 __attribute__((overloadable))
 void f(global int *arg) { }
 // ASMANG: @_Z1fPU3AS1i
 // NOASMANG: @_Z1fPU8CLglobali
+// OCL-20-DAG: @_Z1fPU3AS1i
+// OCL-12-DAG: @_Z1fPU3AS1i
 
 __attribute__((overloadable))
 void f(local int *arg) { }
 // ASMANG: @_Z1fPU3AS2i
 // NOASMANG: @_Z1fPU7CLlocali
+// OCL-20-DAG: @_Z1fPU3AS2i
+// OCL-12-DAG: @_Z1fPU3AS2i
 
 __attribute__((overloadable))
 void f(constant int *arg) { }
 // ASMANG: @_Z1fPU3AS3i
 // NOASMANG: @_Z1fPU10CLconstanti
+// OCL-20-DAG: @_Z1fPU3AS3i
+// OCL-12-DAG: @_Z1fPU3AS3i