[XRAY][MIPS] Add -fxray-instrument for mips/mipsel/mips64/mips64el

[slthakur]

Summary

Adds xray instrument option for mips/mipsel/mips64/mips64el.

[slthakur]

Added test for xray attribute support on mips.

[dberris]

Thanks @slthakur!

[sdardis]

Given the updated patches support mips64 / mips64el, this one needs updating as well. Otherwise LGTM.

[slthakur]

Adding support for mips64/mips64el.

[slthakur]

Committed in revision 295163

lib/Driver/Tools.cpp

if (Args.hasFlag(options::OPT_fxray_instrument,
                    options::OPT_fnoxray_instrument, false)) {
     const char *const XRayInstrumentOption = "-fxray-instrument";
     if (Triple.getOS() == llvm::Triple::Linux)
       switch (Triple.getArch()) {
       case llvm::Triple::x86_64:
       case llvm::Triple::arm:
       case llvm::Triple::aarch64:
       case llvm::Triple::ppc64le:
+      case llvm::Triple::mips:
+      case llvm::Triple::mipsel:
+      case llvm::Triple::mips64:
+      case llvm::Triple::mips64el:
         // Supported.
         break;
       default:
         D.Diag(diag::err_drv_clang_unsupported)
             << (std::string(XRayInstrumentOption) + " on " + Triple.str());
       }
     else
       D.Diag(diag::err_drv_clang_unsupported)

test/CodeGen/xray-attributes-supported-mips.cpp

+// RUN: %clang_cc1 %s -fxray-instrument -std=c++11 -x c++ -emit-llvm -o - -triple mips-unknown-linux-gnu | FileCheck %s
+// RUN: %clang_cc1 %s -fxray-instrument -std=c++11 -x c++ -emit-llvm -o - -triple mipsel-unknown-linux-gnu | FileCheck %s
+// RUN: %clang_cc1 %s -fxray-instrument -std=c++11 -x c++ -emit-llvm -o - -triple mips64-unknown-linux-gnu | FileCheck %s
+// RUN: %clang_cc1 %s -fxray-instrument -std=c++11 -x c++ -emit-llvm -o - -triple mips64el-unknown-linux-gnu | FileCheck %s
+
+// Make sure that the LLVM attribute for XRay-annotated functions do show up.
+[[clang::xray_always_instrument]] void foo() {
+// CHECK: define void @_Z3foov() #0
+};
+
+[[clang::xray_never_instrument]] void bar() {
+// CHECK: define void @_Z3barv() #1
+};
+
+// CHECK: #0 = {{.*}}"function-instrument"="xray-always"
+// CHECK: #1 = {{.*}}"function-instrument"="xray-never"

test/Driver/XRay/xray-instrument-cpu.c

 // RUN: not %clang -o /dev/null -v -fxray-instrument -c %s
-// XFAIL: amd64-, x86_64-, x86_64h-, arm, aarch64, arm64, powerpc64le-
+// XFAIL: amd64-, x86_64-, x86_64h-, arm, aarch64, arm64, powerpc64le-, mips, mipsel, mips64, mips64el
 // REQUIRES: linux
 typedef int a;