[AMDGPU] Do not enable GPU sanitizers by default (llvm#126090)

Summary:
This probably wasn't the intended result, but the code here causes
OpenMP to always link in `ockl.bc` which was intentionally not linked.
This results in the OCKL definitions conflicting with the OpenMP ones
and also prevents them from being optimized out (Might be fixed with
newer ROCm that actually builds the visibility correctly).

I'm pretty sure the only reason this didn't break the tests is because
we're smart and pass `-nogpulib` there to keep the environment from
being poisoned with stuff like this.

Author: jhuber6

clang/lib/Driver/ToolChains/AMDGPU.cpp

@@ -1066,7 +1066,7 @@ ROCMToolChain::getCommonDeviceLibNames(const llvm::opt::ArgList &DriverArgs,
   // them all?
   std::tuple<bool, const SanitizerArgs> GPUSan(
       DriverArgs.hasFlag(options::OPT_fgpu_sanitize,
-                         options::OPT_fno_gpu_sanitize, true),
+                         options::OPT_fno_gpu_sanitize, false),
       getSanitizerArgs(DriverArgs));
   bool DAZ = DriverArgs.hasFlag(options::OPT_fgpu_flush_denormals_to_zero,
                                 options::OPT_fno_gpu_flush_denormals_to_zero,
@@ -1099,7 +1099,7 @@ bool AMDGPUToolChain::shouldSkipSanitizeOption(
     return false;
 
   if (!DriverArgs.hasFlag(options::OPT_fgpu_sanitize,
-                          options::OPT_fno_gpu_sanitize, true))
+                          options::OPT_fno_gpu_sanitize, false))
     return true;
 
   auto &Diags = TC.getDriver().getDiags();

clang/test/Driver/hip-sanitize-options.hip

@@ -1,5 +1,5 @@
 // RUN: %clang -### --target=x86_64-unknown-linux-gnu --offload-arch=gfx900:xnack+ \
-// RUN:   -fsanitize=address \
+// RUN:   -fsanitize=address -fgpu-sanitize \
 // RUN:   -nogpuinc --rocm-path=%S/Inputs/rocm \
 // RUN:   %s 2>&1 | FileCheck -check-prefixes=NORDC %s