[Clang] Enable nsan instrumentation pass (#97359)

Enable nsan instrumentation pass

Author: alexander-shaposhnikov

clang/lib/CodeGen/BackendUtil.cpp

@@ -76,6 +76,7 @@
 #include "llvm/Transforms/Instrumentation/LowerAllowCheckPass.h"
 #include "llvm/Transforms/Instrumentation/MemProfiler.h"
 #include "llvm/Transforms/Instrumentation/MemorySanitizer.h"
+#include "llvm/Transforms/Instrumentation/NumericalStabilitySanitizer.h"
 #include "llvm/Transforms/Instrumentation/PGOInstrumentation.h"
 #include "llvm/Transforms/Instrumentation/SanitizerBinaryMetadata.h"
 #include "llvm/Transforms/Instrumentation/SanitizerCoverage.h"
@@ -707,6 +708,9 @@ static void addSanitizers(const Triple &TargetTriple,
       MPM.addPass(createModuleToFunctionPassAdaptor(ThreadSanitizerPass()));
     }
 
+    if (LangOpts.Sanitize.has(SanitizerKind::NumericalStability))
+      MPM.addPass(NumericalStabilitySanitizerPass());
+
     auto ASanPass = [&](SanitizerMask Mask, bool CompileKernel) {
       if (LangOpts.Sanitize.has(Mask)) {
         bool UseGlobalGC = asanUseGlobalsGC(TargetTriple, CodeGenOpts);

clang/test/CodeGen/no-skipped-passes-O0-opt-bisect.c

@@ -9,6 +9,7 @@
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -O0 %s -fdebug-pass-manager -emit-llvm -o /dev/null -fsanitize=local-bounds 2>&1 | FileCheck %s
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -O0 %s -fdebug-pass-manager -emit-llvm -o /dev/null -fsanitize=dataflow 2>&1 | FileCheck %s
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -O0 %s -fdebug-pass-manager -emit-llvm -o /dev/null -fsanitize-coverage-trace-pc-guard 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -O0 %s -fdebug-pass-manager -emit-llvm -o /dev/null -fsanitize=numerical 2>&1 | FileCheck %s
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -O0 %s -fdebug-pass-manager -emit-llvm -o /dev/null -fmemory-profile 2>&1 | FileCheck %s
 
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -mllvm -opt-bisect-limit=0 %s -fdebug-pass-manager -emit-llvm -o /dev/null 2>&1 | FileCheck %s

clang/test/CodeGen/nsan-basic.c

@@ -0,0 +1,7 @@
+// RUN: %clang_cc1 -triple x86_64 -emit-llvm -o - -fsanitize=numerical %s | FileCheck %s
+
+// CHECK: Function Attrs: noinline nounwind optnone sanitize_numerical_stability
+float add(float x, float y) {
+  float z = x + y;
+  return z;
+}

clang/test/CodeGen/sanitizer-module-constructor.c

@@ -1,6 +1,7 @@
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=address -O3 -emit-llvm -fdebug-pass-manager -o - %s 2>&1 | FileCheck %s
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=thread -O3 -emit-llvm -fdebug-pass-manager -o - %s 2>&1 | FileCheck %s
 // RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=memory -O3 -emit-llvm -fdebug-pass-manager -o - %s 2>&1 | FileCheck %s
+// RUN: %clang_cc1 -triple x86_64-linux-gnu -fsanitize=numerical -O3 -emit-llvm -fdebug-pass-manager -o - %s 2>&1 | FileCheck %s
 
 // This is regression test for PR42877