[PATCH] D116701: Respect -fsanitize-memory-param-retval flag.

[Kevin Athey via Phabricator via cfe-commits]

kda created this revision.
kda added a reviewer: vitalybuka.
kda requested review of this revision.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

Implementation of flag introduced in https://reviews.llvm.org/D116633


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D116701

Files:
  clang/lib/CodeGen/CGCall.cpp
  clang/test/CodeGen/attr-noundef.cpp
  clang/test/CodeGen/indirect-noundef.cpp


Index: clang/test/CodeGen/indirect-noundef.cpp
===================================================================
--- clang/test/CodeGen/indirect-noundef.cpp
+++ clang/test/CodeGen/indirect-noundef.cpp
@@ -1,4 +1,5 @@
 // RUN: %clang -cc1 -x c++ -triple x86_64-unknown-unknown -O0 -emit-llvm -enable-noundef-analysis -o - %s | FileCheck %s
+// RUN: %clang -cc1 -x c++ -triple x86_64-unknown-unknown -O0 -emit-llvm -fsanitize-memory-param-retval -o - %s | FileCheck %s
 
 union u1 {
   int val;
Index: clang/test/CodeGen/attr-noundef.cpp
===================================================================
--- clang/test/CodeGen/attr-noundef.cpp
+++ clang/test/CodeGen/attr-noundef.cpp
@@ -1,5 +1,7 @@
 // RUN: %clang -cc1 -triple x86_64-gnu-linux -x c++ -S -emit-llvm -enable-noundef-analysis %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-INTEL
 // RUN: %clang -cc1 -triple aarch64-gnu-linux -x c++ -S -emit-llvm -enable-noundef-analysis %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-AARCH
+// RUN: %clang -cc1 -triple x86_64-gnu-linux -x c++ -S -emit-llvm -fsanitize-memory-param-retval %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-INTEL
+// RUN: %clang -cc1 -triple aarch64-gnu-linux -x c++ -S -emit-llvm -fsanitize-memory-param-retval %s -o - | FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-AARCH
 
 //************ Passing structs by value
 // TODO: No structs may currently be marked noundef
Index: clang/lib/CodeGen/CGCall.cpp
===================================================================
--- clang/lib/CodeGen/CGCall.cpp
+++ clang/lib/CodeGen/CGCall.cpp
@@ -2243,7 +2243,9 @@
                      getLangOpts().Sanitize.has(SanitizerKind::Return);
 
   // Determine if the return type could be partially undef
-  if (CodeGenOpts.EnableNoundefAttrs && HasStrictReturn) {
+  if ((CodeGenOpts.EnableNoundefAttrs ||
+       CodeGenOpts.SanitizeMemoryParamRetval) &&
+      HasStrictReturn) {
     if (!RetTy->isVoidType() && RetAI.getKind() != ABIArgInfo::Indirect &&
         DetermineNoUndef(RetTy, getTypes(), DL, RetAI))
       RetAttrs.addAttribute(llvm::Attribute::NoUndef);
@@ -2378,7 +2380,9 @@
 
     // Decide whether the argument we're handling could be partially undef
     bool ArgNoUndef = DetermineNoUndef(ParamType, getTypes(), DL, AI);
-    if (CodeGenOpts.EnableNoundefAttrs && ArgNoUndef)
+    if ((CodeGenOpts.EnableNoundefAttrs ||
+         CodeGenOpts.SanitizeMemoryParamRetval) &&
+        ArgNoUndef)
       Attrs.addAttribute(llvm::Attribute::NoUndef);
 
     // 'restrict' -> 'noalias' is done in EmitFunctionProlog when we


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