[Clang/Test]: Rename enable_noundef_analysis to disable-noundef-analysis and turn it off by default

Turning on `enable_noundef_analysis` flag allows better codegen by removing freeze instructions.
I modified clang by renaming `enable_noundef_analysis` flag to `disable-noundef-analysis` and turning it off by default.

Test updates are made as a separate patch: D108453

Reviewed By: eugenis

Differential Revision: https://reviews.llvm.org/D105169

1 files changed, 2 insertions, 2 deletions

diff --git a/clang/lib/CodeGen/CGCall.cpp b/clang/lib/CodeGen/CGCall.cpp
index cd05fa7..cc6047ff 100644
--- a/clang/lib/CodeGen/CGCall.cpp
+++ b/clang/lib/CodeGen/CGCall.cpp
@@ -2243,7 +2243,7 @@ void CodeGenModule::ConstructAttributeList(StringRef Name,
                      getLangOpts().Sanitize.has(SanitizerKind::Return);
 
   // Determine if the return type could be partially undef
-  if (CodeGenOpts.EnableNoundefAttrs && HasStrictReturn) {
+  if (!CodeGenOpts.DisableNoundefAttrs && HasStrictReturn) {
     if (!RetTy->isVoidType() && RetAI.getKind() != ABIArgInfo::Indirect &&
         DetermineNoUndef(RetTy, getTypes(), DL, RetAI))
       RetAttrs.addAttribute(llvm::Attribute::NoUndef);
@@ -2377,7 +2377,7 @@ void CodeGenModule::ConstructAttributeList(StringRef Name,
     }
 
     // Decide whether the argument we're handling could be partially undef
-    if (CodeGenOpts.EnableNoundefAttrs &&
+    if (!CodeGenOpts.DisableNoundefAttrs &&
         DetermineNoUndef(ParamType, getTypes(), DL, AI)) {
       Attrs.addAttribute(llvm::Attribute::NoUndef);
     }