[PATCH] D115320: Avoid setting tbaa information on store of return type of call to inline assember

[Sindhu Chittireddy via Phabricator via cfe-commits]

schittir updated this revision to Diff 394173.
schittir added a comment.

Rebasing patch to see if the test failure will go away.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D115320/new/

https://reviews.llvm.org/D115320

Files:
  clang/lib/CodeGen/CGStmt.cpp
  clang/lib/CodeGen/CodeGenFunction.h
  clang/test/CodeGen/avoidTBAAonASMstore.cpp


Index: clang/test/CodeGen/avoidTBAAonASMstore.cpp
===================================================================
--- /dev/null
+++ clang/test/CodeGen/avoidTBAAonASMstore.cpp
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -triple i386-unknown-linux-gnu -O2 -disable-llvm-passes -fasm-blocks %s -emit-llvm -o - | FileCheck --check-prefix=STORE-LINE %s
+double foo(double z) {
+  // CHECK-LABEL: define{{.*}} double @_Z3food
+  unsigned short ControlWord;
+  __asm { fnstcw word ptr[ControlWord]}
+  ;
+  // STORE-LINE: store i64 %{{.*}}, i64* %{{.*}},
+  // STORE-LINE-NOT: align 4, !tbaa
+  // STORE-LINE-SAME: align 4
+  return z;
+}
Index: clang/lib/CodeGen/CodeGenFunction.h
===================================================================
--- clang/lib/CodeGen/CodeGenFunction.h
+++ clang/lib/CodeGen/CodeGenFunction.h
@@ -2504,6 +2504,13 @@
                             BaseInfo, TBAAInfo);
   }
 
+  LValue
+  MakeAddrLValueWithoutTBAA(Address Addr, QualType T,
+                            AlignmentSource Source = AlignmentSource::Type) {
+    return LValue::MakeAddr(Addr, T, getContext(), LValueBaseInfo(Source),
+                            TBAAAccessInfo());
+  }
+
   LValue MakeNaturalAlignPointeeAddrLValue(llvm::Value *V, QualType T);
   LValue MakeNaturalAlignAddrLValue(llvm::Value *V, QualType T);
 
Index: clang/lib/CodeGen/CGStmt.cpp
===================================================================
--- clang/lib/CodeGen/CGStmt.cpp
+++ clang/lib/CodeGen/CGStmt.cpp
@@ -2454,7 +2454,7 @@
     const ABIArgInfo &RetAI = CurFnInfo->getReturnInfo();
     if (RetAI.isDirect() || RetAI.isExtend()) {
       // Make a fake lvalue for the return value slot.
-      LValue ReturnSlot = MakeAddrLValue(ReturnValue, FnRetTy);
+      LValue ReturnSlot = MakeAddrLValueWithoutTBAA(ReturnValue, FnRetTy);
       CGM.getTargetCodeGenInfo().addReturnRegisterOutputs(
           *this, ReturnSlot, Constraints, ResultRegTypes, ResultTruncRegTypes,
           ResultRegDests, AsmString, S.getNumOutputs());


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D115320.394173.patch
Type: text/x-patch
Size: 2011 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20211214/9ff65cf7/attachment-0001.bin>