[PATCH] D78294: [Fixed Point] Move the compassign LHS type correction a bit further down. NFCI.

[Bevin Hansson via Phabricator via cfe-commits]

ebevhan created this revision.
ebevhan added a reviewer: leonardchan.
Herald added a project: clang.
Herald added a subscriber: cfe-commits.

We can simplify the LHSTy correction for
fixed-point compassign by moving it below
the point where we know we have a compound
assignment.

Also, we shouldn't look at the LHS and RHS
separately; look at the computation result
type instead.

Looking at the LHS and RHS is also wrong
for compassigns with fixed and floating
point (though this does not work upstream
yet).


Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D78294

Files:
  clang/lib/Sema/SemaExpr.cpp


Index: clang/lib/Sema/SemaExpr.cpp
===================================================================
--- clang/lib/Sema/SemaExpr.cpp
+++ clang/lib/Sema/SemaExpr.cpp
@@ -13639,14 +13639,6 @@
   if (ResultTy.isNull() || LHS.isInvalid() || RHS.isInvalid())
     return ExprError();
 
-  // The LHS is not converted to the result type for fixed-point compound
-  // assignment as the common type is computed on demand. Reset the CompLHSTy
-  // to the LHS type we would have gotten after unary conversions.
-  if (!CompLHSTy.isNull() &&
-      (LHS.get()->getType()->isFixedPointType() ||
-       RHS.get()->getType()->isFixedPointType()))
-    CompLHSTy = UsualUnaryConversions(LHS.get()).get()->getType();
-
   if (ResultTy->isRealFloatingType() &&
       (getLangOpts().getFPRoundingMode() != RoundingMode::NearestTiesToEven ||
        getLangOpts().getFPExceptionMode() != LangOptions::FPE_Ignore))
@@ -13705,6 +13697,12 @@
     OK = LHS.get()->getObjectKind();
   }
 
+  // The LHS is not converted to the result type for fixed-point compound
+  // assignment as the common type is computed on demand. Reset the CompLHSTy
+  // to the LHS type we would have gotten after unary conversions.
+  if (CompResultTy->isFixedPointType())
+    CompLHSTy = UsualUnaryConversions(LHS.get()).get()->getType();
+
   if (ConvertHalfVec)
     return convertHalfVecBinOp(*this, LHS, RHS, Opc, ResultTy, VK, OK, true,
                                OpLoc, FPFeatures);


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D78294.258033.patch
Type: text/x-patch
Size: 1457 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20200416/e628eb2b/attachment.bin>