From 407659ab0a1048027b3419b163c245036469ec35 Mon Sep 17 00:00:00 2001
From: Fangrui Song <maskray@google.com>
Date: Fri, 30 Nov 2018 23:41:18 +0000
Subject: Revert "Revert r347417 "Re-Reinstate 347294 with a fix for the
 failures.""

It seems the two failing tests can be simply fixed after r348037

Fix 3 cases in Analysis/builtin-functions.cpp
Delete the bad CodeGen/builtin-constant-p.c for now

llvm-svn: 348053
---
 clang/lib/AST/Expr.cpp | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

(limited to 'clang/lib/AST/Expr.cpp')

diff --git a/clang/lib/AST/Expr.cpp b/clang/lib/AST/Expr.cpp
index d8df83def4b..4de1342c77f 100644
--- a/clang/lib/AST/Expr.cpp
+++ b/clang/lib/AST/Expr.cpp
@@ -2594,8 +2594,8 @@ Expr *Expr::IgnoreParenCasts() {
       E = NTTP->getReplacement();
       continue;
     }
-    if (ConstantExpr *CE = dyn_cast<ConstantExpr>(E)) {
-      E = CE->getSubExpr();
+    if (FullExpr *FE = dyn_cast<FullExpr>(E)) {
+      E = FE->getSubExpr();
       continue;
     }
     return E;
@@ -2619,8 +2619,8 @@ Expr *Expr::IgnoreCasts() {
       E = NTTP->getReplacement();
       continue;
     }
-    if (ConstantExpr *CE = dyn_cast<ConstantExpr>(E)) {
-      E = CE->getSubExpr();
+    if (FullExpr *FE = dyn_cast<FullExpr>(E)) {
+      E = FE->getSubExpr();
       continue;
     }
     return E;
@@ -2648,8 +2648,8 @@ Expr *Expr::IgnoreParenLValueCasts() {
                                   = dyn_cast<SubstNonTypeTemplateParmExpr>(E)) {
       E = NTTP->getReplacement();
       continue;
-    } else if (ConstantExpr *CE = dyn_cast<ConstantExpr>(E)) {
-      E = CE->getSubExpr();
+    } else if (FullExpr *FE = dyn_cast<FullExpr>(E)) {
+      E = FE->getSubExpr();
       continue;
     }
     break;
@@ -2920,6 +2920,12 @@ bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
 
     break;
   }
+  case ConstantExprClass: {
+    // FIXME: We should be able to return "true" here, but it can lead to extra
+    // error messages. E.g. in Sema/array-init.c.
+    const Expr *Exp = cast<ConstantExpr>(this)->getSubExpr();
+    return Exp->isConstantInitializer(Ctx, false, Culprit);
+  }
   case CompoundLiteralExprClass: {
     // This handles gcc's extension that allows global initializers like
     // "struct x {int x;} x = (struct x) {};".
@@ -2959,8 +2965,8 @@ bool Expr::isConstantInitializer(ASTContext &Ctx, bool IsForRef,
           const Expr *Elt = ILE->getInit(ElementNo++);
           if (Field->isBitField()) {
             // Bitfields have to evaluate to an integer.
-            llvm::APSInt ResultTmp;
-            if (!Elt->EvaluateAsInt(ResultTmp, Ctx)) {
+            EvalResult Result;
+            if (!Elt->EvaluateAsInt(Result, Ctx)) {
               if (Culprit)
                 *Culprit = Elt;
               return false;
-- 
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