From: Peter Collingbourne <peter@pcc.me.uk>
Date: Fri, 16 Dec 2016 22:10:52 +0000 (+0000)
Subject: IRGen: Fix assertion failure when creating debug info for an integer constant wider... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=0dd752d8bd7d523b134d571d2b7882d0ebfc08fc;p=clang

IRGen: Fix assertion failure when creating debug info for an integer constant wider than 64 bits.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@289996 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CGDebugInfo.cpp b/lib/CodeGen/CGDebugInfo.cpp
index 9b53152fac..2bce804331 100644
--- a/lib/CodeGen/CGDebugInfo.cpp
+++ b/lib/CodeGen/CGDebugInfo.cpp
@@ -3759,12 +3759,15 @@ void CGDebugInfo::EmitGlobalVariable(const ValueDecl *VD, const APValue &Init) {
   if (GV)
     return;
   llvm::DIExpression *InitExpr = nullptr;
-  if (Init.isInt())
-    InitExpr =
-        DBuilder.createConstantValueExpression(Init.getInt().getExtValue());
-  else if (Init.isFloat() && CGM.getContext().getTypeSize(VD->getType()) <= 64)
-    InitExpr = DBuilder.createConstantValueExpression(
-        Init.getFloat().bitcastToAPInt().getZExtValue());
+  if (CGM.getContext().getTypeSize(VD->getType()) <= 64) {
+    // FIXME: Add a representation for integer constants wider than 64 bits.
+    if (Init.isInt())
+      InitExpr =
+          DBuilder.createConstantValueExpression(Init.getInt().getExtValue());
+    else if (Init.isFloat())
+      InitExpr = DBuilder.createConstantValueExpression(
+          Init.getFloat().bitcastToAPInt().getZExtValue());
+  }
   GV.reset(DBuilder.createGlobalVariable(
       DContext, Name, StringRef(), Unit, getLineNumber(VD->getLocation()), Ty,
       true, InitExpr, getOrCreateStaticDataMemberDeclarationOrNull(VarD),
diff --git a/test/CodeGen/dbg-const-int128.c b/test/CodeGen/dbg-const-int128.c
new file mode 100644
index 0000000000..5fe8e04436
--- /dev/null
+++ b/test/CodeGen/dbg-const-int128.c
@@ -0,0 +1,8 @@
+// RUN: %clang_cc1 -S -emit-llvm -debug-info-kind=limited  %s -o - | FileCheck %s
+// CHECK: !DIGlobalVariable({{.*}}
+// CHECK-NOT: expr:
+
+static const __uint128_t ro = 18446744073709551615;
+
+void bar(__uint128_t);
+void foo() { bar(ro); }