From bf55e4b776489b1eaa82309cfcd0ecb1cfb0dade Mon Sep 17 00:00:00 2001
From: Nick Lewycky <nicholas@mxc.ca>
Date: Wed, 22 Jun 2011 18:55:03 +0000
Subject: [PATCH] Emit trailing padding on constant vectors when TargetData
 says that the vector is larger than the sum of the elements (including
 per-element padding).

llvm-svn: 133631
---
 lib/CodeGen/AsmPrinter/AsmPrinter.cpp |  7 +++++++
 test/CodeGen/ARM/constants.ll         | 13 +++++++++++++
 2 files changed, 20 insertions(+)

diff --git a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 946018cd1a4..edfb30725c5 100644
--- a/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1516,6 +1516,13 @@ static void EmitGlobalConstantVector(const ConstantVector *CV,
                                      unsigned AddrSpace, AsmPrinter &AP) {
   for (unsigned i = 0, e = CV->getType()->getNumElements(); i != e; ++i)
     EmitGlobalConstantImpl(CV->getOperand(i), AddrSpace, AP);
+
+  const TargetData &TD = *AP.TM.getTargetData();
+  unsigned Size = TD.getTypeAllocSize(CV->getType());
+  unsigned EmittedSize = TD.getTypeAllocSize(CV->getType()->getElementType()) *
+                         CV->getType()->getNumElements();
+  if (unsigned Padding = Size - EmittedSize)
+    AP.OutStreamer.EmitZeros(Padding, AddrSpace);
 }
 
 static void EmitGlobalConstantStruct(const ConstantStruct *CS,
diff --git a/test/CodeGen/ARM/constants.ll b/test/CodeGen/ARM/constants.ll
index 7893df78205..60908957ae4 100644
--- a/test/CodeGen/ARM/constants.ll
+++ b/test/CodeGen/ARM/constants.ll
@@ -44,3 +44,16 @@ define void @f7(i32 %a) {
 r:
         ret void
 }
+
+%t1 = type { <3 x float>, <3 x float> }
+
+@const1 = global %t1 { <3 x float> zeroinitializer,
+                       <3 x float> <float 1.000000e+00,
+                                    float 2.000000e+00,
+                                    float 3.000000e+00> }, align 16
+; CHECK: const1
+; CHECK: .zero 16
+; CHECK: float 1.0
+; CHECK: float 2.0
+; CHECK: float 3.0
+; CHECK: .zero 4