Record the alignment of the output sections.

llvm-svn: 244941
diff --git a/lld/ELF/Writer.cpp b/lld/ELF/Writer.cpp
index 7994d0c..8f167ad 100644
--- a/lld/ELF/Writer.cpp
+++ b/lld/ELF/Writer.cpp
@@ -120,8 +120,12 @@
 
 template <bool Is64Bits> void OutputSection<Is64Bits>::addChunk(Chunk *C) {
   Chunks.push_back(C);
+  uint32_t Align = C->getAlign();
+  if (Align > Header.sh_addralign)
+    Header.sh_addralign = Align;
+
   uintX_t Off = Header.sh_size;
-  Off = RoundUpToAlignment(Off, C->getAlign());
+  Off = RoundUpToAlignment(Off, Align);
   C->setOutputSectionOff(Off);
   Off += C->getSize();
   Header.sh_size = Off;
diff --git a/lld/test/elf2/basic.s b/lld/test/elf2/basic.s
index 9eba0b1..224fbb9 100644
--- a/lld/test/elf2/basic.s
+++ b/lld/test/elf2/basic.s
@@ -63,7 +63,7 @@
 # CHECK-NEXT:     Size: 16
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -79,7 +79,7 @@
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -95,7 +95,7 @@
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
diff --git a/lld/test/elf2/basic32.s b/lld/test/elf2/basic32.s
index 6b85980..a0b7bd9 100644
--- a/lld/test/elf2/basic32.s
+++ b/lld/test/elf2/basic32.s
@@ -63,7 +63,7 @@
 # CHECK-NEXT:     Size: 12
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -79,7 +79,7 @@
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -95,7 +95,7 @@
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
diff --git a/lld/test/elf2/basic32be.s b/lld/test/elf2/basic32be.s
index 0b48620..77423a3 100644
--- a/lld/test/elf2/basic32be.s
+++ b/lld/test/elf2/basic32be.s
@@ -63,7 +63,7 @@
 # CHECK-NEXT:     Size: 12
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -79,7 +79,7 @@
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -95,7 +95,7 @@
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
diff --git a/lld/test/elf2/basic64be.s b/lld/test/elf2/basic64be.s
index f6e8916..dd0cf72 100644
--- a/lld/test/elf2/basic64be.s
+++ b/lld/test/elf2/basic64be.s
@@ -68,7 +68,7 @@
 # CHECK-NEXT:     Size: 12
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -84,7 +84,7 @@
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -100,7 +100,7 @@
 # CHECK-NEXT:     Size: 0
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 4
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {
@@ -116,7 +116,7 @@
 # CHECK-NEXT:     Size: 24
 # CHECK-NEXT:     Link: 0
 # CHECK-NEXT:     Info: 0
-# CHECK-NEXT:     AddressAlignment: 0
+# CHECK-NEXT:     AddressAlignment: 1
 # CHECK-NEXT:     EntrySize: 0
 # CHECK-NEXT:   }
 # CHECK-NEXT:   Section {