diff --git a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
index 52840faf7c30..72b2f0c62afa 100644
--- a/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -308,8 +308,13 @@ void AsmPrinter::EmitGlobalVariable(const GlobalVariable *GV) {
       return;
     }
 
-    if (Align == 1 ||
-        MAI->getLCOMMDirectiveAlignmentType() != LCOMM::NoAlignment) {
+    // Use .lcomm only if it supports user-specified alignment.
+    // Otherwise, while it would still be correct to use .lcomm in some
+    // cases (e.g. when Align == 1), the external assembler might enfore
+    // some -unknown- default alignment behavior, which could cause
+    // spurious differences between external and integrated assembler.
+    // Prefer to simply fall back to .local / .comm in this case.
+    if (MAI->getLCOMMDirectiveAlignmentType() != LCOMM::NoAlignment) {
       // .lcomm _foo, 42
       OutStreamer.EmitLocalCommonSymbol(GVSym, Size, Align);
       return;
diff --git a/llvm/test/CodeGen/ARM/2010-12-15-elf-lcomm.ll b/llvm/test/CodeGen/ARM/2010-12-15-elf-lcomm.ll
index 5cfbb4f944f7..1272a257931d 100644
--- a/llvm/test/CodeGen/ARM/2010-12-15-elf-lcomm.ll
+++ b/llvm/test/CodeGen/ARM/2010-12-15-elf-lcomm.ll
@@ -10,7 +10,8 @@
 @STRIDE = internal global i32 8
 
 ; ASM:          .type   array00,%object         @ @array00
-; ASM-NEXT:     .lcomm  array00,80
+; ASM-NEXT:     .local  array00
+; ASM-NEXT:     .comm   array00,80,1
 ; ASM-NEXT:     .type   _MergedGlobals,%object  @ @_MergedGlobals
 
 
diff --git a/llvm/test/CodeGen/ARM/elf-lcomm-align.ll b/llvm/test/CodeGen/ARM/elf-lcomm-align.ll
index 46792990e593..a98b3c06f5e2 100644
--- a/llvm/test/CodeGen/ARM/elf-lcomm-align.ll
+++ b/llvm/test/CodeGen/ARM/elf-lcomm-align.ll
@@ -4,8 +4,9 @@
 @c = internal global i8 0, align 1
 @x = internal global i32 0, align 4
 
-; CHECK: .lcomm c,1
-; .lcomm doesn't support alignment.
+; .lcomm doesn't support alignment, so we always use .local/.comm.
+; CHECK: .local c
+; CHECK-NEXT: .comm c,1,1
 ; CHECK: .local x
 ; CHECK-NEXT: .comm x,4,4