Emit .comm alignment in bytes but .align in powers of 2 for ARM ELF.

Original patch by Sandeep Patel and updated by me.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@94582 91177308-0d34-0410-b5e6-96231b3b80d8

5 files changed, 7 insertions, 2 deletions

diff --git a/lib/MC/MCAsmInfo.cpp b/lib/MC/MCAsmInfo.cpp
index 4a86e1df89..12d2fcbadc 100644
--- a/lib/MC/MCAsmInfo.cpp
+++ b/lib/MC/MCAsmInfo.cpp
@@ -51,6 +51,7 @@ MCAsmInfo::MCAsmInfo() {
   GlobalDirective = "\t.globl\t";
   SetDirective = 0;
   HasLCOMMDirective = false;
+  COMMDirectiveAlignmentIsInBytes = true;
   HasDotTypeDotSizeDirective = true;
   HasSingleParameterDotFile = true;
   HasNoDeadStrip = false;
diff --git a/lib/MC/MCAsmInfoCOFF.cpp b/lib/MC/MCAsmInfoCOFF.cpp
index e6b79dd9d1..ab8a585480 100644
--- a/lib/MC/MCAsmInfoCOFF.cpp
+++ b/lib/MC/MCAsmInfoCOFF.cpp
@@ -18,6 +18,7 @@ using namespace llvm;
 
 MCAsmInfoCOFF::MCAsmInfoCOFF() {
   GlobalPrefix = "_";
+  COMMDirectiveAlignmentIsInBytes = false;
   HasLCOMMDirective = true;
   HasDotTypeDotSizeDirective = false;
   HasSingleParameterDotFile = false;
@@ -36,4 +37,3 @@ MCAsmInfoCOFF::MCAsmInfoCOFF() {
   SupportsDebugInformation = true;
   DwarfSectionOffsetDirective = "\t.secrel32\t";
 }
-
diff --git a/lib/MC/MCAsmInfoDarwin.cpp b/lib/MC/MCAsmInfoDarwin.cpp
index 2cf982f393..e84131f599 100644
--- a/lib/MC/MCAsmInfoDarwin.cpp
+++ b/lib/MC/MCAsmInfoDarwin.cpp
@@ -26,6 +26,7 @@ MCAsmInfoDarwin::MCAsmInfoDarwin() {
   HasSubsectionsViaSymbols = true;
 
   AlignmentIsInBytes = false;
+  COMMDirectiveAlignmentIsInBytes = false;
   InlineAsmStart = " InlineAsm Start";
   InlineAsmEnd = " InlineAsm End";
 
diff --git a/lib/MC/MCAsmStreamer.cpp b/lib/MC/MCAsmStreamer.cpp
index d177f9525a..b544d04f14 100644
--- a/lib/MC/MCAsmStreamer.cpp
+++ b/lib/MC/MCAsmStreamer.cpp
@@ -282,7 +282,7 @@ void MCAsmStreamer::EmitCommonSymbol(MCSymbol *Symbol, uint64_t Size,
                                      unsigned ByteAlignment) {
   OS << "\t.comm\t" << *Symbol << ',' << Size;
   if (ByteAlignment != 0) {
-    if (MAI.getAlignmentIsInBytes())
+    if (MAI.getCOMMDirectiveAlignmentIsInBytes())
       OS << ',' << ByteAlignment;
     else
       OS << ',' << Log2_32(ByteAlignment);
diff --git a/lib/Target/ARM/ARMMCAsmInfo.cpp b/lib/Target/ARM/ARMMCAsmInfo.cpp
index cc59ec8ce8..911a71fbdd 100644
--- a/lib/Target/ARM/ARMMCAsmInfo.cpp
+++ b/lib/Target/ARM/ARMMCAsmInfo.cpp
@@ -52,6 +52,9 @@ ARMMCAsmInfoDarwin::ARMMCAsmInfoDarwin() {
 }
 
 ARMELFMCAsmInfo::ARMELFMCAsmInfo() {
+  // ".comm align is in bytes but .align is pow-2."
+  AlignmentIsInBytes = false;
+
   Data64bitsDirective = 0;
   CommentString = "@";