Remove the assignment of what's a default value

Also check for p2align not having any trailing operands

Author: jmorse

llvm/lib/Target/X86/MCTargetDesc/X86MCAsmInfo.cpp

@@ -43,9 +43,6 @@ X86MCAsmInfoDarwin::X86MCAsmInfoDarwin(const Triple &T) {
 
   AssemblerDialect = AsmWriterFlavor;
 
-  // This will be padded with appropriately sized nops.
-  TextAlignFillValue = 0;
-
   if (!is64Bit)
     Data64bitsDirective = nullptr;       // we can't emit a 64-bit unit
 
@@ -94,9 +91,6 @@ X86ELFMCAsmInfo::X86ELFMCAsmInfo(const Triple &T) {
 
   AssemblerDialect = AsmWriterFlavor;
 
-  // This will be padded with appropriately sized nops.
-  TextAlignFillValue = 0;
-
   // Debug Information
   SupportsDebugInformation = true;
 
@@ -134,9 +128,6 @@ X86MCAsmInfoMicrosoft::X86MCAsmInfoMicrosoft(const Triple &Triple) {
 
   AssemblerDialect = AsmWriterFlavor;
 
-  // This will be padded with appropriately sized nops.
-  TextAlignFillValue = 0;
-
   AllowAtInName = true;
 }
 
@@ -170,8 +161,5 @@ X86MCAsmInfoGNUCOFF::X86MCAsmInfoGNUCOFF(const Triple &Triple) {
 
   AssemblerDialect = AsmWriterFlavor;
 
-  // This will be padded with appropriately sized nops.
-  TextAlignFillValue = 0;
-
   AllowAtInName = true;
 }

llvm/test/CodeGen/X86/same-align-bytes-with-llasm-llobj.ll

@@ -7,7 +7,7 @@
 ; ASM:        # %bb.0:
 ; ASM-NEXT:   pushq   %rax
 ; ASM-NEXT:   .cfi_def_cfa_offset 16
-; ASM-NEXT:   .p2align        4
+; ASM-NEXT:   .p2align 4{{$}}
 
 ;; When we assemble the file, either using the built-in asssembler or going
 ;; via a textual assembly file, we should get the same padding between the