llvm-mc: Improve handling of implicit alignment for magic section directives
(e.g., .objc_message_refs).
- Just emit a .align when we see the directive; this isn't exactly what 'as'
does but in practice it should be ok, at least for now. See FIXME.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@79697 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/tools/llvm-mc/AsmParser.cpp b/tools/llvm-mc/AsmParser.cpp
index 9db0ac0..1978121 100644
--- a/tools/llvm-mc/AsmParser.cpp
+++ b/tools/llvm-mc/AsmParser.cpp
@@ -794,13 +794,24 @@
// FIXME: Arch specific.
// FIXME: Cache this!
- // FIXME: Handle the implicit alignment!!
MCSection *S = 0; // Ctx.GetSection(Section);
if (S == 0)
S = MCSectionMachO::Create(Segment, Section, TAA, StubSize,
SectionKind(), Ctx);
Out.SwitchSection(S);
+
+ // Set the implicit alignment, if any.
+ //
+ // FIXME: This isn't really what 'as' does; I think it just uses the implicit
+ // alignment on the section (e.g., if one manually inserts bytes into the
+ // section, then just issueing the section switch directive will not realign
+ // the section. However, this is arguably more reasonable behavior, and there
+ // is no good reason for someone to intentionally emit incorrectly sized
+ // values into the implicitly aligned sections.
+ if (Align)
+ Out.EmitValueToAlignment(Align, 0, 1, 0);
+
return false;
}