[llvm] [SystemZ][z/OS] Emit alignment in HLASM syntax (PR #222121)

[Kai Nacke via llvm-commits]

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@@ -310,30 +281,77 @@ void SystemZHLASMAsmStreamer::EmitComment() {
   CommentToEmit.clear();
 }
 
+void SystemZHLASMAsmStreamer::flushPendingAlignment() {
+  if (!PendingAlignSuffix)
+    return;
+  OS << " DS 0" << *PendingAlignSuffix;
+  EmitEOL();
+  PendingAlignSuffix.reset();
+}
+
 void SystemZHLASMAsmStreamer::emitValueToAlignment(Align Alignment,
                                                    int64_t Fill,
                                                    uint8_t FillLen,
                                                    unsigned MaxBytesToEmit) {
-  emitAlignmentDS(Alignment.value(), Fill, FillLen, MaxBytesToEmit);
+  unsigned int A = Log2(Alignment);
----------------
redstar wrote:

The difference is in the type. `Align` is "is a compact representation of a valid (non-zero power of two) alignment", so I can just call `Log2`. The old code used `value()`, which returns an integer, which is then passed on. 

https://github.com/llvm/llvm-project/pull/222121