+pprNatCmmTop (CmmProc info lbl (ListGraph blocks)) =
+ pprSectionHeader Text $$
+ (if null info then -- blocks guaranteed not null, so label needed
+ pprLabel lbl
+ else
+#if HAVE_SUBSECTIONS_VIA_SYMBOLS
+ pprCLabel_asm (mkDeadStripPreventer $ entryLblToInfoLbl lbl)
+ <> char ':' $$
+#endif
+ vcat (map pprData info) $$
+ pprLabel (entryLblToInfoLbl lbl)
+ ) $$
+ vcat (map pprBasicBlock blocks)
+ -- above: Even the first block gets a label, because with branch-chain
+ -- elimination, it might be the target of a goto.
+#if HAVE_SUBSECTIONS_VIA_SYMBOLS
+ -- If we are using the .subsections_via_symbols directive
+ -- (available on recent versions of Darwin),
+ -- we have to make sure that there is some kind of reference
+ -- from the entry code to a label on the _top_ of of the info table,
+ -- so that the linker will not think it is unreferenced and dead-strip
+ -- it. That's why the label is called a DeadStripPreventer (_dsp).
+ $$ if not (null info)
+ then text "\t.long "
+ <+> pprCLabel_asm (entryLblToInfoLbl lbl)
+ <+> char '-'
+ <+> pprCLabel_asm (mkDeadStripPreventer $ entryLblToInfoLbl lbl)
+ else empty
+#endif
+ $$ pprSizeDecl (if null info then lbl else entryLblToInfoLbl lbl)
+
+-- | Output the ELF .size directive.
+pprSizeDecl :: CLabel -> Doc
+#if elf_OBJ_FORMAT
+pprSizeDecl lbl =
+ ptext (sLit "\t.size") <+> pprCLabel_asm lbl
+ <> ptext (sLit ", .-") <> pprCLabel_asm lbl