From: Johan Tibell <johan.tibell@gmail.com>
Date: Wed, 27 Apr 2011 12:43:51 +0000 (+0200)
Subject: Output ELF .size directives for functions
X-Git-Url: http://git.megacz.com/?p=ghc-hetmet.git;a=commitdiff_plain;h=32f24ddfd9549010dd345733c6f46f67196cacf6

Output ELF .size directives for functions

This allows tools like Linux's perf events to display symbol names for
CMM primops.
---

diff --git a/compiler/nativeGen/X86/Ppr.hs b/compiler/nativeGen/X86/Ppr.hs
index 0f0f9d2..4c3454d 100644
--- a/compiler/nativeGen/X86/Ppr.hs
+++ b/compiler/nativeGen/X86/Ppr.hs
@@ -87,7 +87,17 @@ pprNatCmmTop (CmmProc info lbl (ListGraph blocks)) =
                       <+> 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
+#else
+pprSizeDecl _ = empty
+#endif
 
 pprBasicBlock :: NatBasicBlock Instr -> Doc
 pprBasicBlock (BasicBlock blockid instrs) =