From bb804ee909a0e81d39920bdc8272e624fb8da443 Mon Sep 17 00:00:00 2001 From: Oliver Stannard Date: Thu, 19 Jun 2014 15:39:33 +0000 Subject: Emit DWARF3 call frame information when DWARF3+ debug info is requested Currently, llvm always emits a DWARF CIE with a version of 1, even when emitting DWARF 3 or 4, which both support CIE version 3. This patch makes it emit the newer CIE version when we are emitting DWARF 3 or 4. This will not reduce compatibility, as we already emit other DWARF3/4 features, and is worth doing as the DWARF3 spec removed some ambiguities in the interpretation of call frame information. It also fixes a minor bug where the "return address" field of the CIE was encoded as a ULEB128, which is only valid when the CIE version is 3. There are no test changes for this, because (as far as I can tell) none of the platforms that we test have a return address register with a DWARF register number >127. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211272 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/AsmPrinter/DwarfDebug.cpp | 2 ++ 1 file changed, 2 insertions(+) (limited to 'lib/CodeGen') diff --git a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp index 7aaf731b6f..3847eb124f 100644 --- a/lib/CodeGen/AsmPrinter/DwarfDebug.cpp +++ b/lib/CodeGen/AsmPrinter/DwarfDebug.cpp @@ -209,6 +209,8 @@ DwarfDebug::DwarfDebug(AsmPrinter *A, Module *M) DwarfVersion = DwarfVersionNumber ? DwarfVersionNumber : MMI->getModule()->getDwarfVersion(); + Asm->OutStreamer.getContext().setDwarfVersion(DwarfVersion); + { NamedRegionTimer T(DbgTimerName, DWARFGroupName, TimePassesIsEnabled); beginModule(); -- cgit v1.2.3