From: Ulrich Weigand <ulrich.weigand@de.ibm.com>
Date: Wed, 28 Nov 2012 18:21:03 +0000 (+0000)
Subject: Fix initial frame state on powerpc64.
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=781dfbd482c5177215ae7a43c9483e641eeb0d47;p=oota-llvm.git

Fix initial frame state on powerpc64.

The createPPCMCAsmInfo routine used PPC::R1 as the initial frame
pointer register, but on PPC64 the 32-bit R1 register does not
have a corresponding DWARF number, causing invalid CIE initial
frame state to be emitted.  Fix by using PPC::X1 instead.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@168799 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp b/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
index 29faca34000..4d914aa1106 100644
--- a/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
+++ b/lib/Target/PowerPC/MCTargetDesc/PPCMCTargetDesc.cpp
@@ -70,7 +70,7 @@ static MCAsmInfo *createPPCMCAsmInfo(const Target &T, StringRef TT) {
 
   // Initial state of the frame pointer is R1.
   MachineLocation Dst(MachineLocation::VirtualFP);
-  MachineLocation Src(PPC::R1, 0);
+  MachineLocation Src(isPPC64? PPC::X1 : PPC::R1, 0);
   MAI->addInitialFrameState(0, Dst, Src);
 
   return MAI;
diff --git a/test/MC/PowerPC/ppc64-initial-cfa.ll b/test/MC/PowerPC/ppc64-initial-cfa.ll
new file mode 100644
index 00000000000..3936cf2e81e
--- /dev/null
+++ b/test/MC/PowerPC/ppc64-initial-cfa.ll
@@ -0,0 +1,41 @@
+;; RUN: llc -mtriple=powerpc64-unknown-linux-gnu -filetype=obj %s -o - | \
+;; RUN: elf-dump --dump-section-data | FileCheck %s
+
+;; FIXME: this file should be in .s form, change when asm parser is available.
+
+define void @f() {
+entry:
+  ret void
+}
+
+;; CHECK:      ('sh_name', 0x{{.*}}) # '.eh_frame'
+;; CHECK-NEXT: ('sh_type', 0x00000001)
+;; CHECK-NEXT: ('sh_flags', 0x0000000000000002)
+;; CHECK-NEXT: ('sh_addr', 0x{{.*}})
+;; CHECK-NEXT: ('sh_offset', 0x{{.*}})
+;; CHECK-NEXT: ('sh_size', 0x0000000000000030)
+;; CHECK-NEXT: ('sh_link', 0x00000000)
+;; CHECK-NEXT: ('sh_info', 0x00000000)
+;; CHECK-NEXT: ('sh_addralign', 0x0000000000000008)
+;; CHECK-NEXT: ('sh_entsize', 0x0000000000000000)
+;; CHECK-NEXT: ('_section_data', '00000010 00000000 017a5200 01784101 000c0100 00000018 00000018 00000000 00000000 00000000 00000010 00000000')
+
+;; CHECK:      ('sh_name', 0x{{.*}}) # '.rela.eh_frame'
+;; CHECK-NEXT: ('sh_type', 0x00000004)
+;; CHECK-NEXT: ('sh_flags', 0x0000000000000000)
+;; CHECK-NEXT: ('sh_addr', 0x{{.*}})
+;; CHECK-NEXT: ('sh_offset', 0x{{.*}})
+;; CHECK-NEXT: ('sh_size', 0x0000000000000018)
+;; CHECK-NEXT: ('sh_link', 0x{{.*}})
+;; CHECK-NEXT: ('sh_info', 0x{{.*}})
+;; CHECK-NEXT: ('sh_addralign', 0x0000000000000008)
+;; CHECK-NEXT: ('sh_entsize', 0x0000000000000018)
+;; CHECK-NEXT: ('_relocations', [
+;; CHECK-NEXT:  # Relocation 0
+;; CHECK-NEXT:  (('r_offset', 0x000000000000001c)
+;; CHECK-NEXT:   ('r_sym', 0x{{.*}})
+;; CHECK-NEXT:   ('r_type', 0x00000026)
+;; CHECK-NEXT:   ('r_addend', 0x0000000000000000)
+;; CHECK-NEXT:  ),
+;; CHECK-NEXT: ])
+