xref: /freebsd-10.2-release/contrib/llvm/patches/patch-r262261-llvm-r200282-sparc.diff

Pull in r200282 from upstream llvm trunk (by Jakob Stoklund Olesen):

  Fix the DWARF EH encodings for Sparc PIC code.

  Also emit the stubs that were generated for references to typeinfo
  symbols.

Introduced here: http://svnweb.freebsd.org/changeset/base/262261

Index: lib/Target/Sparc/SparcAsmPrinter.cpp
===================================================================
--- lib/Target/Sparc/SparcAsmPrinter.cpp
+++ lib/Target/Sparc/SparcAsmPrinter.cpp
@@ -23,7 +23,9 @@
 #include "llvm/ADT/SmallString.h"
 #include "llvm/CodeGen/AsmPrinter.h"
 #include "llvm/CodeGen/MachineInstr.h"
+#include "llvm/CodeGen/MachineModuleInfoImpls.h"
 #include "llvm/CodeGen/MachineRegisterInfo.h"
+#include "llvm/CodeGen/TargetLoweringObjectFileImpl.h"
 #include "llvm/MC/MCAsmInfo.h"
 #include "llvm/MC/MCContext.h"
 #include "llvm/MC/MCInst.h"
@@ -54,6 +56,7 @@ namespace {
 
     virtual void EmitFunctionBodyStart();
     virtual void EmitInstruction(const MachineInstr *MI);
+    virtual void EmitEndOfAsmFile(Module &M);
 
     static const char *getRegisterName(unsigned RegNo) {
       return SparcInstPrinter::getRegisterName(RegNo);
@@ -450,6 +453,23 @@ bool SparcAsmPrinter::PrintAsmMemoryOperand(const
   return false;
 }
 
+void SparcAsmPrinter::EmitEndOfAsmFile(Module &M) {
+  const TargetLoweringObjectFileELF &TLOFELF =
+    static_cast<const TargetLoweringObjectFileELF &>(getObjFileLowering());
+  MachineModuleInfoELF &MMIELF = MMI->getObjFileInfo<MachineModuleInfoELF>();
+
+  // Generate stubs for global variables.
+  MachineModuleInfoELF::SymbolListTy Stubs = MMIELF.GetGVStubList();
+  if (!Stubs.empty()) {
+    OutStreamer.SwitchSection(TLOFELF.getDataSection());
+    unsigned PtrSize = TM.getDataLayout()->getPointerSize(0);
+    for (unsigned i = 0, e = Stubs.size(); i != e; ++i) {
+      OutStreamer.EmitLabel(Stubs[i].first);
+      OutStreamer.EmitSymbolValue(Stubs[i].second.getPointer(), PtrSize);
+    }
+  }
+}
+
 // Force static initialization.
 extern "C" void LLVMInitializeSparcAsmPrinter() {
   RegisterAsmPrinter<SparcAsmPrinter> X(TheSparcTarget);
Index: lib/MC/MCObjectFileInfo.cpp
===================================================================
--- lib/MC/MCObjectFileInfo.cpp
+++ lib/MC/MCObjectFileInfo.cpp
@@ -310,6 +310,33 @@ void MCObjectFileInfo::InitELFMCObjectFileInfo(Tri
     FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_udata8;
     TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
       dwarf::DW_EH_PE_udata8;
+  } else if (T.getArch() == Triple::sparc) {
+    if (RelocM == Reloc::PIC_) {
+      LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+      PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+        dwarf::DW_EH_PE_sdata4;
+      FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+      TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+        dwarf::DW_EH_PE_sdata4;
+    } else {
+      LSDAEncoding = dwarf::DW_EH_PE_absptr;
+      PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+      FDEEncoding = dwarf::DW_EH_PE_udata4;
+      TTypeEncoding = dwarf::DW_EH_PE_absptr;
+    }
+  } else if (T.getArch() == Triple::sparcv9) {
+    LSDAEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+    if (RelocM == Reloc::PIC_) {
+      PersonalityEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+        dwarf::DW_EH_PE_sdata4;
+      FDEEncoding = dwarf::DW_EH_PE_pcrel | dwarf::DW_EH_PE_sdata4;
+      TTypeEncoding = dwarf::DW_EH_PE_indirect | dwarf::DW_EH_PE_pcrel |
+        dwarf::DW_EH_PE_sdata4;
+    } else {
+      PersonalityEncoding = dwarf::DW_EH_PE_absptr;
+      FDEEncoding = dwarf::DW_EH_PE_udata4;
+      TTypeEncoding = dwarf::DW_EH_PE_absptr;
+    }
   } else if (T.getArch() == Triple::systemz) {
     // All currently-defined code models guarantee that 4-byte PC-relative
     // values will be in range.
Index: test/CodeGen/SPARC/exception.ll
===================================================================
--- test/CodeGen/SPARC/exception.ll
+++ test/CodeGen/SPARC/exception.ll
@@ -1,4 +1,7 @@
-; RUN: llc < %s -march=sparc | FileCheck %s
+; RUN: llc < %s -march=sparc   -relocation-model=static | FileCheck -check-prefix=V8ABS %s
+; RUN: llc < %s -march=sparc   -relocation-model=pic    | FileCheck -check-prefix=V8PIC %s
+; RUN: llc < %s -march=sparcv9 -relocation-model=static | FileCheck -check-prefix=V9ABS %s
+; RUN: llc < %s -march=sparcv9 -relocation-model=pic    | FileCheck -check-prefix=V9PIC %s
 
 
 %struct.__fundamental_type_info_pseudo = type { %struct.__type_info_pseudo }
@@ -9,23 +12,64 @@
 @.cst = linker_private unnamed_addr constant [12 x i8] c"catched int\00", align 64
 @.cst1 = linker_private unnamed_addr constant [14 x i8] c"catched float\00", align 64
 
-; CHECK-LABEL: main:
-; CHECK:       .cfi_startproc
-; CHECK:       .cfi_def_cfa_register {{30|%fp}}
-; CHECK:       .cfi_window_save
-; CHECK:       .cfi_register 15, 31
+; V8ABS-LABEL: main:
+; V8ABS:        .cfi_startproc
+; V8ABS:        .cfi_personality 0, __gxx_personality_v0
+; V8ABS:        .cfi_lsda 0,
+; V8ABS:        .cfi_def_cfa_register {{30|%fp}}
+; V8ABS:        .cfi_window_save
+; V8ABS:        .cfi_register 15, 31
 
-; CHECK:        call __cxa_throw
-; CHECK:        call __cxa_throw
+; V8ABS:        call __cxa_throw
+; V8ABS:        call __cxa_throw
 
-; CHECK:        call __cxa_begin_catch
-; CHECK:        call __cxa_end_catch
+; V8ABS:        call __cxa_begin_catch
+; V8ABS:        call __cxa_end_catch
 
-; CHECK:        call __cxa_begin_catch
-; CHECK:        call __cxa_end_catch
+; V8ABS:        call __cxa_begin_catch
+; V8ABS:        call __cxa_end_catch
 
-; CHECK:        .cfi_endproc
+; V8ABS:        .cfi_endproc
 
+; V8PIC-LABEL: main:
+; V8PIC:        .cfi_startproc
+; V8PIC:        .cfi_personality 155, DW.ref.__gxx_personality_v0
+; V8PIC:        .cfi_lsda 27,
+; V8PIC:        .cfi_def_cfa_register {{30|%fp}}
+; V8PIC:        .cfi_window_save
+; V8PIC:        .cfi_register 15, 31
+; V8PIC:        .section .gcc_except_table
+; V8PIC-NOT:    .section
+; V8PIC:        .word .L_ZTIi.DW.stub-
+; V8PIC:        .data
+; V8PIC: .L_ZTIi.DW.stub:
+; V8PIC-NEXT:   .word _ZTIi
+
+; V9ABS-LABEL: main:
+; V9ABS:        .cfi_startproc
+; V9ABS:        .cfi_personality 0, __gxx_personality_v0
+; V9ABS:        .cfi_lsda 27,
+; V9ABS:        .cfi_def_cfa_register {{30|%fp}}
+; V9ABS:        .cfi_window_save
+; V9ABS:        .cfi_register 15, 31
+; V9ABS:        .section .gcc_except_table
+; V9ABS-NOT:    .section
+; V9ABS:        .xword _ZTIi
+
+; V9PIC-LABEL: main:
+; V9PIC:        .cfi_startproc
+; V9PIC:        .cfi_personality 155, DW.ref.__gxx_personality_v0
+; V9PIC:        .cfi_lsda 27,
+; V9PIC:        .cfi_def_cfa_register {{30|%fp}}
+; V9PIC:        .cfi_window_save
+; V9PIC:        .cfi_register 15, 31
+; V9PIC:        .section .gcc_except_table
+; V9PIC-NOT:    .section
+; V9PIC:        .word .L_ZTIi.DW.stub-
+; V9PIC:        .data
+; V9PIC: .L_ZTIi.DW.stub:
+; V9PIC-NEXT:   .xword _ZTIi
+
 define i32 @main(i32 %argc, i8** nocapture readnone %argv) unnamed_addr #0 {
 entry:
   %0 = icmp eq i32 %argc, 2