[PPC64] Parse -elfv1 -elfv2 when specified on target triple

Summary:
For big-endian powerpc64, the default ABI is ELFv1. OpenPower ABI ELFv2 is supported when -mabi=elfv2 is specified. FreeBSD support for PowerPC64 ELFv2 ABI with LLVM is in progress[1]. This patch adds an alternative way to specify ELFv2 ABI on target triple [2].

The following results are expected:

ELFv1 when using:
-target powerpc64-unknown-freebsd12.0
-target powerpc64-unknown-freebsd12.0 -mabi=elfv1
-target powerpc64-unknown-freebsd12.0-elfv1

ELFv2 when using:
-target powerpc64-unknown-freebsd12.0 -mabi=elfv2
-target powerpc64-unknown-freebsd12.0-elfv2

[1] https://wiki.freebsd.org/powerpc/llvm-elfv2
[2] https://clang.llvm.org/docs/CrossCompilation.html

Patch by Alfredo Dal'Ava Júnior!

Differential Revision: https://reviews.llvm.org/D61950

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@361355 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/include/llvm/ADT/Triple.h b/include/llvm/ADT/Triple.h
index ecbce130204df26fe1f5bb5e6a345ee5690ee9f1..5c4eaae4fb1b38780faa79bbd38844f65dc9690c 100644 (file)
--- a/include/llvm/ADT/Triple.h
+++ b/include/llvm/ADT/Triple.h
@@ -202,6 +202,8 @@ public:
     CODE16,
     EABI,
     EABIHF,
+    ELFv1,
+    ELFv2,
     Android,
     Musl,
     MuslEABI,

diff --git a/lib/Support/Triple.cpp b/lib/Support/Triple.cpp
index 639519ce6ec82f3731a8637200d24cdb5605fa9d..caf39a761d7e69dbd3b839d0fc35dceb4468c859 100644 (file)
--- a/lib/Support/Triple.cpp
+++ b/lib/Support/Triple.cpp
@@ -228,6 +228,8 @@ StringRef Triple::getEnvironmentTypeName(EnvironmentType Kind) {
   case CODE16: return "code16";
   case EABI: return "eabi";
   case EABIHF: return "eabihf";
+  case ELFv1: return "elfv1";
+  case ELFv2: return "elfv2";
   case Android: return "android";
   case Musl: return "musl";
   case MuslEABI: return "musleabi";
@@ -521,6 +523,8 @@ static Triple::EnvironmentType parseEnvironment(StringRef EnvironmentName) {
   return StringSwitch<Triple::EnvironmentType>(EnvironmentName)
     .StartsWith("eabihf", Triple::EABIHF)
     .StartsWith("eabi", Triple::EABI)
+    .StartsWith("elfv1", Triple::ELFv1)
+    .StartsWith("elfv2", Triple::ELFv2)
     .StartsWith("gnuabin32", Triple::GNUABIN32)
     .StartsWith("gnuabi64", Triple::GNUABI64)
     .StartsWith("gnueabihf", Triple::GNUEABIHF)

diff --git a/lib/Target/PowerPC/PPCTargetMachine.cpp b/lib/Target/PowerPC/PPCTargetMachine.cpp
index 35397d6143e32a63147c1161003a7c94b882a1e2..70257d851627fab1edcc6df1fc7b5cd007fd4edc 100644 (file)
--- a/lib/Target/PowerPC/PPCTargetMachine.cpp
+++ b/lib/Target/PowerPC/PPCTargetMachine.cpp
@@ -214,6 +214,8 @@ static PPCTargetMachine::PPCABI computeTargetABI(const Triple &TT,
   case Triple::ppc64le:
     return PPCTargetMachine::PPC_ABI_ELFv2;
   case Triple::ppc64:
+    if (TT.getEnvironment() == llvm::Triple::ELFv2)
+      return PPCTargetMachine::PPC_ABI_ELFv2;
     return PPCTargetMachine::PPC_ABI_ELFv1;
   default:
     return PPCTargetMachine::PPC_ABI_UNKNOWN;

diff --git a/test/CodeGen/PowerPC/ppc64-elf-abi.ll b/test/CodeGen/PowerPC/ppc64-elf-abi.ll
index 1e17930304b2dfd8ef3ba2b3a729395c43238e35..0842f357d8a1a7dfa8860f4e1915d7dc65fbb391 100644 (file)
--- a/test/CodeGen/PowerPC/ppc64-elf-abi.ll
+++ b/test/CodeGen/PowerPC/ppc64-elf-abi.ll
@@ -5,6 +5,11 @@
 ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -target-abi elfv1 < %s | FileCheck %s -check-prefix=CHECK-ELFv1
 ; RUN: llc -verify-machineinstrs -mtriple=powerpc64le-unknown-linux-gnu -target-abi elfv2 < %s | FileCheck %s -check-prefix=CHECK-ELFv2
 
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-freebsd < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-freebsd -target-abi elfv1 < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-freebsd -target-abi elfv2 < %s | FileCheck %s -check-prefix=CHECK-ELFv2
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-freebsd-elfv1  < %s | FileCheck %s -check-prefix=CHECK-ELFv1
+; RUN: llc -verify-machineinstrs -mtriple=powerpc64-unknown-freebsd-elfv2  < %s | FileCheck %s -check-prefix=CHECK-ELFv2
+
 ; CHECK-ELFv2: .abiversion 2
 ; CHECK-ELFv1-NOT: .abiversion 2
-