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

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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
This commit is contained in:
Fangrui Song
2019-05-22 07:29:59 +00:00
parent b72aba2850
commit 41c36f8ae4
4 changed files with 14 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/llvm/ADT/Triple.h
+2
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@@ -202,6 +202,8 @@ public:
CODE16,
EABI,
EABIHF,
ELFv1,
ELFv2,
Android,
Musl,
MuslEABI,
lib/Support/Triple.cpp
+4
View File
@@ -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)
lib/Target/PowerPC/PPCTargetMachine.cpp
+2
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@@ -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;
test/CodeGen/PowerPC/ppc64-elf-abi.ll
+6 -1
View File
@@ -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