r361355 - [PPC64] Parse -elfv1 -elfv2 when specified on target triple

[Fangrui Song via cfe-commits]

Author: maskray
Date: Wed May 22 00:29:59 2019
New Revision: 361355

URL: http://llvm.org/viewvc/llvm-project?rev=361355&view=rev
Log:
[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

Modified:
    cfe/trunk/lib/Basic/Targets/PPC.h

Modified: cfe/trunk/lib/Basic/Targets/PPC.h
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets/PPC.h?rev=361355&r1=361354&r2=361355&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/Targets/PPC.h (original)
+++ cfe/trunk/lib/Basic/Targets/PPC.h Wed May 22 00:29:59 2019
@@ -379,13 +379,11 @@ public:
 
     if ((Triple.getArch() == llvm::Triple::ppc64le)) {
       resetDataLayout("e-m:e-i64:64-n32:64");
-      ABI = "elfv2";
     } else {
       resetDataLayout("E-m:e-i64:64-n32:64");
-      ABI = "elfv1";
     }
 
-    switch (getTriple().getOS()) {
+    switch (Triple.getOS()) {
     case llvm::Triple::FreeBSD:
       LongDoubleWidth = LongDoubleAlign = 64;
       LongDoubleFormat = &llvm::APFloat::IEEEdouble();