r324170 - [RISCV] Create a LinuxTargetInfo when targeting Linux

[Alex Bradbury via cfe-commits]

Author: asb
Date: Sat Feb  3 03:56:11 2018
New Revision: 324170

URL: http://llvm.org/viewvc/llvm-project?rev=324170&view=rev
Log:
[RISCV] Create a LinuxTargetInfo when targeting Linux

Previously, RISCV32TargetInfo or RISCV64TargetInfo were created 
unconditionally. Use LinuxTargetInfo<RISCV??TargetInfo> to ensure that the 
proper OS-specific defines are present.

This patch only adds logic to instantiate LinuxTargetInfo and leaves a TODO, 
as I'm reluctant to add logic for other targets (e.g. FreeBSD, RTEMS) until 
I've produced and tested at least one binary for that OS+target combo.

Thanks to @mgrang to reporting the issue.

Modified:
    cfe/trunk/lib/Basic/Targets.cpp
    cfe/trunk/test/Preprocessor/init.c

Modified: cfe/trunk/lib/Basic/Targets.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets.cpp?rev=324170&r1=324169&r2=324170&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/Targets.cpp (original)
+++ cfe/trunk/lib/Basic/Targets.cpp Sat Feb  3 03:56:11 2018
@@ -372,8 +372,14 @@ TargetInfo *AllocateTarget(const llvm::T
     return new AMDGPUTargetInfo(Triple, Opts);
 
   case llvm::Triple::riscv32:
+    // TODO: add cases for FreeBSD, NetBSD, RTEMS once tested.
+    if (os == llvm::Triple::Linux)
+      return new LinuxTargetInfo<RISCV32TargetInfo>(Triple, Opts);
     return new RISCV32TargetInfo(Triple, Opts);
   case llvm::Triple::riscv64:
+    // TODO: add cases for FreeBSD, NetBSD, RTEMS once tested.
+    if (os == llvm::Triple::Linux)
+      return new LinuxTargetInfo<RISCV64TargetInfo>(Triple, Opts);
     return new RISCV64TargetInfo(Triple, Opts);
 
   case llvm::Triple::sparc:

Modified: cfe/trunk/test/Preprocessor/init.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Preprocessor/init.c?rev=324170&r1=324169&r2=324170&view=diff
==============================================================================
--- cfe/trunk/test/Preprocessor/init.c (original)
+++ cfe/trunk/test/Preprocessor/init.c Sat Feb  3 03:56:11 2018
@@ -10005,6 +10005,8 @@
 
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=riscv32 < /dev/null \
 // RUN:   | FileCheck -match-full-lines -check-prefix=RISCV32 %s
+// RUN: %clang_cc1 -E -dM -ffreestanding -triple=riscv32-unknown-linux < /dev/null \
+// RUN:   | FileCheck -match-full-lines -check-prefixes=RISCV32,RISCV32-LINUX %s
 // RISCV32: #define _ILP32 1
 // RISCV32: #define __ATOMIC_ACQUIRE 2
 // RISCV32: #define __ATOMIC_ACQ_REL 4
@@ -10196,13 +10198,22 @@
 // RISCV32: #define __WINT_TYPE__ unsigned int
 // RISCV32: #define __WINT_UNSIGNED__ 1
 // RISCV32: #define __WINT_WIDTH__ 32
+// RISCV32-LINUX: #define __gnu_linux__ 1
+// RISCV32-LINUX: #define __linux 1
+// RISCV32-LINUX: #define __linux__ 1
 // RISCV32: #define __riscv 1
 // RISCV32: #define __riscv_cmodel_medlow 1
 // RISCV32: #define __riscv_float_abi_soft 1
 // RISCV32: #define __riscv_xlen 32
+// RISCV32-LINUX: #define __unix 1
+// RISCV32-LINUX: #define __unix__ 1
+// RISCV32-LINUX: #define linux 1
+// RISCV32-LINUX: #define unix 1
 
 // RUN: %clang_cc1 -E -dM -ffreestanding -triple=riscv64 < /dev/null \
 // RUN:   | FileCheck -match-full-lines -check-prefix=RISCV64 %s
+// RUN: %clang_cc1 -E -dM -ffreestanding -triple=riscv64-unknown-linux < /dev/null \
+// RUN:   | FileCheck -match-full-lines -check-prefixes=RISCV64,RISCV64-LINUX %s
 // RISCV64: #define _LP64 1
 // RISCV64: #define __ATOMIC_ACQUIRE 2
 // RISCV64: #define __ATOMIC_ACQ_REL 4
@@ -10394,7 +10405,14 @@
 // RISCV64: #define __WINT_TYPE__ unsigned int
 // RISCV64: #define __WINT_UNSIGNED__ 1
 // RISCV64: #define __WINT_WIDTH__ 32
+// RISCV64-LINUX: #define __gnu_linux__ 1
+// RISCV64-LINUX: #define __linux 1
+// RISCV64-LINUX: #define __linux__ 1
 // RISCV64: #define __riscv 1
 // RISCV64: #define __riscv_cmodel_medlow 1
 // RISCV64: #define __riscv_float_abi_soft 1
 // RISCV64: #define __riscv_xlen 64
+// RISCV64-LINUX: #define __unix 1
+// RISCV64-LINUX: #define __unix__ 1
+// RISCV64-LINUX: #define linux 1
+// RISCV64-LINUX: #define unix 1