[clang] 3b93dc6 - Add basic aarch64-none-elf bare metal driver.

[Kristof Beyls via cfe-commits]

Author: Kristof Beyls
Date: 2021-10-22T08:06:17+01:00
New Revision: 3b93dc6880f7ac94469e46980f1136901760d564

URL: https://github.com/llvm/llvm-project/commit/3b93dc6880f7ac94469e46980f1136901760d564
DIFF: https://github.com/llvm/llvm-project/commit/3b93dc6880f7ac94469e46980f1136901760d564.diff

LOG: Add basic aarch64-none-elf bare metal driver.

Differential Revision: https://reviews.llvm.org/D111134

Added: 
    

Modified: 
    clang/lib/Driver/ToolChains/BareMetal.cpp
    clang/test/Driver/baremetal.cpp
    clang/test/Driver/gcc_forward.c

Removed: 
    


################################################################################
diff  --git a/clang/lib/Driver/ToolChains/BareMetal.cpp b/clang/lib/Driver/ToolChains/BareMetal.cpp
index ce73e39d1456d..cd07692be3583 100644
--- a/clang/lib/Driver/ToolChains/BareMetal.cpp
+++ b/clang/lib/Driver/ToolChains/BareMetal.cpp
@@ -125,6 +125,20 @@ static bool isARMBareMetal(const llvm::Triple &Triple) {
   return true;
 }
 
+/// Is the triple aarch64-none-elf?
+static bool isAArch64BareMetal(const llvm::Triple &Triple) {
+  if (Triple.getArch() != llvm::Triple::aarch64)
+    return false;
+
+  if (Triple.getVendor() != llvm::Triple::UnknownVendor)
+    return false;
+
+  if (Triple.getOS() != llvm::Triple::UnknownOS)
+    return false;
+
+  return Triple.getEnvironmentName() == "elf";
+}
+
 static bool isRISCVBareMetal(const llvm::Triple &Triple) {
   if (Triple.getArch() != llvm::Triple::riscv32 &&
       Triple.getArch() != llvm::Triple::riscv64)
@@ -151,7 +165,8 @@ void BareMetal::findMultilibs(const Driver &D, const llvm::Triple &Triple,
 }
 
 bool BareMetal::handlesTarget(const llvm::Triple &Triple) {
-  return isARMBareMetal(Triple) || isRISCVBareMetal(Triple);
+  return isARMBareMetal(Triple) || isAArch64BareMetal(Triple) ||
+         isRISCVBareMetal(Triple);
 }
 
 Tool *BareMetal::buildLinker() const {

diff  --git a/clang/test/Driver/baremetal.cpp b/clang/test/Driver/baremetal.cpp
index fb760abbb9779..74208968f92e1 100644
--- a/clang/test/Driver/baremetal.cpp
+++ b/clang/test/Driver/baremetal.cpp
@@ -102,6 +102,16 @@
 // RUN:   | FileCheck %s --check-prefix=CHECK-SYSROOT-INC
 // CHECK-SYSROOT-INC-NOT: "-internal-isystem" "include"
 
+// RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
+// RUN:      -target aarch64-none-elf \
+// RUN:   | FileCheck --check-prefix=CHECK-AARCH64-NO-HOST-INC %s
+// Verify that the bare metal driver does not include any host system paths:
+// CHECK-AARCH64-NO-HOST-INC: InstalledDir: [[INSTALLEDDIR:.+]]
+// CHECK-AARCH64-NO-HOST-INC: "-resource-dir" "[[RESOURCE:[^"]+]]"
+// CHECK-AARCH64-NO-HOST-INC-SAME: "-internal-isystem" "[[INSTALLEDDIR]]/../lib/clang-runtimes/aarch64-none-elf/include/c++/v1"
+// CHECK-AARCH64-NO-HOST-INC-SAME: "-internal-isystem" "[[RESOURCE]]/include"
+// CHECK-AARCH64-NO-HOST-INC-SAME: "-internal-isystem" "[[INSTALLEDDIR]]/../lib/clang-runtimes/aarch64-none-elf/include"
+
 // RUN: %clang -no-canonical-prefixes %s -### -o %t.o 2>&1 \
 // RUN:     -target riscv64-unknown-elf \
 // RUN:     -L some/directory/user/asked/for \

diff  --git a/clang/test/Driver/gcc_forward.c b/clang/test/Driver/gcc_forward.c
index e6b0670d1a027..9e512d134b3e7 100644
--- a/clang/test/Driver/gcc_forward.c
+++ b/clang/test/Driver/gcc_forward.c
@@ -1,4 +1,4 @@
-// RUN: %clang -### %s -target aarch64-none-elf \
+// RUN: %clang -### %s -target x86-none-elf \
 // RUN:   --coverage -e _start -fuse-ld=lld --ld-path=ld -nostartfiles \
 // RUN:   -nostdlib -r -rdynamic -specs=nosys.specs -static -static-pie \
 // RUN:   2>&1 | FileCheck --check-prefix=FORWARD %s