ARM EABI divmod support

This patch enables calls to __aeabi_idivmod when in EABI mode,
by using the remainder value returned on registers (R1),
enabled by the ARM triple "none-eabi". Note that Darwin and
GNUEABI triples will continue lowering on GNU style, that is,
using the stack for the remainder.

Still need to add SREM/UREM support fix for 64-bit lowering.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186390 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 8 insertions, 0 deletions

diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h
index 63ba6c562a..ad7f1b3e34 100644
--- a/lib/Target/ARM/ARMSubtarget.h
+++ b/lib/Target/ARM/ARMSubtarget.h
@@ -280,6 +280,14 @@ public:
   bool isTargetNaCl() const { return TargetTriple.getOS() == Triple::NaCl; }
   bool isTargetLinux() const { return TargetTriple.getOS() == Triple::Linux; }
   bool isTargetELF() const { return !isTargetDarwin(); }
+  // ARM EABI is the bare-metal EABI described in ARM ABI documents and
+  // can be accessed via -target arm-none-eabi. This is NOT GNUEABI.
+  // FIXME: Add a flag for bare-metal for that target and set Triple::EABI
+  // even for GNUEABI, so we can make a distinction here and still conform to
+  // the EABI on GNU (and Android) mode. This requires change in Clang, too.
+  bool isTargetAEABI() const {
+    return TargetTriple.getEnvironment() == Triple::EABI;
+  }
 
   bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; }
   bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; }