From: Renato Golin <renato.golin@linaro.org>
Date: Thu, 15 Aug 2013 20:45:13 +0000 (+0000)
Subject: make arm-reserve-r9 available for all ARM
X-Git-Tag: android-x86-6.0-r1~129^2~3022
X-Git-Url: http://git.osdn.net/view?a=commitdiff_plain;h=24adc8f60f0a39e45363eef5392fe1a7e27bd12f;p=android-x86%2Fexternal-llvm.git

make arm-reserve-r9 available for all ARM

r9 is defined as a platform-specific register in the ARM EABI.
It can be reserved for a special purpose or be used as a general
purpose register. Add support for reserving r9 for all ARM, while
leaving the IOS usage unchanged.

Patch by Jeroen Hofstee.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188485 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/ARM/ARMSubtarget.cpp b/lib/Target/ARM/ARMSubtarget.cpp
index c592421d9a5..a94c9425fb5 100644
--- a/lib/Target/ARM/ARMSubtarget.cpp
+++ b/lib/Target/ARM/ARMSubtarget.cpp
@@ -169,9 +169,10 @@ void ARMSubtarget::resetSubtargetFeatures(StringRef CPU, StringRef FS) {
   if (isAAPCS_ABI())
     stackAlignment = 8;
 
-  if (!isTargetIOS())
+  if (!isTargetIOS()) {
     UseMovt = hasV6T2Ops();
-  else {
+    IsR9Reserved = ReserveR9;
+  } else {
     IsR9Reserved = ReserveR9 | !HasV6Ops;
     UseMovt = DarwinUseMOVT && hasV6T2Ops();
     SupportsTailCall = !getTargetTriple().isOSVersionLT(5, 0);