r243185 - [AArch64] Pass subtarget feature "+reserve-x18" instead of passing backend
Akira Hatanaka
ahatanaka at apple.com
Fri Jul 24 17:18:01 PDT 2015
Author: ahatanak
Date: Fri Jul 24 19:18:00 2015
New Revision: 243185
URL: http://llvm.org/viewvc/llvm-project?rev=243185&view=rev
Log:
[AArch64] Pass subtarget feature "+reserve-x18" instead of passing backend
option "-aarch64-reserve-x18".
This change is needed since backend options do not make it to the backend
when doing LTO and are not capable of changing the behavior of code-gen
passes on a per-function basis.
rdar://problem/21529937
Differential Revision: http://reviews.llvm.org/D11462
Modified:
cfe/trunk/lib/Driver/Tools.cpp
Modified: cfe/trunk/lib/Driver/Tools.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/Tools.cpp?rev=243185&r1=243184&r2=243185&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/Tools.cpp (original)
+++ cfe/trunk/lib/Driver/Tools.cpp Fri Jul 24 19:18:00 2015
@@ -919,11 +919,6 @@ void Clang::AddAArch64TargetArgs(const A
else
CmdArgs.push_back("-aarch64-global-merge=true");
}
-
- if (Args.hasArg(options::OPT_ffixed_x18)) {
- CmdArgs.push_back("-backend-option");
- CmdArgs.push_back("-aarch64-reserve-x18");
- }
}
// Get CPU and ABI names. They are not independent
@@ -1971,6 +1966,9 @@ static void getAArch64TargetFeatures(con
else
Features.push_back("-crc");
}
+
+ if (Args.hasArg(options::OPT_ffixed_x18))
+ Features.push_back("+reserve-x18");
}
static void getTargetFeatures(const Driver &D, const llvm::Triple &Triple,
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