r181750 - Use atomic instructions on linux thumb v7.
Rafael Espindola
rafael.espindola at gmail.com
Mon May 13 17:44:24 PDT 2013
Author: rafael
Date: Mon May 13 19:44:24 2013
New Revision: 181750
URL: http://llvm.org/viewvc/llvm-project?rev=181750&view=rev
Log:
Use atomic instructions on linux thumb v7.
This matches gcc's behaviour. The patch also explicitly parses the version so
that this keeps working when we add support for v8.
Modified:
cfe/trunk/lib/Basic/Targets.cpp
cfe/trunk/test/CodeGen/linux-arm-atomic.c
Modified: cfe/trunk/lib/Basic/Targets.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Basic/Targets.cpp?rev=181750&r1=181749&r2=181750&view=diff
==============================================================================
--- cfe/trunk/lib/Basic/Targets.cpp (original)
+++ cfe/trunk/lib/Basic/Targets.cpp Mon May 13 19:44:24 2013
@@ -3536,9 +3536,23 @@ class ARMTargetInfo : public TargetInfo
if (T.getOS() != llvm::Triple::Linux)
return false;
StringRef ArchName = T.getArchName();
- if (ArchName.startswith("armv6") || ArchName.startswith("armv7"))
- return true;
- return false;
+ if (T.getArch() == llvm::Triple::arm) {
+ if (!ArchName.startswith("armv"))
+ return false;
+ StringRef VersionStr = ArchName.substr(4);
+ unsigned Version;
+ if (VersionStr.getAsInteger(10, Version))
+ return false;
+ return Version >= 6;
+ }
+ assert(T.getArch() == llvm::Triple::thumb);
+ if (!ArchName.startswith("thumbv"))
+ return false;
+ StringRef VersionStr = ArchName.substr(6);
+ unsigned Version;
+ if (VersionStr.getAsInteger(10, Version))
+ return false;
+ return Version >= 7;
}
public:
Modified: cfe/trunk/test/CodeGen/linux-arm-atomic.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGen/linux-arm-atomic.c?rev=181750&r1=181749&r2=181750&view=diff
==============================================================================
--- cfe/trunk/test/CodeGen/linux-arm-atomic.c (original)
+++ cfe/trunk/test/CodeGen/linux-arm-atomic.c Mon May 13 19:44:24 2013
@@ -1,5 +1,6 @@
// RUN: %clang_cc1 %s -emit-llvm -o - -triple=armv7-unknown-linux | FileCheck %s
// RUN: %clang_cc1 %s -emit-llvm -o - -triple=armv6-unknown-linux | FileCheck %s
+// RUN: %clang_cc1 %s -emit-llvm -o - -triple=thumbv7-unknown-linux | FileCheck %s
typedef int _Atomic_word;
_Atomic_word exchange_and_add(volatile _Atomic_word *__mem, int __val) {
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