r226209 - [PowerPC] Add a target option for invariant function descriptors

[Hal Finkel]

Author: hfinkel
Date: Thu Jan 15 15:22:22 2015
New Revision: 226209

URL: http://llvm.org/viewvc/llvm-project?rev=226209&view=rev
Log:
[PowerPC] Add a target option for invariant function descriptors

The PPC backend will now assume that PPC64 ELFv1 function descriptors are
invariant. This must be true for well-defined C/C++ code, but I'm providing an
option to disable this assumption in case someone's JIT-engine needs it.

Modified:
    cfe/trunk/include/clang/Driver/Options.td
    cfe/trunk/test/Driver/ppc-features.cpp

Modified: cfe/trunk/include/clang/Driver/Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=226209&r1=226208&r2=226209&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/Options.td (original)
+++ cfe/trunk/include/clang/Driver/Options.td Thu Jan 15 15:22:22 2015
@@ -1228,6 +1228,11 @@ def mqpx : Flag<["-"], "mqpx">, Group<m_
 def mno_qpx : Flag<["-"], "mno-qpx">, Group<m_ppc_Features_Group>;
 def mcrbits : Flag<["-"], "mcrbits">, Group<m_ppc_Features_Group>;
 def mno_crbits : Flag<["-"], "mno-crbits">, Group<m_ppc_Features_Group>;
+def minvariant_function_descriptors :
+  Flag<["-"], "minvariant-function-descriptors">, Group<m_ppc_Features_Group>;
+def mno_invariant_function_descriptors :
+  Flag<["-"], "mno-invariant-function-descriptors">,
+  Group<m_ppc_Features_Group>;
 
 def faltivec : Flag<["-"], "faltivec">, Group<f_Group>, Flags<[CC1Option]>,
   HelpText<"Enable AltiVec vector initializer syntax">;

Modified: cfe/trunk/test/Driver/ppc-features.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/ppc-features.cpp?rev=226209&r1=226208&r2=226209&view=diff
==============================================================================
--- cfe/trunk/test/Driver/ppc-features.cpp (original)
+++ cfe/trunk/test/Driver/ppc-features.cpp Thu Jan 15 15:22:22 2015
@@ -113,6 +113,12 @@
 // RUN: %clang -target powerpc64-unknown-linux-gnu %s -mno-crbits -mcrbits -### -o %t.o 2>&1 | FileCheck -check-prefix=CHECK-CRBITS %s
 // CHECK-CRBITS: "-target-feature" "+crbits"
 
+// RUN: %clang -target powerpc64-unknown-linux-gnu %s -mno-invariant-function-descriptors -### -o %t.o 2>&1 | FileCheck -check-prefix=CHECK-NOINVFUNCDESC %s
+// CHECK-NOINVFUNCDESC: "-target-feature" "-invariant-function-descriptors"
+
+// RUN: %clang -target powerpc64-unknown-linux-gnu %s -mno-invariant-function-descriptors -minvariant-function-descriptors -### -o %t.o 2>&1 | FileCheck -check-prefix=CHECK-INVFUNCDESC %s
+// CHECK-INVFUNCDESC: "-target-feature" "+invariant-function-descriptors"
+
 // Assembler features
 // RUN: %clang -target powerpc64-unknown-linux-gnu %s -### -o %t.o -no-integrated-as 2>&1 | FileCheck -check-prefix=CHECK_BE_AS_ARGS %s
 // CHECK_BE_AS_ARGS: "-mppc64"