r326366 - [Hexagon] Add -ffixed-r19 driver option and translate it to +reserved-r19

[Krzysztof Parzyszek via cfe-commits]

Author: kparzysz
Date: Wed Feb 28 12:31:55 2018
New Revision: 326366

URL: http://llvm.org/viewvc/llvm-project?rev=326366&view=rev
Log:
[Hexagon] Add -ffixed-r19 driver option and translate it to +reserved-r19

Modified:
    cfe/trunk/include/clang/Driver/Options.td
    cfe/trunk/lib/Driver/ToolChains/Hexagon.cpp
    cfe/trunk/test/Driver/hexagon-toolchain-elf.c

Modified: cfe/trunk/include/clang/Driver/Options.td
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/include/clang/Driver/Options.td?rev=326366&r1=326365&r2=326366&view=diff
==============================================================================
--- cfe/trunk/include/clang/Driver/Options.td (original)
+++ cfe/trunk/include/clang/Driver/Options.td Wed Feb 28 12:31:55 2018
@@ -2496,6 +2496,8 @@ def mno_hexagon_hvx_double
     : Flag<[ "-" ], "mno-hvx-double">,
       Group<m_hexagon_Features_HVX_Group>,
       HelpText<"Disable Hexagon Double Vector eXtensions">;
+def ffixed_r19: Flag<["-"], "ffixed-r19">,
+  HelpText<"Reserve the r19 register (Hexagon only)">;
 
 
 // X86 feature flags

Modified: cfe/trunk/lib/Driver/ToolChains/Hexagon.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/Driver/ToolChains/Hexagon.cpp?rev=326366&r1=326365&r2=326366&view=diff
==============================================================================
--- cfe/trunk/lib/Driver/ToolChains/Hexagon.cpp (original)
+++ cfe/trunk/lib/Driver/ToolChains/Hexagon.cpp Wed Feb 28 12:31:55 2018
@@ -521,11 +521,15 @@ unsigned HexagonToolChain::getOptimizati
 void HexagonToolChain::addClangTargetOptions(const ArgList &DriverArgs,
                                              ArgStringList &CC1Args,
                                              Action::OffloadKind) const {
-  if (DriverArgs.hasArg(options::OPT_ffp_contract))
-    return;
-  unsigned OptLevel = getOptimizationLevel(DriverArgs);
-  if (OptLevel >= 3)
-    CC1Args.push_back("-ffp-contract=fast");
+  if (!DriverArgs.hasArg(options::OPT_ffp_contract)) {
+    unsigned OptLevel = getOptimizationLevel(DriverArgs);
+    if (OptLevel >= 3)
+      CC1Args.push_back("-ffp-contract=fast");
+  }
+  if (DriverArgs.hasArg(options::OPT_ffixed_r19)) {
+    CC1Args.push_back("-target-feature");
+    CC1Args.push_back("+reserved-r19");
+  }
 }
 
 void HexagonToolChain::AddClangSystemIncludeArgs(const ArgList &DriverArgs,

Modified: cfe/trunk/test/Driver/hexagon-toolchain-elf.c
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/Driver/hexagon-toolchain-elf.c?rev=326366&r1=326365&r2=326366&view=diff
==============================================================================
--- cfe/trunk/test/Driver/hexagon-toolchain-elf.c (original)
+++ cfe/trunk/test/Driver/hexagon-toolchain-elf.c Wed Feb 28 12:31:55 2018
@@ -504,12 +504,22 @@
 // CHECK060-NEXT: hexagon-link
 
 // -----------------------------------------------------------------------------
+// ffixed-r19
+// -----------------------------------------------------------------------------
+// RUN: %clang -### -target hexagon-unknown-elf -ffixed-r19 %s 2>&1 \
+// RUN:        | FileCheck --check-prefix=CHECK070 %s
+// CHECK070: "-target-feature" "+reserved-r19"
+// RUN: %clang -### -target hexagon-unknown-elf %s 2>&1 \
+// RUN:        | FileCheck --check-prefix=CHECK071 %s
+// CHECK071-NOT: "+reserved-r19"
+
+// -----------------------------------------------------------------------------
 // Misc Defaults
 // -----------------------------------------------------------------------------
 // RUN: %clang -### -target hexagon-unknown-elf \
 // RUN:   -ccc-install-dir %S/Inputs/hexagon_tree/Tools/bin \
 // RUN:   -mcpu=hexagonv60 \
 // RUN:   %s 2>&1 \
-// RUN:   | FileCheck -check-prefix=CHECK070 %s
-// CHECK070:      "-cc1"
-// CHECK070:      "-Wreturn-type"
+// RUN:   | FileCheck -check-prefix=CHECK080 %s
+// CHECK080:      "-cc1"
+// CHECK080:      "-Wreturn-type"