From: Vladimir Stefanovic <vladimir.stefanovic@rt-rk.com>
Date: Thu, 5 Jul 2018 13:10:23 +0000 (+0000)
Subject: [mips] Add '-mcrc', '-mno-crc' options to enable/disable CRC ASE
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=570d2b6a4e6fec720347f6a8aa0db903bcb53e6f;p=clang

[mips] Add '-mcrc', '-mno-crc' options to enable/disable CRC ASE

'-mcrc' is shared with ARM.
'-mno-crc' is Mips-only (ARM uses '-mnocrc').

Differential revision: https://reviews.llvm.org/D48169



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@336347 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/include/clang/Driver/Options.td b/include/clang/Driver/Options.td
index c228e9e9d2..496cc12aa3 100644
--- a/include/clang/Driver/Options.td
+++ b/include/clang/Driver/Options.td
@@ -1993,8 +1993,8 @@ def ffixed_r9 : Flag<["-"], "ffixed-r9">, Group<m_arm_Features_Group>,
   HelpText<"Reserve the r9 register (ARM only)">;
 def mno_movt : Flag<["-"], "mno-movt">, Group<m_arm_Features_Group>,
   HelpText<"Disallow use of movt/movw pairs (ARM only)">;
-def mcrc : Flag<["-"], "mcrc">, Group<m_arm_Features_Group>,
-  HelpText<"Allow use of CRC instructions (ARM only)">;
+def mcrc : Flag<["-"], "mcrc">, Group<m_Group>,
+  HelpText<"Allow use of CRC instructions (ARM/Mips only)">;
 def mnocrc : Flag<["-"], "mnocrc">, Group<m_arm_Features_Group>,
   HelpText<"Disallow use of CRC instructions (ARM only)">;
 def mno_neg_immediates: Flag<["-"], "mno-neg-immediates">, Group<m_arm_Features_Group>,
@@ -2212,6 +2212,8 @@ def mabicalls : Flag<["-"], "mabicalls">, Group<m_mips_Features_Group>,
   HelpText<"Enable SVR4-style position-independent code (Mips only)">;
 def mno_abicalls : Flag<["-"], "mno-abicalls">, Group<m_mips_Features_Group>,
   HelpText<"Disable SVR4-style position-independent code (Mips only)">;
+def mno_crc : Flag<["-"], "mno-crc">, Group<m_mips_Features_Group>,
+  HelpText<"Disallow use of CRC instructions (Mips only)">;
 def mips1 : Flag<["-"], "mips1">,
   Alias<march_EQ>, AliasArgs<["mips1"]>, Group<m_mips_Features_Group>,
   HelpText<"Equivalent to -march=mips1">, Flags<[HelpHidden]>;
diff --git a/lib/Driver/ToolChains/Arch/Mips.cpp b/lib/Driver/ToolChains/Arch/Mips.cpp
index 5aeb9288e7..0c0e090719 100644
--- a/lib/Driver/ToolChains/Arch/Mips.cpp
+++ b/lib/Driver/ToolChains/Arch/Mips.cpp
@@ -350,6 +350,8 @@ void mips::getMIPSTargetFeatures(const Driver &D, const llvm::Triple &Triple,
   AddTargetFeature(Args, Features, options::OPT_mno_madd4, options::OPT_mmadd4,
                    "nomadd4");
   AddTargetFeature(Args, Features, options::OPT_mmt, options::OPT_mno_mt, "mt");
+  AddTargetFeature(Args, Features, options::OPT_mcrc, options::OPT_mno_crc,
+                   "crc");
 
   if (Arg *A = Args.getLastArg(options::OPT_mindirect_jump_EQ)) {
     StringRef Val = StringRef(A->getValue());
diff --git a/test/Driver/mips-features.c b/test/Driver/mips-features.c
index 1284874b71..e90f3704f2 100644
--- a/test/Driver/mips-features.c
+++ b/test/Driver/mips-features.c
@@ -408,3 +408,15 @@
 // RUN:        -mindirect-jump=hazard 2>&1 \
 // RUN:   | FileCheck --check-prefix=INDIRECT-BH %s
 // INDIRECT-BH: "-target-feature" "+use-indirect-jump-hazard"
+//
+// -mcrc
+// RUN: %clang -target mips-unknown-linux-gnu -### -c %s \
+// RUN:     -mno-crc -mcrc 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-CRC %s
+// CHECK-CRC: "-target-feature" "+crc"
+//
+// -mno-crc
+// RUN: %clang -target mips-unknown-linux-gnu -### -c %s \
+// RUN:     -mcrc -mno-crc 2>&1 \
+// RUN:   | FileCheck --check-prefix=CHECK-NO-CRC %s
+// CHECK-NO-CRC: "-target-feature" "-crc"