Revert r304953 for release 5.0.0

This is causing failures when compiling clang with -O3
as one of the structures used by clang is passed by
value and uses the fastcc calling convention.

Faliures manifest for stage2 mips build.

llvm-svn: 310057

6 files changed, 1 insertions, 110 deletions

diff --git a/clang/include/clang/Driver/Options.td b/clang/include/clang/Driver/Options.td
index 571d52fc0aa..4350f6361e5 100644
--- a/clang/include/clang/Driver/Options.td
+++ b/clang/include/clang/Driver/Options.td
@@ -2019,10 +2019,6 @@ def mdspr2 : Flag<["-"], "mdspr2">, Group<m_Group>;
 def mno_dspr2 : Flag<["-"], "mno-dspr2">, Group<m_Group>;
 def msingle_float : Flag<["-"], "msingle-float">, Group<m_Group>;
 def mdouble_float : Flag<["-"], "mdouble-float">, Group<m_Group>;
-def mmadd4 : Flag<["-"], "mmadd4">, Group<m_Group>,
-  HelpText<"Enable the generation of 4-operand madd.s, madd.d and related instructions.">;
-def mno_madd4 : Flag<["-"], "mno-madd4">, Group<m_Group>,
-  HelpText<"Disable the generation of 4-operand madd.s, madd.d and related instructions.">;
 def mmsa : Flag<["-"], "mmsa">, Group<m_Group>,
   HelpText<"Enable MSA ASE (MIPS only)">;
 def mno_msa : Flag<["-"], "mno-msa">, Group<m_Group>,
diff --git a/clang/lib/Basic/Targets/Mips.cpp b/clang/lib/Basic/Targets/Mips.cpp
index 065138b1448..798345546b4 100644
--- a/clang/lib/Basic/Targets/Mips.cpp
+++ b/clang/lib/Basic/Targets/Mips.cpp
@@ -166,9 +166,6 @@ void MipsTargetInfo::getTargetDefines(const LangOptions &Opts,
   if (HasMSA)
     Builder.defineMacro("__mips_msa", Twine(1));
 
-  if (DisableMadd4)
-    Builder.defineMacro("__mips_no_madd4", Twine(1));
-
   Builder.defineMacro("_MIPS_SZPTR", Twine(getPointerWidth(0)));
   Builder.defineMacro("_MIPS_SZINT", Twine(getIntWidth()));
   Builder.defineMacro("_MIPS_SZLONG", Twine(getLongWidth()));
diff --git a/clang/lib/Basic/Targets/Mips.h b/clang/lib/Basic/Targets/Mips.h
index 20382b280a6..e5e5e4bab41 100644
--- a/clang/lib/Basic/Targets/Mips.h
+++ b/clang/lib/Basic/Targets/Mips.h
@@ -52,7 +52,6 @@ class LLVM_LIBRARY_VISIBILITY MipsTargetInfo : public TargetInfo {
   enum MipsFloatABI { HardFloat, SoftFloat } FloatABI;
   enum DspRevEnum { NoDSP, DSP1, DSP2 } DspRev;
   bool HasMSA;
-  bool DisableMadd4;
 
 protected:
   bool HasFP64;
@@ -63,7 +62,7 @@ public:
       : TargetInfo(Triple), IsMips16(false), IsMicromips(false),
         IsNan2008(false), IsSingleFloat(false), IsNoABICalls(false),
         CanUseBSDABICalls(false), FloatABI(HardFloat), DspRev(NoDSP),
-        HasMSA(false), DisableMadd4(false), HasFP64(false) {
+        HasMSA(false), HasFP64(false) {
     TheCXXABI.set(TargetCXXABI::GenericMIPS);
 
     setABI((getTriple().getArch() == llvm::Triple::mips ||
@@ -320,8 +319,6 @@ public:
         DspRev = std::max(DspRev, DSP2);
       else if (Feature == "+msa")
         HasMSA = true;
-      else if (Feature == "+nomadd4")
-        DisableMadd4 = true;
       else if (Feature == "+fp64")
         HasFP64 = true;
       else if (Feature == "-fp64")
diff --git a/clang/lib/Driver/ToolChains/Arch/Mips.cpp b/clang/lib/Driver/ToolChains/Arch/Mips.cpp
index c0e5c2e7a4f..c11e2518354 100644
--- a/clang/lib/Driver/ToolChains/Arch/Mips.cpp
+++ b/clang/lib/Driver/ToolChains/Arch/Mips.cpp
@@ -297,8 +297,6 @@ void mips::getMIPSTargetFeatures(const Driver &D, const llvm::Triple &Triple,
 
   AddTargetFeature(Args, Features, options::OPT_mno_odd_spreg,
                    options::OPT_modd_spreg, "nooddspreg");
-  AddTargetFeature(Args, Features, options::OPT_mno_madd4, options::OPT_mmadd4,
-                   "nomadd4");
   AddTargetFeature(Args, Features, options::OPT_mlong_calls,
                    options::OPT_mno_long_calls, "long-calls");
   AddTargetFeature(Args, Features, options::OPT_mmt, options::OPT_mno_mt, "mt");
diff --git a/clang/test/CodeGen/mips-madd4.c b/clang/test/CodeGen/mips-madd4.c
deleted file mode 100644
index bc7bb593f95..00000000000
--- a/clang/test/CodeGen/mips-madd4.c
+++ /dev/null
@@ -1,87 +0,0 @@
-// REQUIRES: mips-registered-target
-// RUN: %clang --target=mips64-unknown-linux -S -mmadd4    %s -o -| FileCheck %s -check-prefix=MADD4
-// RUN: %clang --target=mips64-unknown-linux -S -mno-madd4 %s -o -| FileCheck %s -check-prefix=NOMADD4
-// RUN: %clang --target=mips64-unknown-linux -S -mmadd4    -fno-honor-nans %s -o -| FileCheck %s -check-prefix=MADD4-NONAN
-// RUN: %clang --target=mips64-unknown-linux -S -mno-madd4 -fno-honor-nans %s -o -| FileCheck %s -check-prefix=NOMADD4-NONAN
- 
-float madd_s (float f, float g, float h)
-{
-  return (f * g) + h;
-}
-// MADD4:   madd.s
-// NOMADD4: mul.s
-// NOMADD4: add.s
-
-float msub_s (float f, float g, float h)
-{
-  return (f * g) - h;
-}
-// MADD4:   msub.s
-// NOMADD4: mul.s
-// NOMADD4: sub.s
-
-double madd_d (double f, double g, double h)
-{
-  return (f * g) + h;
-}
-// MADD4:   madd.d
-// NOMADD4: mul.d
-// NOMADD4: add.d
-
-double msub_d (double f, double g, double h)
-{
-  return (f * g) - h;
-}
-// MADD4:   msub.d
-// NOMADD4: mul.d
-// NOMADD4: sub.d
-
-
-float nmadd_s (float f, float g, float h)
-{
-  // FIXME: Zero has been explicitly placed to force generation of a positive
-  // zero in IR until pattern used to match this instruction is changed to
-  // comply with negative zero as well.
-  return 0-((f * g) + h);
-}
-// MADD4-NONAN:   nmadd.s
-// NOMADD4-NONAN: mul.s
-// NOMADD4-NONAN: add.s
-// NOMADD4-NONAN: sub.s
-
-float nmsub_s (float f, float g, float h)
-{
-  // FIXME: Zero has been explicitly placed to force generation of a positive
-  // zero in IR until pattern used to match this instruction is changed to
-  // comply with negative zero as well.
-  return 0-((f * g) - h);
-}
-// MADD4-NONAN:   nmsub.s
-// NOMADD4-NONAN: mul.s
-// NOMADD4-NONAN: sub.s
-// NOMADD4-NONAN: sub.s
-
-double nmadd_d (double f, double g, double h)
-{
-  // FIXME: Zero has been explicitly placed to force generation of a positive
-  // zero in IR until pattern used to match this instruction is changed to
-  // comply with negative zero as well.
-  return 0-((f * g) + h);
-}
-// MADD4-NONAN:   nmadd.d
-// NOMADD4-NONAN: mul.d
-// NOMADD4-NONAN: add.d
-// NOMADD4-NONAN: sub.d
-
-double nmsub_d (double f, double g, double h)
-{
-  // FIXME: Zero has been explicitly placed to force generation of a positive
-  // zero in IR until pattern used to match this instruction is changed to
-  // comply with negative zero as well.
-  return 0-((f * g) - h);
-}
-// MADD4-NONAN:   nmsub.d
-// NOMADD4-NONAN: mul.d
-// NOMADD4-NONAN: sub.d
-// NOMADD4-NONAN: sub.d
-
diff --git a/clang/test/Preprocessor/init.c b/clang/test/Preprocessor/init.c
index 11f05e6241e..dd213308d61 100644
--- a/clang/test/Preprocessor/init.c
+++ b/clang/test/Preprocessor/init.c
@@ -4840,16 +4840,6 @@
 // RUN:   | FileCheck -match-full-lines -check-prefix MIPS-MSA %s
 // MIPS-MSA:#define __mips_msa 1
 //
-// RUN: %clang_cc1 -target-feature +nomadd4 \
-// RUN:   -E -dM -triple=mips-none-none < /dev/null \
-// RUN:   | FileCheck -match-full-lines -check-prefix MIPS-NOMADD4 %s
-// MIPS-NOMADD4:#define __mips_no_madd4 1
-//
-// RUN: %clang_cc1 \
-// RUN:   -E -dM -triple=mips-none-none < /dev/null \
-// RUN:   | FileCheck -match-full-lines -check-prefix MIPS-MADD4 %s
-// MIPS-MADD4-NOT:#define __mips_no_madd4 1
-//
 // RUN: %clang_cc1 -target-cpu mips32r3 -target-feature +nan2008 \
 // RUN:   -E -dM -triple=mips-none-none < /dev/null \
 // RUN:   | FileCheck -match-full-lines -check-prefix MIPS-NAN2008 %s