[llvm-commits] [llvm] r154546 - in /llvm/trunk: lib/Target/Mips/MipsISelLowering.cpp lib/Target/Mips/MipsInstrFPU.td test/CodeGen/Mips/fneg.ll

[Akira Hatanaka]

Author: ahatanak
Date: Wed Apr 11 17:59:08 2012
New Revision: 154546

URL: http://llvm.org/viewvc/llvm-project?rev=154546&view=rev
Log:
Emit neg.s or neg.d only if -enable-no-nans-fp-math is supplied by user,
otherwise expand FNEG during legalization.


Added:
    llvm/trunk/test/CodeGen/Mips/fneg.ll
Modified:
    llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
    llvm/trunk/lib/Target/Mips/MipsInstrFPU.td

Modified: llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp?rev=154546&r1=154545&r2=154546&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/Mips/MipsISelLowering.cpp Wed Apr 11 17:59:08 2012
@@ -216,6 +216,11 @@
   setOperationAction(ISD::FREM,              MVT::f32,   Expand);
   setOperationAction(ISD::FREM,              MVT::f64,   Expand);
 
+  if (!TM.Options.NoNaNsFPMath) {
+    setOperationAction(ISD::FNEG,             MVT::f32,   Expand);
+    setOperationAction(ISD::FNEG,             MVT::f64,   Expand);
+  }
+
   setOperationAction(ISD::EXCEPTIONADDR,     MVT::i32, Expand);
   setOperationAction(ISD::EXCEPTIONADDR,     MVT::i64, Expand);
   setOperationAction(ISD::EHSELECTION,       MVT::i32, Expand);

Modified: llvm/trunk/lib/Target/Mips/MipsInstrFPU.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsInstrFPU.td?rev=154546&r1=154545&r2=154546&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsInstrFPU.td (original)
+++ llvm/trunk/lib/Target/Mips/MipsInstrFPU.td Wed Apr 11 17:59:08 2012
@@ -190,9 +190,10 @@
  def CVT_D64_L : FFR1<0x21, 21, "cvt", "d.l", FGR64, FGR64>;
 }
 
-let Predicates = [NoNaNsFPMath] in
-defm FABS    : FFR1P_M<0x5, "abs",  fabs>;
-defm FNEG    : FFR1P_M<0x7, "neg",  fneg>;
+let Predicates = [NoNaNsFPMath] in {
+  defm FABS    : FFR1P_M<0x5, "abs",  fabs>;
+  defm FNEG    : FFR1P_M<0x7, "neg",  fneg>;
+}
 defm FSQRT   : FFR1P_M<0x4, "sqrt", fsqrt>;
 
 // The odd-numbered registers are only referenced when doing loads,

Added: llvm/trunk/test/CodeGen/Mips/fneg.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/fneg.ll?rev=154546&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/fneg.ll (added)
+++ llvm/trunk/test/CodeGen/Mips/fneg.ll Wed Apr 11 17:59:08 2012
@@ -0,0 +1,17 @@
+; RUN: llc  < %s -march=mipsel -mcpu=mips32 | FileCheck %s 
+
+define float @foo0(i32 %a, float %d) nounwind readnone {
+entry:
+; CHECK-NOT: fabs.s
+  %sub = fsub float -0.000000e+00, %d
+  ret float %sub
+}
+
+define double @foo1(i32 %a, double %d) nounwind readnone {
+entry:
+; CHECK: foo1
+; CHECK-NOT: fabs.d
+; CHECK: jr
+  %sub = fsub double -0.000000e+00, %d
+  ret double %sub
+}