commit e88aa5b4d16b05d530cd4ff2b79c05c4b519ef59
author Nate Begeman <natebegeman@mac.com> Sat Apr 09 03:05:51 2005 +0000
committer Nate Begeman <natebegeman@mac.com> Sat Apr 09 03:05:51 2005 +0000
tree e433f1c8973067245599430cb42d5cf989976bef
parent 485df9b84b5753154d3762b2a176b8b6684f716f

64b: Expand S/UREM
32b: No longer pattern match fneg(fsub(fmul)) as fnmsub
     Pattern match fsub a, mul(b, c) as fnmsub
     Pattern match fadd a, mul(b, c) as fmadd
Those changes speed up hydro2d by 2.5%, distray by 6%, and scimark by 8%


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21161 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/PowerPC/PPCISelPattern.cpp

diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp
index 046045a..aea11e4 100644
--- a/lib/Target/PowerPC/PPCISelPattern.cpp
+++ b/lib/Target/PowerPC/PPCISelPattern.cpp
@@ -1117,15 +1117,15 @@
       Opc = DestType == MVT::f64 ? PPC::FNMADD : PPC::FNMADDS;
       BuildMI(BB, Opc, 3, Result).addReg(Tmp1).addReg(Tmp2).addReg(Tmp3);
     } else if (!NoExcessFPPrecision && 
-        ISD::SUB == N.getOperand(0).getOpcode() &&
+        ISD::ADD == N.getOperand(0).getOpcode() &&
         N.getOperand(0).Val->hasOneUse() &&
-        ISD::MUL == N.getOperand(0).getOperand(0).getOpcode() &&
-        N.getOperand(0).getOperand(0).Val->hasOneUse()) {
+        ISD::MUL == N.getOperand(0).getOperand(1).getOpcode() &&
+        N.getOperand(0).getOperand(1).Val->hasOneUse()) {
       ++FusedFP; // Statistic
-      Tmp1 = SelectExpr(N.getOperand(0).getOperand(0).getOperand(0));
-      Tmp2 = SelectExpr(N.getOperand(0).getOperand(0).getOperand(1));
-      Tmp3 = SelectExpr(N.getOperand(0).getOperand(1));
-      Opc = DestType == MVT::f64 ? PPC::FNMSUB : PPC::FNMSUBS;
+      Tmp1 = SelectExpr(N.getOperand(0).getOperand(1).getOperand(0));
+      Tmp2 = SelectExpr(N.getOperand(0).getOperand(1).getOperand(1));
+      Tmp3 = SelectExpr(N.getOperand(0).getOperand(0));
+      Opc = DestType == MVT::f64 ? PPC::FNMADD : PPC::FNMADDS;
       BuildMI(BB, Opc, 3, Result).addReg(Tmp1).addReg(Tmp2).addReg(Tmp3);
     } else if (ISD::FABS == N.getOperand(0).getOpcode()) {
       Tmp1 = SelectExpr(N.getOperand(0).getOperand(0));
@@ -1181,6 +1181,16 @@
       BuildMI(BB, Opc, 3, Result).addReg(Tmp1).addReg(Tmp2).addReg(Tmp3);
       return Result;
     }
+    if (!NoExcessFPPrecision && N.getOperand(1).getOpcode() == ISD::MUL &&
+        N.getOperand(1).Val->hasOneUse()) {
+      ++FusedFP; // Statistic
+      Tmp1 = SelectExpr(N.getOperand(1).getOperand(0));
+      Tmp2 = SelectExpr(N.getOperand(1).getOperand(1));
+      Tmp3 = SelectExpr(N.getOperand(0));
+      Opc = DestType == MVT::f64 ? PPC::FMADD : PPC::FMADDS;
+      BuildMI(BB, Opc, 3, Result).addReg(Tmp1).addReg(Tmp2).addReg(Tmp3);
+      return Result;
+    }
     Opc = DestType == MVT::f64 ? PPC::FADD : PPC::FADDS;
     Tmp1 = SelectExpr(N.getOperand(0));
     Tmp2 = SelectExpr(N.getOperand(1));
@@ -1198,6 +1208,16 @@
       BuildMI(BB, Opc, 3, Result).addReg(Tmp1).addReg(Tmp2).addReg(Tmp3);
       return Result;
     }
+    if (!NoExcessFPPrecision && N.getOperand(1).getOpcode() == ISD::MUL &&
+        N.getOperand(1).Val->hasOneUse()) {
+      ++FusedFP; // Statistic
+      Tmp1 = SelectExpr(N.getOperand(1).getOperand(0));
+      Tmp2 = SelectExpr(N.getOperand(1).getOperand(1));
+      Tmp3 = SelectExpr(N.getOperand(0));
+      Opc = DestType == MVT::f64 ? PPC::FNMSUB : PPC::FNMSUBS;
+      BuildMI(BB, Opc, 3, Result).addReg(Tmp1).addReg(Tmp2).addReg(Tmp3);
+      return Result;
+    }
     Opc = DestType == MVT::f64 ? PPC::FSUB : PPC::FSUBS;
     Tmp1 = SelectExpr(N.getOperand(0));
     Tmp2 = SelectExpr(N.getOperand(1));