[llvm-commits] [llvm] r156460 - in /llvm/trunk: lib/Target/Mips/MipsCondMov.td test/CodeGen/Mips/cmov.ll

[Akira Hatanaka]

Author: ahatanak
Date: Tue May  8 21:29:29 2012
New Revision: 156460

URL: http://llvm.org/viewvc/llvm-project?rev=156460&view=rev
Log:
Add another peephole pattern for conditional moves.


Modified:
    llvm/trunk/lib/Target/Mips/MipsCondMov.td
    llvm/trunk/test/CodeGen/Mips/cmov.ll

Modified: llvm/trunk/lib/Target/Mips/MipsCondMov.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsCondMov.td?rev=156460&r1=156459&r2=156460&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsCondMov.td (original)
+++ llvm/trunk/lib/Target/Mips/MipsCondMov.td Tue May  8 21:29:29 2012
@@ -83,6 +83,12 @@
             (MOVZInst DRC:$T, CRC:$lhs, DRC:$F)>;
 }
 
+multiclass MovzPats2<RegisterClass CRC, RegisterClass DRC,
+                     Instruction MOVZInst, Instruction XORiOp> {
+  def : Pat<(select (i32 (seteq CRC:$lhs, immZExt16:$uimm16)), DRC:$T, DRC:$F),
+            (MOVZInst DRC:$T, (XORiOp CRC:$lhs, immZExt16:$uimm16), DRC:$F)>;
+}
+
 multiclass MovnPats<RegisterClass CRC, RegisterClass DRC, Instruction MOVNInst,
                     Instruction XOROp> {
   def : Pat<(select (i32 (setne CRC:$lhs, CRC:$rhs)), DRC:$T, DRC:$F),
@@ -170,6 +176,7 @@
 // Instantiation of conditional move patterns.
 defm : MovzPats0<CPURegs, CPURegs, MOVZ_I_I, SLT, SLTu, SLTi, SLTiu>;
 defm : MovzPats1<CPURegs, CPURegs, MOVZ_I_I, XOR>;
+defm : MovzPats2<CPURegs, CPURegs, MOVZ_I_I, XORi>;
 let Predicates = [HasMips64] in {
   defm : MovzPats0<CPURegs, CPU64Regs, MOVZ_I_I64, SLT, SLTu, SLTi, SLTiu>;
   defm : MovzPats0<CPU64Regs, CPURegs, MOVZ_I_I, SLT64, SLTu64, SLTi64,
@@ -179,6 +186,9 @@
   defm : MovzPats1<CPURegs, CPU64Regs, MOVZ_I_I64, XOR>;
   defm : MovzPats1<CPU64Regs, CPURegs, MOVZ_I64_I, XOR64>;
   defm : MovzPats1<CPU64Regs, CPU64Regs, MOVZ_I64_I64, XOR64>;
+  defm : MovzPats2<CPURegs, CPU64Regs, MOVZ_I_I64, XORi>;
+  defm : MovzPats2<CPU64Regs, CPURegs, MOVZ_I64_I, XORi64>;
+  defm : MovzPats2<CPU64Regs, CPU64Regs, MOVZ_I64_I64, XORi64>;
 }
 
 defm : MovnPats<CPURegs, CPURegs, MOVN_I_I, XOR>;

Modified: llvm/trunk/test/CodeGen/Mips/cmov.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/cmov.ll?rev=156460&r1=156459&r2=156460&view=diff
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/cmov.ll (original)
+++ llvm/trunk/test/CodeGen/Mips/cmov.ll Tue May  8 21:29:29 2012
@@ -37,3 +37,23 @@
   ret i32 %cond
 }
 
+; O32: cmov3:
+; O32: xori $[[R0:[0-9]+]], ${{[0-9]+}}, 234
+; O32: movz ${{[0-9]+}}, ${{[0-9]+}}, $[[R0]]
+define i32 @cmov3(i32 %a, i32 %b, i32 %c) nounwind readnone {
+entry:
+  %cmp = icmp eq i32 %a, 234
+  %cond = select i1 %cmp, i32 %b, i32 %c
+  ret i32 %cond
+}
+
+; N64: cmov4:
+; N64: xori $[[R0:[0-9]+]], ${{[0-9]+}}, 234
+; N64: movz ${{[0-9]+}}, ${{[0-9]+}}, $[[R0]]
+define i64 @cmov4(i32 %a, i64 %b, i64 %c) nounwind readnone {
+entry:
+  %cmp = icmp eq i32 %a, 234
+  %cond = select i1 %cmp, i64 %b, i64 %c
+  ret i64 %cond
+}
+