Expand pseudos/macros for Selt. This is the last of the complex

macros.The rest is some small misc. stuff.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@175950 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Target/Mips/Mips16InstrInfo.td

@@ -416,6 +416,7 @@ class SelT<string op1, string op2>:
                !strconcat(op1, "\t.+4\n\tmove $rd, $rs"))), []> {
   let isCodeGenOnly=1;
   let Constraints = "$rd = $rd_";
+  let usesCustomInserter = 1;
 }
 
 //

lib/Target/Mips/MipsISelLowering.cpp

@@ -1298,6 +1298,72 @@ MachineBasicBlock *MipsTargetLowering::EmitSel16(unsigned Opc, MachineInstr *MI,
   return BB;
 }
 
+MachineBasicBlock *MipsTargetLowering::EmitSelT16
+  (unsigned Opc1, unsigned Opc2,
+   MachineInstr *MI, MachineBasicBlock *BB) const {
+  if (DontExpandCondPseudos16)
+    return BB;
+  const TargetInstrInfo *TII = getTargetMachine().getInstrInfo();
+  DebugLoc dl = MI->getDebugLoc();
+  // To "insert" a SELECT_CC instruction, we actually have to insert the
+  // diamond control-flow pattern.  The incoming instruction knows the
+  // destination vreg to set, the condition code register to branch on, the
+  // true/false values to select between, and a branch opcode to use.
+  const BasicBlock *LLVM_BB = BB->getBasicBlock();
+  MachineFunction::iterator It = BB;
+  ++It;
+
+  //  thisMBB:
+  //  ...
+  //   TrueVal = ...
+  //   setcc r1, r2, r3
+  //   bNE   r1, r0, copy1MBB
+  //   fallthrough --> copy0MBB
+  MachineBasicBlock *thisMBB  = BB;
+  MachineFunction *F = BB->getParent();
+  MachineBasicBlock *copy0MBB = F->CreateMachineBasicBlock(LLVM_BB);
+  MachineBasicBlock *sinkMBB  = F->CreateMachineBasicBlock(LLVM_BB);
+  F->insert(It, copy0MBB);
+  F->insert(It, sinkMBB);
+
+  // Transfer the remainder of BB and its successor edges to sinkMBB.
+  sinkMBB->splice(sinkMBB->begin(), BB,
+                  llvm::next(MachineBasicBlock::iterator(MI)),
+                  BB->end());
+  sinkMBB->transferSuccessorsAndUpdatePHIs(BB);
+
+  // Next, add the true and fallthrough blocks as its successors.
+  BB->addSuccessor(copy0MBB);
+  BB->addSuccessor(sinkMBB);
+
+  BuildMI(BB, dl, TII->get(Opc2)).addReg(MI->getOperand(3).getReg())
+    .addReg(MI->getOperand(4).getReg());
+  BuildMI(BB, dl, TII->get(Opc1)).addMBB(sinkMBB);
+
+  //  copy0MBB:
+  //   %FalseValue = ...
+  //   # fallthrough to sinkMBB
+  BB = copy0MBB;
+
+  // Update machine-CFG edges
+  BB->addSuccessor(sinkMBB);
+
+  //  sinkMBB:
+  //   %Result = phi [ %TrueValue, thisMBB ], [ %FalseValue, copy0MBB ]
+  //  ...
+  BB = sinkMBB;
+
+  BuildMI(*BB, BB->begin(), dl,
+          TII->get(Mips::PHI), MI->getOperand(0).getReg())
+    .addReg(MI->getOperand(1).getReg()).addMBB(thisMBB)
+    .addReg(MI->getOperand(2).getReg()).addMBB(copy0MBB);
+
+  MI->eraseFromParent();   // The pseudo instruction is gone now.
+  return BB;
+
+}
+
+
 MachineBasicBlock *MipsTargetLowering::EmitSeliT16
   (unsigned Opc1, unsigned Opc2,
    MachineInstr *MI, MachineBasicBlock *BB) const {
@@ -1490,6 +1556,18 @@ MipsTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
     return EmitSeliT16(Mips::BtnezX16, Mips::SltiRxImmX16, MI, BB);
   case Mips::SelTBtneZSltiu:
     return EmitSeliT16(Mips::BtnezX16, Mips::SltiuRxImmX16, MI, BB);
+  case Mips::SelTBteqZCmp:
+    return EmitSelT16(Mips::BteqzX16, Mips::CmpRxRy16, MI, BB);
+  case Mips::SelTBteqZSlt:
+    return EmitSelT16(Mips::BteqzX16, Mips::SltRxRy16, MI, BB);
+  case Mips::SelTBteqZSltu:
+    return EmitSelT16(Mips::BteqzX16, Mips::SltuRxRy16, MI, BB);
+  case Mips::SelTBtneZCmp:
+    return EmitSelT16(Mips::BtnezX16, Mips::CmpRxRy16, MI, BB);
+  case Mips::SelTBtneZSlt:
+    return EmitSelT16(Mips::BtnezX16, Mips::SltRxRy16, MI, BB);
+  case Mips::SelTBtneZSltu:
+    return EmitSelT16(Mips::BtnezX16, Mips::SltuRxRy16, MI, BB);
   }
 }
 

lib/Target/Mips/MipsISelLowering.h

@@ -410,6 +410,9 @@ namespace llvm {
                                   MachineInstr *MI,
                                   MachineBasicBlock *BB) const;
 
+    MachineBasicBlock *EmitSelT16(unsigned Opc1, unsigned Opc2,
+                                  MachineInstr *MI,
+                                  MachineBasicBlock *BB) const;
   };
 }
 

test/CodeGen/Mips/br-jmp.ll

@@ -15,3 +15,4 @@ bosco:                                            ; preds = %bosco, %entry
 ; CHECK-STATIC: j	$BB0_1
 ; CHECK-PIC16: b	$BB0_1
 ; CHECK-STATIC16: b	$BB0_1
+

test/CodeGen/Mips/selpat.ll

@@ -20,7 +20,7 @@ entry:
   %cond = select i1 %cmp, i32 %2, i32 %3
   store i32 %cond, i32* @z1, align 4
 ; 16:	cmp	${{[0-9]+}}, ${{[0-9]+}}
-; 16:	bteqz	.+4
+; 16:	bteqz	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   store i32 %cond, i32* @z2, align 4
   %4 = load i32* @c, align 4
@@ -91,7 +91,7 @@ entry:
   %cond = select i1 %cmp, i32 %2, i32 %3
   store i32 %cond, i32* @z1, align 4
 ; 16:	slt	${{[0-9]+}}, ${{[0-9]+}}
-; 16:	bteqz	.+4
+; 16:	bteqz	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   %cmp1 = icmp sge i32 %1, %0
   %cond5 = select i1 %cmp1, i32 %3, i32 %2
@@ -112,7 +112,7 @@ entry:
   %1 = load i32* @b, align 4
   %cmp = icmp sgt i32 %0, %1
 ; 16:	slt	${{[0-9]+}}, ${{[0-9]+}}
-; 16:	btnez	.+4
+; 16:	btnez	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   %2 = load i32* @f, align 4
   %3 = load i32* @t, align 4
@@ -141,7 +141,7 @@ entry:
   %cond = select i1 %cmp, i32 %2, i32 %3
   store i32 %cond, i32* @z1, align 4
 ; 16:	slt	${{[0-9]+}}, ${{[0-9]+}}
-; 16:	bteqz	.+4
+; 16:	bteqz	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   %cmp1 = icmp sle i32 %1, %0
   %cond5 = select i1 %cmp1, i32 %3, i32 %2
@@ -165,7 +165,7 @@ entry:
   %cond = select i1 %cmp, i32 %1, i32 %2
   store i32 %cond, i32* @z1, align 4
 ; 16:	slti	${{[0-9]+}}, {{[0-9]+}}
-; 16:	btnez	.+4
+; 16:	btnez	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   %3 = load i32* @b, align 4
   %cmp1 = icmp slt i32 %3, 2
@@ -192,7 +192,7 @@ entry:
   %cond = select i1 %cmp, i32 %2, i32 %3
   store i32 %cond, i32* @z1, align 4
 ; 16:	cmp	${{[0-9]+}}, ${{[0-9]+}}
-; 16:	btnez	.+4
+; 16:	btnez	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   store i32 %cond, i32* @z2, align 4
   %4 = load i32* @c, align 4
@@ -284,7 +284,7 @@ entry:
   %cond = select i1 %cmp, i32 %2, i32 %3
   store i32 %cond, i32* @z1, align 4
 ; 16:	sltu	${{[0-9]+}}, ${{[0-9]+}}
-; 16:	bteqz	.+4
+; 16:	bteqz	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   %cmp1 = icmp uge i32 %1, %0
   %cond5 = select i1 %cmp1, i32 %3, i32 %2
@@ -309,7 +309,7 @@ entry:
   %cond = select i1 %cmp, i32 %2, i32 %3
   store i32 %cond, i32* @z1, align 4
 ; 16:	sltu	${{[0-9]+}}, ${{[0-9]+}}
-; 16:	btnez	.+4
+; 16:	btnez	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   %cmp1 = icmp ugt i32 %1, %0
   %cond5 = select i1 %cmp1, i32 %3, i32 %2
@@ -334,7 +334,7 @@ entry:
   %cond = select i1 %cmp, i32 %2, i32 %3
   store i32 %cond, i32* @z1, align 4
 ; 16:	sltu	${{[0-9]+}}, ${{[0-9]+}}
-; 16:	bteqz	.+4
+; 16:	bteqz	$BB{{[0-9]+}}_{{[0-9]}}
 ; 16: 	move    ${{[0-9]+}}, ${{[0-9]+}}
   %cmp1 = icmp ule i32 %1, %0
   %cond5 = select i1 %cmp1, i32 %3, i32 %2