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Expand mips16 SelT form pseudso/macros.

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llvm-svn: 175862
This commit is contained in:
Reed Kotler 2013-02-22 05:10:51 +00:00
parent 6da577a986
commit 340c9d39ce
10 changed files with 166 additions and 4 deletions
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1
lib/Target/Mips/Mips16InstrInfo.td
View File

@ -392,6 +392,7 @@ class SeliT<string op1, string op2>:
!strconcat(op1, "\t.+4\n\tmove $rd, $rs"))), []> {
let isCodeGenOnly=1;
let Constraints = "$rd = $rd_";
let usesCustomInserter = 1;
}
//

77
lib/Target/Mips/MipsISelLowering.cpp
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@ -1298,6 +1298,71 @@ 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())
.addImm(MI->getOperand(4).getImm());
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::EmitInstrWithCustomInserter(MachineInstr *MI,
MachineBasicBlock *BB) const {
@ -1413,6 +1478,18 @@ MipsTargetLowering::EmitInstrWithCustomInserter(MachineInstr *MI,
return EmitSel16(Mips::BeqzRxImm16, MI, BB);
case Mips::SelBneZ:
return EmitSel16(Mips::BnezRxImm16, MI, BB);
case Mips::SelTBteqZCmpi:
return EmitSelT16(Mips::BteqzX16, Mips::CmpiRxImmX16, MI, BB);
case Mips::SelTBteqZSlti:
return EmitSelT16(Mips::BteqzX16, Mips::SltiRxImmX16, MI, BB);
case Mips::SelTBteqZSltiu:
return EmitSelT16(Mips::BteqzX16, Mips::SltiuRxImmX16, MI, BB);
case Mips::SelTBtneZCmpi:
return EmitSelT16(Mips::BtnezX16, Mips::CmpiRxImmX16, MI, BB);
case Mips::SelTBtneZSlti:
return EmitSelT16(Mips::BtnezX16, Mips::SltiRxImmX16, MI, BB);
case Mips::SelTBtneZSltiu:
return EmitSelT16(Mips::BtnezX16, Mips::SltiuRxImmX16, MI, BB);
}
}

3
lib/Target/Mips/MipsISelLowering.h
View File

@ -406,6 +406,9 @@ namespace llvm {
MachineBasicBlock *BB, unsigned Size) const;
MachineBasicBlock *EmitSel16(unsigned Opc, MachineInstr *MI,
MachineBasicBlock *BB) const;
MachineBasicBlock *EmitSelT16(unsigned Opc1, unsigned Opc2,
MachineInstr *MI,
MachineBasicBlock *BB) const;
};
}

26
test/CodeGen/Mips/selTBteqzCmpi.ll Normal file
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@ -0,0 +1,26 @@
; RUN: llc -march=mipsel -mcpu=mips16 -relocation-model=pic < %s | FileCheck %s -check-prefix=16
@i = global i32 1, align 4
@j = global i32 2, align 4
@a = global i32 5, align 4
@.str = private unnamed_addr constant [8 x i8] c"%i = 2\0A\00", align 1
@k = common global i32 0, align 4
define void @t() nounwind "target-cpu"="mips16" "target-features"="+mips16,+o32" {
entry:
%0 = load i32* @a, align 4
%cmp = icmp eq i32 %0, 10
%1 = load i32* @i, align 4
%2 = load i32* @j, align 4
%cond = select i1 %cmp, i32 %1, i32 %2
store i32 %cond, i32* @i, align 4
ret void
}
attributes #0 = { nounwind "target-cpu"="mips16" "target-features"="+mips16,+o32" }
; 16: cmpi ${{[0-9]+}}, 10
; 16: bteqz $BB{{[0-9]+}}_{{[0-9]}}

26
test/CodeGen/Mips/selTBtnezCmpi.ll Normal file
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@ -0,0 +1,26 @@
; RUN: llc -march=mipsel -mcpu=mips16 -relocation-model=pic < %s | FileCheck %s -check-prefix=16
@i = global i32 1, align 4
@j = global i32 2, align 4
@a = global i32 5, align 4
@.str = private unnamed_addr constant [8 x i8] c"%i = 1\0A\00", align 1
@k = common global i32 0, align 4
define void @t() nounwind "target-cpu"="mips16" "target-features"="+mips16,+o32" {
entry:
%0 = load i32* @a, align 4
%cmp = icmp ne i32 %0, 10
%1 = load i32* @i, align 4
%2 = load i32* @j, align 4
%cond = select i1 %cmp, i32 %1, i32 %2
store i32 %cond, i32* @i, align 4
ret void
}
; 16: cmpi ${{[0-9]+}}, 10
; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}
attributes #0 = { nounwind "target-cpu"="mips16" "target-features"="+mips16,+o32" }

25
test/CodeGen/Mips/selTBtnezSlti.ll Normal file
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@ -0,0 +1,25 @@
; RUN: llc -march=mipsel -mcpu=mips16 -relocation-model=pic < %s | FileCheck %s -check-prefix=16
@i = global i32 1, align 4
@j = global i32 2, align 4
@a = global i32 5, align 4
@.str = private unnamed_addr constant [9 x i8] c"%i = 2 \0A\00", align 1
@k = common global i32 0, align 4
define void @t() nounwind "target-cpu"="mips16" "target-features"="+mips16,+o32" {
entry:
%0 = load i32* @a, align 4
%cmp = icmp slt i32 %0, 10
%1 = load i32* @j, align 4
%2 = load i32* @i, align 4
%cond = select i1 %cmp, i32 %1, i32 %2
store i32 %cond, i32* @i, align 4
ret void
}
attributes #0 = { nounwind "target-cpu"="mips16" "target-features"="+mips16,+o32" }
; 16: slti ${{[0-9]+}}, 10
; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}

2
test/CodeGen/Mips/selgek.ll
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@ -90,3 +90,5 @@ attributes #1 = { "target-cpu"="mips16" "target-features"="+mips16,+o32" }
; 16: slti ${{[0-9]+}}, 2 # 16 bit inst
; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}

1
test/CodeGen/Mips/selltk.ll
View File

@ -90,3 +90,4 @@ attributes #1 = { "target-cpu"="mips16" "target-features"="+mips16,+o32" }
; 16: slti ${{[0-9]+}}, 3 # 16 bit inst
; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}

1
test/CodeGen/Mips/selne.ll
View File

@ -94,3 +94,4 @@ attributes #1 = { "target-cpu"="mips16" "target-features"="+mips16,+o32" }
; 16: cmp ${{[0-9]+}}, ${{[0-9]+}}
; 16: bteqz $BB{{[0-9]+}}_{{[0-9]}}

8
test/CodeGen/Mips/selpat.ll
View File

@ -41,7 +41,7 @@ entry:
%cond = select i1 %cmp, i32 %1, i32 %2
store i32 %cond, i32* @z1, align 4
; 16: cmpi ${{[0-9]+}}, 1
; 16: bteqz .+4
; 16: bteqz $BB{{[0-9]+}}_{{[0-9]}}
; 16: move ${{[0-9]+}}, ${{[0-9]+}}
%cmp1 = icmp eq i32 %0, 10
%cond5 = select i1 %cmp1, i32 %2, i32 %1
@ -51,7 +51,7 @@ entry:
%cond10 = select i1 %cmp6, i32 %2, i32 %1
store i32 %cond10, i32* @z3, align 4
; 16: cmpi ${{[0-9]+}}, 10
; 16: bteqz .+4
; 16: bteqz $BB{{[0-9]+}}_{{[0-9]}}
; 16: move ${{[0-9]+}}, ${{[0-9]+}}
%cmp11 = icmp eq i32 %3, 10
%cond15 = select i1 %cmp11, i32 %1, i32 %2
@ -212,7 +212,7 @@ entry:
%cond = select i1 %cmp, i32 %1, i32 %2
store i32 %cond, i32* @z1, align 4
; 16: cmpi ${{[0-9]+}}, 1
; 16: btnez .+4
; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}
; 16: move ${{[0-9]+}}, ${{[0-9]+}}
%cmp1 = icmp ne i32 %0, 10
%cond5 = select i1 %cmp1, i32 %2, i32 %1
@ -222,7 +222,7 @@ entry:
%cond10 = select i1 %cmp6, i32 %2, i32 %1
store i32 %cond10, i32* @z3, align 4
; 16: cmpi ${{[0-9]+}}, 10
; 16: btnez .+4
; 16: btnez $BB{{[0-9]+}}_{{[0-9]}}
; 16: move ${{[0-9]+}}, ${{[0-9]+}}
%cmp11 = icmp ne i32 %3, 10
%cond15 = select i1 %cmp11, i32 %1, i32 %2