diff options
| -rw-r--r-- | lib/Target/Mips/MipsFastISel.cpp | 100 | ||||
| -rw-r--r-- | test/CodeGen/Mips/Fast-ISel/loadstore2.ll | 83 |
2 files changed, 176 insertions, 7 deletions
diff --git a/lib/Target/Mips/MipsFastISel.cpp b/lib/Target/Mips/MipsFastISel.cpp index 9a60aa7b9f..375d9b2055 100644 --- a/lib/Target/Mips/MipsFastISel.cpp +++ b/lib/Target/Mips/MipsFastISel.cpp @@ -69,8 +69,11 @@ public: bool ComputeAddress(const Value *Obj, Address &Addr); private: + bool EmitLoad(MVT VT, unsigned &ResultReg, Address &Addr, + unsigned Alignment = 0); bool EmitStore(MVT VT, unsigned SrcReg, Address &Addr, unsigned Alignment = 0); + bool SelectLoad(const Instruction *I); bool SelectRet(const Instruction *I); bool SelectStore(const Instruction *I); @@ -105,6 +108,11 @@ private: return EmitInst(Opc).addReg(SrcReg).addReg(MemReg).addImm(MemOffset); } + MachineInstrBuilder EmitInstLoad(unsigned Opc, unsigned DstReg, + unsigned MemReg, int64_t MemOffset) { + return EmitInst(Opc, DstReg).addReg(MemReg).addImm(MemOffset); + } + #include "MipsGenFastISel.inc" }; @@ -126,6 +134,8 @@ bool MipsFastISel::isLoadTypeLegal(Type *Ty, MVT &VT) { // We will extend this in a later patch: // If this is a type than can be sign or zero-extended to a basic operation // go ahead and accept it now. + if (VT == MVT::i8 || VT == MVT::i16) + return true; return false; } @@ -142,6 +152,45 @@ bool MipsFastISel::ComputeAddress(const Value *Obj, Address &Addr) { return Addr.Base.Reg != 0; } +bool MipsFastISel::EmitLoad(MVT VT, unsigned &ResultReg, Address &Addr, + unsigned Alignment) { + // + // more cases will be handled here in following patches. + // + unsigned Opc; + switch (VT.SimpleTy) { + case MVT::i32: { + ResultReg = createResultReg(&Mips::GPR32RegClass); + Opc = Mips::LW; + break; + } + case MVT::i16: { + ResultReg = createResultReg(&Mips::GPR32RegClass); + Opc = Mips::LHu; + break; + } + case MVT::i8: { + ResultReg = createResultReg(&Mips::GPR32RegClass); + Opc = Mips::LBu; + break; + } + case MVT::f32: { + ResultReg = createResultReg(&Mips::FGR32RegClass); + Opc = Mips::LWC1; + break; + } + case MVT::f64: { + ResultReg = createResultReg(&Mips::AFGR64RegClass); + Opc = Mips::LDC1; + break; + } + default: + return false; + } + EmitInstLoad(Opc, ResultReg, Addr.Base.Reg, Addr.Offset); + return true; +} + // Materialize a constant into a register, and return the register // number (or zero if we failed to handle it). unsigned MipsFastISel::TargetMaterializeConstant(const Constant *C) { @@ -167,14 +216,49 @@ bool MipsFastISel::EmitStore(MVT VT, unsigned SrcReg, Address &Addr, // // more cases will be handled here in following patches. // - if (VT == MVT::i32) - EmitInstStore(Mips::SW, SrcReg, Addr.Base.Reg, Addr.Offset); - else if (VT == MVT::f32) - EmitInstStore(Mips::SWC1, SrcReg, Addr.Base.Reg, Addr.Offset); - else if (VT == MVT::f64) - EmitInstStore(Mips::SDC1, SrcReg, Addr.Base.Reg, Addr.Offset); - else + unsigned Opc; + switch (VT.SimpleTy) { + case MVT::i8: + Opc = Mips::SB; + break; + case MVT::i16: + Opc = Mips::SH; + break; + case MVT::i32: + Opc = Mips::SW; + break; + case MVT::f32: + Opc = Mips::SWC1; + break; + case MVT::f64: + Opc = Mips::SDC1; + break; + default: + return false; + } + EmitInstStore(Opc, SrcReg, Addr.Base.Reg, Addr.Offset); + return true; +} + +bool MipsFastISel::SelectLoad(const Instruction *I) { + // Atomic loads need special handling. + if (cast<LoadInst>(I)->isAtomic()) + return false; + + // Verify we have a legal type before going any further. + MVT VT; + if (!isLoadTypeLegal(I->getType(), VT)) + return false; + + // See if we can handle this address. + Address Addr; + if (!ComputeAddress(I->getOperand(0), Addr)) + return false; + + unsigned ResultReg; + if (!EmitLoad(VT, ResultReg, Addr, cast<LoadInst>(I)->getAlignment())) return false; + UpdateValueMap(I, ResultReg); return true; } @@ -224,6 +308,8 @@ bool MipsFastISel::TargetSelectInstruction(const Instruction *I) { switch (I->getOpcode()) { default: break; + case Instruction::Load: + return SelectLoad(I); case Instruction::Store: return SelectStore(I); case Instruction::Ret: diff --git a/test/CodeGen/Mips/Fast-ISel/loadstore2.ll b/test/CodeGen/Mips/Fast-ISel/loadstore2.ll new file mode 100644 index 0000000000..f113a0eb1d --- /dev/null +++ b/test/CodeGen/Mips/Fast-ISel/loadstore2.ll @@ -0,0 +1,83 @@ +; ModuleID = 'loadstore2.c' +target datalayout = "E-m:m-p:32:32-i8:8:32-i16:16:32-i64:64-n32-S64" +target triple = "mips--linux-gnu" + +@c2 = common global i8 0, align 1 +@c1 = common global i8 0, align 1 +; RUN: llc -march=mipsel -relocation-model=pic -O0 -mips-fast-isel -fast-isel-abort -mcpu=mips32r2 \ +; RUN: < %s | FileCheck %s + +@s2 = common global i16 0, align 2 +@s1 = common global i16 0, align 2 +@i2 = common global i32 0, align 4 +@i1 = common global i32 0, align 4 +@f2 = common global float 0.000000e+00, align 4 +@f1 = common global float 0.000000e+00, align 4 +@d2 = common global double 0.000000e+00, align 8 +@d1 = common global double 0.000000e+00, align 8 + +; Function Attrs: nounwind +define void @cfoo() #0 { +entry: + %0 = load i8* @c2, align 1 + store i8 %0, i8* @c1, align 1 +; CHECK-LABEL: cfoo: +; CHECK: lbu $[[REGc:[0-9]+]], 0(${{[0-9]+}}) +; CHECK: sb $[[REGc]], 0(${{[0-9]+}}) + + + ret void +} + +; Function Attrs: nounwind +define void @sfoo() #0 { +entry: + %0 = load i16* @s2, align 2 + store i16 %0, i16* @s1, align 2 +; CHECK-LABEL: sfoo: +; CHECK: lhu $[[REGs:[0-9]+]], 0(${{[0-9]+}}) +; CHECK: sh $[[REGs]], 0(${{[0-9]+}}) + + ret void +} + +; Function Attrs: nounwind +define void @ifoo() #0 { +entry: + %0 = load i32* @i2, align 4 + store i32 %0, i32* @i1, align 4 +; CHECK-LABEL: ifoo: +; CHECK: lw $[[REGi:[0-9]+]], 0(${{[0-9]+}}) +; CHECK: sw $[[REGi]], 0(${{[0-9]+}}) + + ret void +} + +; Function Attrs: nounwind +define void @ffoo() #0 { +entry: + %0 = load float* @f2, align 4 + store float %0, float* @f1, align 4 +; CHECK-LABEL: ffoo: +; CHECK: lwc1 $f[[REGf:[0-9]+]], 0(${{[0-9]+}}) +; CHECK: swc1 $f[[REGf]], 0(${{[0-9]+}}) + + + ret void +} + +; Function Attrs: nounwind +define void @dfoo() #0 { +entry: + %0 = load double* @d2, align 8 + store double %0, double* @d1, align 8 +; CHECK-LABEL: dfoo: +; CHECK: ldc1 $f[[REGd:[0-9]+]], 0(${{[0-9]+}}) +; CHECK: sdc1 $f[[REGd]], 0(${{[0-9]+}}) +; CHECK: .end dfoo + ret void +} + +attributes #0 = { nounwind "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } + + |