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-rw-r--r--lib/Target/ARM/ARMISelLowering.cpp5
-rw-r--r--lib/Target/ARM/ARMInstrInfo.td22
-rw-r--r--lib/Target/ARM/ARMInstrThumb2.td49
-rw-r--r--lib/Target/ARM/Disassembler/ARMDisassembler.cpp12
-rw-r--r--lib/Target/ARM/Disassembler/ThumbDisassemblerCore.h6
-rw-r--r--test/CodeGen/ARM/prefetch.ll64
6 files changed, 111 insertions, 47 deletions
diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 6503960de9..b816e66f7d 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -598,6 +598,11 @@ ARMTargetLowering::ARMTargetLowering(TargetMachine &TM)
setOperationAction(ISD::ATOMIC_LOAD_XOR, MVT::i64, Expand);
setOperationAction(ISD::ATOMIC_LOAD_NAND, MVT::i64, Expand);
+ // ARM v5TE+ and Thumb2 has preload instructions.
+ if (Subtarget->isThumb2() ||
+ (!Subtarget->isThumb1Only() && Subtarget->hasV5TEOps()))
+ setOperationAction(ISD::PREFETCH, MVT::Other, Legal);
+
// Requires SXTB/SXTH, available on v6 and up in both ARM and Thumb modes.
if (!Subtarget->hasV6Ops()) {
setOperationAction(ISD::SIGN_EXTEND_INREG, MVT::i16, Expand);
diff --git a/lib/Target/ARM/ARMInstrInfo.td b/lib/Target/ARM/ARMInstrInfo.td
index b3301656d2..71557c9864 100644
--- a/lib/Target/ARM/ARMInstrInfo.td
+++ b/lib/Target/ARM/ARMInstrInfo.td
@@ -991,17 +991,18 @@ def CPS : AXI<(outs), (ins cps_opt:$opt), MiscFrm, NoItinerary, "cps$opt",
//
// A8.6.117, A8.6.118. Different instructions are generated for #0 and #-0.
// The neg_zero operand translates -0 to -1, -1 to -2, ..., etc.
-multiclass APreLoad<bit data, bit read, string opc> {
+multiclass APreLoad<bits<2> data_read, string opc> {
def i12 : AXI<(outs), (ins addrmode_imm12:$addr), MiscFrm, NoItinerary,
- !strconcat(opc, "\t$addr"), []> {
+ !strconcat(opc, "\t$addr"),
+ [(prefetch addrmode_imm12:$addr, imm, (i32 data_read))]> {
bits<4> Rt;
bits<17> addr;
let Inst{31-26} = 0b111101;
let Inst{25} = 0; // 0 for immediate form
- let Inst{24} = data;
+ let Inst{24} = data_read{1};
let Inst{23} = addr{12}; // U (add = ('U' == 1))
- let Inst{22} = read;
+ let Inst{22} = data_read{0};
let Inst{21-20} = 0b01;
let Inst{19-16} = addr{16-13}; // Rn
let Inst{15-12} = Rt;
@@ -1009,23 +1010,24 @@ multiclass APreLoad<bit data, bit read, string opc> {
}
def rs : AXI<(outs), (ins ldst_so_reg:$shift), MiscFrm, NoItinerary,
- !strconcat(opc, "\t$shift"), []> {
+ !strconcat(opc, "\t$shift"),
+ [(prefetch ldst_so_reg:$shift, imm, (i32 data_read))]> {
bits<4> Rt;
bits<17> shift;
let Inst{31-26} = 0b111101;
let Inst{25} = 1; // 1 for register form
- let Inst{24} = data;
+ let Inst{24} = data_read{1};
let Inst{23} = shift{12}; // U (add = ('U' == 1))
- let Inst{22} = read;
+ let Inst{22} = data_read{0};
let Inst{21-20} = 0b01;
let Inst{19-16} = shift{16-13}; // Rn
let Inst{11-0} = shift{11-0};
}
}
-defm PLD : APreLoad<1, 1, "pld">;
-defm PLDW : APreLoad<1, 0, "pldw">;
-defm PLI : APreLoad<0, 1, "pli">;
+defm PLD : APreLoad<3, "pld">;
+defm PLDW : APreLoad<2, "pldw">;
+defm PLI : APreLoad<1, "pli">;
def SETEND : AXI<(outs),(ins setend_op:$end), MiscFrm, NoItinerary,
"setend\t$end",
diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index 824d935cf1..44724111bb 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -610,6 +610,8 @@ multiclass T2I_ld<bit signed, bits<2> opcod, string opc,
let Inst{20} = 1; // load
let Inst{11-6} = 0b000000;
}
+
+ // FIXME: Is the pci variant actually needed?
def pci : T2Ipc <(outs GPR:$dst), (ins i32imm:$addr), iii,
opc, ".w\t$dst, $addr",
[(set GPR:$dst, (opnode (ARMWrapper tconstpool:$addr)))]> {
@@ -1172,10 +1174,11 @@ def t2STRD_POST : T2Ii8s4<0, 1, 0, (outs),
//
// A8.6.117, A8.6.118. Different instructions are generated for #0 and #-0.
// The neg_zero operand translates -0 to -1, -1 to -2, ..., etc.
-multiclass T2Ipl<bit instr, bit write, string opc> {
+multiclass T2Ipl<bit instr, bit write, bits<2> data_read, string opc> {
- def i12 : T2I<(outs), (ins GPR:$base, i32imm:$imm), IIC_iLoad_i, opc,
- "\t[$base, $imm]", []> {
+ def i12 : T2Ii12<(outs), (ins t2addrmode_imm12:$addr), IIC_iLoad_i, opc,
+ "\t$addr",
+ [(prefetch t2addrmode_imm12:$addr, imm, (i32 data_read))]> {
let Inst{31-25} = 0b1111100;
let Inst{24} = instr;
let Inst{23} = 1; // U = 1
@@ -1185,8 +1188,9 @@ multiclass T2Ipl<bit instr, bit write, string opc> {
let Inst{15-12} = 0b1111;
}
- def i8 : T2I<(outs), (ins GPR:$base, neg_zero:$imm), IIC_iLoad_i, opc,
- "\t[$base, $imm]", []> {
+ def i8 : T2Ii8<(outs), (ins t2addrmode_imm8:$addr), IIC_iLoad_i, opc,
+ "\t$addr",
+ [(prefetch t2addrmode_imm8:$addr, imm, (i32 data_read))]> {
let Inst{31-25} = 0b1111100;
let Inst{24} = instr;
let Inst{23} = 0; // U = 0
@@ -1197,21 +1201,9 @@ multiclass T2Ipl<bit instr, bit write, string opc> {
let Inst{11-8} = 0b1100;
}
- let isCodeGenOnly = 1 in // $base doesn't exist in asmstring?
- def pci : T2I<(outs), (ins GPR:$base, neg_zero:$imm), IIC_iLoad_i, opc,
- "\t[pc, $imm]", []> {
- let Inst{31-25} = 0b1111100;
- let Inst{24} = instr;
- let Inst{23} = ?; // add = (U == 1)
- let Inst{22} = 0;
- let Inst{21} = write;
- let Inst{20} = 1;
- let Inst{19-16} = 0b1111; // Rn = 0b1111
- let Inst{15-12} = 0b1111;
- }
-
- def r : T2I<(outs), (ins GPR:$base, GPR:$a), IIC_iLoad_i, opc,
- "\t[$base, $a]", []> {
+ def s : T2Iso<(outs), (ins t2addrmode_so_reg:$addr), IIC_iLoad_i, opc,
+ "\t$addr",
+ [(prefetch t2addrmode_so_reg:$addr, imm, (i32 data_read))]> {
let Inst{31-25} = 0b1111100;
let Inst{24} = instr;
let Inst{23} = 0; // add = TRUE for T1
@@ -1220,25 +1212,26 @@ multiclass T2Ipl<bit instr, bit write, string opc> {
let Inst{20} = 1;
let Inst{15-12} = 0b1111;
let Inst{11-6} = 0000000;
- let Inst{5-4} = 0b00; // no shift is applied
}
- def s : T2I<(outs), (ins GPR:$base, GPR:$a, i32imm:$shamt), IIC_iLoad_i, opc,
- "\t[$base, $a, lsl $shamt]", []> {
+ let isCodeGenOnly = 1 in
+ def pci : T2Ipc<(outs), (ins i32imm:$addr), IIC_iLoad_i, opc,
+ "\t$addr",
+ []> {
let Inst{31-25} = 0b1111100;
let Inst{24} = instr;
- let Inst{23} = 0; // add = TRUE for T1
+ let Inst{23} = ?; // add = (U == 1)
let Inst{22} = 0;
let Inst{21} = write;
let Inst{20} = 1;
+ let Inst{19-16} = 0b1111; // Rn = 0b1111
let Inst{15-12} = 0b1111;
- let Inst{11-6} = 0000000;
}
}
-defm t2PLD : T2Ipl<0, 0, "pld">;
-defm t2PLDW : T2Ipl<0, 1, "pldw">;
-defm t2PLI : T2Ipl<1, 0, "pli">;
+defm t2PLD : T2Ipl<0, 0, 3, "pld">;
+defm t2PLDW : T2Ipl<0, 1, 2, "pldw">;
+defm t2PLI : T2Ipl<1, 0, 1, "pli">;
//===----------------------------------------------------------------------===//
// Load / store multiple Instructions.
diff --git a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
index 6d37bc70a1..abdcf8161a 100644
--- a/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
+++ b/lib/Target/ARM/Disassembler/ARMDisassembler.cpp
@@ -355,11 +355,11 @@ static inline bool Thumb2PreloadOpcodeNoPCI(unsigned Opcode) {
default:
return false;
case ARM::t2PLDi12: case ARM::t2PLDi8:
- case ARM::t2PLDr: case ARM::t2PLDs:
+ case ARM::t2PLDs:
case ARM::t2PLDWi12: case ARM::t2PLDWi8:
- case ARM::t2PLDWr: case ARM::t2PLDWs:
+ case ARM::t2PLDWs:
case ARM::t2PLIi12: case ARM::t2PLIi8:
- case ARM::t2PLIr: case ARM::t2PLIs:
+ case ARM::t2PLIs:
return true;
}
}
@@ -369,13 +369,13 @@ static inline unsigned T2Morph2Preload2PCI(unsigned Opcode) {
default:
return 0;
case ARM::t2PLDi12: case ARM::t2PLDi8:
- case ARM::t2PLDr: case ARM::t2PLDs:
+ case ARM::t2PLDs:
return ARM::t2PLDpci;
case ARM::t2PLDWi12: case ARM::t2PLDWi8:
- case ARM::t2PLDWr: case ARM::t2PLDWs:
+ case ARM::t2PLDWs:
return ARM::t2PLDWpci;
case ARM::t2PLIi12: case ARM::t2PLIi8:
- case ARM::t2PLIr: case ARM::t2PLIs:
+ case ARM::t2PLIs:
return ARM::t2PLIpci;
}
}
diff --git a/lib/Target/ARM/Disassembler/ThumbDisassemblerCore.h b/lib/Target/ARM/Disassembler/ThumbDisassemblerCore.h
index 4f605e6833..6ed2949421 100644
--- a/lib/Target/ARM/Disassembler/ThumbDisassemblerCore.h
+++ b/lib/Target/ARM/Disassembler/ThumbDisassemblerCore.h
@@ -1731,11 +1731,11 @@ static inline bool Thumb2PreloadOpcode(unsigned Opcode) {
default:
return false;
case ARM::t2PLDi12: case ARM::t2PLDi8: case ARM::t2PLDpci:
- case ARM::t2PLDr: case ARM::t2PLDs:
+ case ARM::t2PLDs:
case ARM::t2PLDWi12: case ARM::t2PLDWi8: case ARM::t2PLDWpci:
- case ARM::t2PLDWr: case ARM::t2PLDWs:
+ case ARM::t2PLDWs:
case ARM::t2PLIi12: case ARM::t2PLIi8: case ARM::t2PLIpci:
- case ARM::t2PLIr: case ARM::t2PLIs:
+ case ARM::t2PLIs:
return true;
}
}
diff --git a/test/CodeGen/ARM/prefetch.ll b/test/CodeGen/ARM/prefetch.ll
new file mode 100644
index 0000000000..dbc1002e50
--- /dev/null
+++ b/test/CodeGen/ARM/prefetch.ll
@@ -0,0 +1,64 @@
+; RUN: llc < %s -march=thumb -mattr=-thumb2 | not grep pld
+; RUN: llc < %s -march=thumb -mattr=+thumb2 | FileCheck %s -check-prefix=THUMB2
+; RUN: llc < %s -march=arm -mattr=+v5te | FileCheck %s -check-prefix=ARM
+; rdar://8601536
+
+define void @t1(i8* %ptr) nounwind {
+entry:
+; ARM: t1:
+; ARM: pli [r0]
+; ARM: pldw [r0]
+; ARM: pld [r0]
+
+; THUMB2: t1:
+; THUMB2: pli [r0]
+; THUMB2: pldw [r0]
+; THUMB2: pld [r0]
+ tail call void @llvm.prefetch( i8* %ptr, i32 0, i32 1 )
+ tail call void @llvm.prefetch( i8* %ptr, i32 0, i32 2 )
+ tail call void @llvm.prefetch( i8* %ptr, i32 0, i32 3 )
+ ret void
+}
+
+define void @t2(i8* %ptr) nounwind {
+entry:
+; ARM: t2:
+; ARM: pld [r0, #1023]
+
+; THUMB2: t2:
+; THUMB2: pld [r0, #1023]
+ %tmp = getelementptr i8* %ptr, i32 1023
+ tail call void @llvm.prefetch( i8* %tmp, i32 0, i32 3 )
+ ret void
+}
+
+define void @t3(i32 %base, i32 %offset) nounwind {
+entry:
+; ARM: t3:
+; ARM: pld [r0, r1, lsr #2]
+
+; THUMB2: t3:
+; THUMB2: lsrs r1, r1, #2
+; THUMB2: pld [r0, r1]
+ %tmp1 = lshr i32 %offset, 2
+ %tmp2 = add i32 %base, %tmp1
+ %tmp3 = inttoptr i32 %tmp2 to i8*
+ tail call void @llvm.prefetch( i8* %tmp3, i32 0, i32 3 )
+ ret void
+}
+
+define void @t4(i32 %base, i32 %offset) nounwind {
+entry:
+; ARM: t4:
+; ARM: pld [r0, r1, lsl #2]
+
+; THUMB2: t4:
+; THUMB2: pld [r0, r1, lsl #2]
+ %tmp1 = shl i32 %offset, 2
+ %tmp2 = add i32 %base, %tmp1
+ %tmp3 = inttoptr i32 %tmp2 to i8*
+ tail call void @llvm.prefetch( i8* %tmp3, i32 0, i32 3 )
+ ret void
+}
+
+declare void @llvm.prefetch(i8*, i32, i32) nounwind
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 22:23:18 +0000