[llvm] r227003 - [mips] Fix assertion on i128 addition/subtraction on MIPS64
Daniel Sanders
daniel.sanders at imgtec.com
Sat Jan 24 04:58:11 PST 2015
Author: dsanders
Date: Sat Jan 24 06:58:10 2015
New Revision: 227003
URL: http://llvm.org/viewvc/llvm-project?rev=227003&view=rev
Log:
[mips] Fix assertion on i128 addition/subtraction on MIPS64
Summary:
In addition to the included tests, this fixes
test/CodeGen/Generic/i128-addsub.ll on a mips64 host.
Reviewers: atanasyan, sagar, vmedic
Reviewed By: vmedic
Subscribers: sdkie, llvm-commits
Differential Revision: http://reviews.llvm.org/D6610
Added:
llvm/trunk/test/CodeGen/Mips/llvm-ir/add.ll
llvm/trunk/test/CodeGen/Mips/llvm-ir/sub.ll
Modified:
llvm/trunk/lib/Target/Mips/Mips64InstrInfo.td
llvm/trunk/lib/Target/Mips/MipsSEISelDAGToDAG.cpp
Modified: llvm/trunk/lib/Target/Mips/Mips64InstrInfo.td
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/Mips64InstrInfo.td?rev=227003&r1=227002&r2=227003&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/Mips64InstrInfo.td (original)
+++ llvm/trunk/lib/Target/Mips/Mips64InstrInfo.td Sat Jan 24 06:58:10 2015
@@ -423,6 +423,16 @@ def VMULU : ArithLogicR<"vmulu", GPR64Op
// Arbitrary patterns that map to one or more instructions
//===----------------------------------------------------------------------===//
+// Add/sub with carry
+def : MipsPat<(subc GPR64:$lhs, GPR64:$rhs),
+ (DSUBu GPR64:$lhs, GPR64:$rhs)>, ISA_MIPS3;
+let AdditionalPredicates = [NotDSP] in {
+ def : MipsPat<(addc GPR64:$lhs, GPR64:$rhs),
+ (DADDu GPR64:$lhs, GPR64:$rhs)>, ISA_MIPS3;
+ def : MipsPat<(addc GPR64:$src, immSExt16:$imm),
+ (DADDiu GPR64:$src, imm:$imm)>, ISA_MIPS3;
+}
+
// extended loads
def : MipsPat<(i64 (extloadi1 addr:$src)), (LB64 addr:$src)>;
def : MipsPat<(i64 (extloadi8 addr:$src)), (LB64 addr:$src)>;
Modified: llvm/trunk/lib/Target/Mips/MipsSEISelDAGToDAG.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/Mips/MipsSEISelDAGToDAG.cpp?rev=227003&r1=227002&r2=227003&view=diff
==============================================================================
--- llvm/trunk/lib/Target/Mips/MipsSEISelDAGToDAG.cpp (original)
+++ llvm/trunk/lib/Target/Mips/MipsSEISelDAGToDAG.cpp Sat Jan 24 06:58:10 2015
@@ -240,9 +240,27 @@ SDNode *MipsSEDAGToDAGISel::selectAddESu
SDValue LHS = Node->getOperand(0), RHS = Node->getOperand(1);
EVT VT = LHS.getValueType();
- SDNode *Carry = CurDAG->getMachineNode(Mips::SLTu, DL, VT, Ops);
- SDNode *AddCarry = CurDAG->getMachineNode(Mips::ADDu, DL, VT,
- SDValue(Carry, 0), RHS);
+ unsigned SltOp = Mips::SLTu;
+ unsigned AddOp = Mips::ADDu;
+ if (VT == MVT::i64) {
+ SltOp = Mips::SLTu64;
+ AddOp = Mips::DADDu;
+ }
+
+ SDValue Carry = SDValue(CurDAG->getMachineNode(SltOp, DL, VT, Ops), 0);
+ if (SltOp == Mips::SLTu64) {
+ // On 64-bit targets, sltu produces an i64 but our backend currently says
+ // that SLTu64 produces an i32. We need to fix this in the long run but for
+ // now, just make the DAG type-correct by asserting the upper bits are zero.
+ Carry = SDValue(CurDAG->getMachineNode(
+ Mips::SUBREG_TO_REG, DL, VT,
+ CurDAG->getTargetConstant(0, VT), Carry,
+ CurDAG->getTargetConstant(Mips::sub_32, MVT::i32)),
+ 0);
+ }
+
+ SDNode *AddCarry = CurDAG->getMachineNode(AddOp, DL, VT, Carry, RHS);
+
return CurDAG->SelectNodeTo(Node, MOp, VT, MVT::Glue, LHS,
SDValue(AddCarry, 0));
}
@@ -641,7 +659,9 @@ std::pair<bool, SDNode*> MipsSEDAGToDAGI
case ISD::SUBE: {
SDValue InFlag = Node->getOperand(2);
- Result = selectAddESubE(Mips::SUBu, InFlag, InFlag.getOperand(0), DL, Node);
+ unsigned SubOp =
+ Node->getValueType(0) == MVT::i64 ? Mips::DSUBu : Mips::SUBu;
+ Result = selectAddESubE(SubOp, InFlag, InFlag.getOperand(0), DL, Node);
return std::make_pair(true, Result);
}
@@ -649,7 +669,9 @@ std::pair<bool, SDNode*> MipsSEDAGToDAGI
if (Subtarget->hasDSP()) // Select DSP instructions, ADDSC and ADDWC.
break;
SDValue InFlag = Node->getOperand(2);
- Result = selectAddESubE(Mips::ADDu, InFlag, InFlag.getValue(0), DL, Node);
+ unsigned AddOp =
+ Node->getValueType(0) == MVT::i64 ? Mips::DADDu : Mips::ADDu;
+ Result = selectAddESubE(AddOp, InFlag, InFlag.getValue(0), DL, Node);
return std::make_pair(true, Result);
}
Added: llvm/trunk/test/CodeGen/Mips/llvm-ir/add.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/llvm-ir/add.ll?rev=227003&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/llvm-ir/add.ll (added)
+++ llvm/trunk/test/CodeGen/Mips/llvm-ir/add.ll Sat Jan 24 06:58:10 2015
@@ -0,0 +1,95 @@
+; RUN: llc < %s -march=mips -mcpu=mips2 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-32BIT -check-prefix=M2
+; RUN: llc < %s -march=mips -mcpu=mips32 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-32BIT -check-prefix=32R1-R2 -check-prefix=32R1
+; RUN: llc < %s -march=mips -mcpu=mips32r2 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-32BIT -check-prefix=32R1-R2 -check-prefix=32R2
+; RUN: llc < %s -march=mips -mcpu=mips32r6 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-32BIT -check-prefix=32R6
+; RUN: llc < %s -march=mips64 -mcpu=mips4 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-64BIT -check-prefix=M4
+; RUN: llc < %s -march=mips64 -mcpu=mips64 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-64BIT -check-prefix=64R1-R2
+; RUN: llc < %s -march=mips64 -mcpu=mips64r2 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-64BIT -check-prefix=64R1-R2
+; RUN: llc < %s -march=mips64 -mcpu=mips64r6 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-64BIT -check-prefix=64R6
+
+; FIXME: We should be able to have signext on the return value without incurring
+; a sign extend.
+define i8 @add_i8(i8 signext %a, i8 signext %b) {
+entry:
+; ALL-LABEL: add_i8:
+
+; ALL: addu $2, $4, $5
+
+ %r = add i8 %a, %b
+ ret i8 %r
+}
+
+; FIXME: We should be able to have signext on the return value without incurring
+; a sign extend.
+define i16 @add_i16(i16 signext %a, i16 signext %b) {
+entry:
+; ALL-LABEL: add_i16:
+
+; ALL: addu $2, $4, $5
+
+ %r = add i16 %a, %b
+ ret i16 %r
+}
+
+define signext i32 @add_i32(i32 signext %a, i32 signext %b) {
+entry:
+; ALL-LABEL: add_i32:
+
+; ALL: addu $2, $4, $5
+
+ %r = add i32 %a, %b
+ ret i32 %r
+}
+
+define signext i64 @add_i64(i64 signext %a, i64 signext %b) {
+entry:
+; ALL-LABEL: add_i64:
+
+; ALL-32BIT-DAG: addu [[R1:\$3]], $5, $7
+; ALL-32BIT-DAG: sltu [[T0:\$[0-9]+]], [[R1]], $7
+; ALL-32BIT-DAG: addu [[T1:\$[0-9]+]], [[T0]], $6
+; ALL-32BIT-DAG: addu $2, $4, [[T1]]
+
+; ALL-64BIT: daddu $2, $4, $5
+
+ %r = add i64 %a, %b
+ ret i64 %r
+}
+
+define signext i128 @add_i128(i128 signext %a, i128 signext %b) {
+entry:
+; ALL-LABEL: add_i128:
+
+; ALL-32BIT-DAG: lw [[A3:\$[0-9]+]], 28($sp)
+; ALL-32BIT-DAG: addu [[T0:\$[0-9]+]], $7, [[A3]]
+; ALL-32BIT-DAG: sltu [[T1:\$[0-9]+]], [[T0]], [[A3]]
+; ALL-32BIT-DAG: lw [[A2:\$[0-9]+]], 24($sp)
+; ALL-32BIT-DAG: addu [[T2:\$[0-9]+]], [[T1]], [[A2]]
+; ALL-32BIT-DAG: addu [[T3:\$[0-9]+]], $6, [[T2]]
+; ALL-32BIT-DAG: sltu [[T4:\$[0-9]+]], [[T3]], [[A2]]
+; ALL-32BIT-DAG: lw [[A1:\$[0-9]+]], 20($sp)
+; ALL-32BIT-DAG: addu [[T5:\$[0-9]+]], [[T4]], [[A1]]
+; ALL-32BIT-DAG: lw [[A0:\$[0-9]+]], 16($sp)
+; ALL-32BIT-DAG: addu [[R1:\$3]], [[R3:\$5]], [[T5]]
+; ALL-32BIT-DAG: sltu [[T6:\$[0-9]+]], [[R1]], [[A1]]
+; ALL-32BIT-DAG: addu [[T7:\$[0-9]+]], [[T6]], [[A0]]
+; ALL-32BIT-DAG: addu $2, [[R2:\$4]], [[T7]]
+; ALL-32BIT-DAG: move [[R2]], [[T3]]
+; ALL-32BIT-DAG: move [[R3]], [[T0]]
+
+; ALL-64BIT-DAG: daddu [[R0:\$3]], $5, $7
+; ALL-64BIT-DAG: sltu [[T1:\$[0-9]+]], [[R0]], $7
+; ALL-64BIT-DAG: daddu [[T2:\$[0-9]+]], [[T1]], $6
+; ALL-64BIT-DAG: daddu $2, $4, [[T2]]
+
+ %r = add i128 %a, %b
+ ret i128 %r
+}
Added: llvm/trunk/test/CodeGen/Mips/llvm-ir/sub.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/Mips/llvm-ir/sub.ll?rev=227003&view=auto
==============================================================================
--- llvm/trunk/test/CodeGen/Mips/llvm-ir/sub.ll (added)
+++ llvm/trunk/test/CodeGen/Mips/llvm-ir/sub.ll Sat Jan 24 06:58:10 2015
@@ -0,0 +1,94 @@
+; RUN: llc < %s -march=mips -mcpu=mips2 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-32BIT -check-prefix=M2
+; RUN: llc < %s -march=mips -mcpu=mips32 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-32BIT -check-prefix=32R1-R2 -check-prefix=32R1
+; RUN: llc < %s -march=mips -mcpu=mips32r2 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-32BIT -check-prefix=32R1-R2 -check-prefix=32R2
+; RUN: llc < %s -march=mips -mcpu=mips32r6 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-32BIT -check-prefix=32R6
+; RUN: llc < %s -march=mips64 -mcpu=mips4 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-64BIT -check-prefix=M4
+; RUN: llc < %s -march=mips64 -mcpu=mips64 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-64BIT -check-prefix=64R1-R2
+; RUN: llc < %s -march=mips64 -mcpu=mips64r2 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-64BIT -check-prefix=64R1-R2
+; RUN: llc < %s -march=mips64 -mcpu=mips64r6 | FileCheck %s \
+; RUN: -check-prefix=ALL -check-prefix=ALL-64BIT -check-prefix=64R6
+
+; FIXME: We should be able to have signext on the return value without incurring
+; a sign extend.
+define i8 @sub_i8(i8 signext %a, i8 signext %b) {
+entry:
+; ALL-LABEL: sub_i8:
+
+; ALL: subu $2, $4, $5
+
+ %r = sub i8 %a, %b
+ ret i8 %r
+}
+
+; FIXME: We should be able to have signext on the return value without incurring
+; a sign extend.
+define i16 @sub_i16(i16 signext %a, i16 signext %b) {
+entry:
+; ALL-LABEL: sub_i16:
+
+; ALL: subu $2, $4, $5
+
+ %r = sub i16 %a, %b
+ ret i16 %r
+}
+
+define signext i32 @sub_i32(i32 signext %a, i32 signext %b) {
+entry:
+; ALL-LABEL: sub_i32:
+
+; ALL: subu $2, $4, $5
+
+ %r = sub i32 %a, %b
+ ret i32 %r
+}
+
+define signext i64 @sub_i64(i64 signext %a, i64 signext %b) {
+entry:
+; ALL-LABEL: sub_i64:
+
+; ALL-32BIT-DAG: subu [[R1:\$3]], $5, $7
+; ALL-32BIT-DAG: sltu [[T0:\$[0-9]+]], $5, $7
+; ALL-32BIT-DAG: addu [[T1:\$[0-9]+]], [[T0]], $6
+; ALL-32BIT-DAG: subu $2, $4, [[T1]]
+
+; ALL-64BIT: dsubu $2, $4, $5
+
+ %r = sub i64 %a, %b
+ ret i64 %r
+}
+
+define signext i128 @sub_i128(i128 signext %a, i128 signext %b) {
+entry:
+; ALL-LABEL: sub_i128:
+
+; ALL-32BIT-DAG: lw [[A1:\$[0-9]+]], 20($sp)
+; ALL-32BIT-DAG: sltu [[T0:\$[0-9]+]], $5, [[A1]]
+; ALL-32BIT-DAG: lw [[A0:\$[0-9]+]], 16($sp)
+; ALL-32BIT-DAG: addu [[T1:\$[0-9]+]], [[T0]], [[A0]]
+; ALL-32BIT-DAG: lw [[A2:\$[0-9]+]], 24($sp)
+; ALL-32BIT-DAG: lw [[A3:\$[0-9]+]], 28($sp)
+; ALL-32BIT-DAG: subu [[T2:\$[0-9]+]], $7, [[A3]]
+; ALL-32BIT-DAG: subu $2, $4, [[T1]]
+; ALL-32BIT-DAG: sltu [[T3:\$[0-9]+]], $6, [[A2]]
+; ALL-32BIT-DAG: addu [[T4:\$[0-9]+]], [[T3]], [[A1]]
+; ALL-32BIT-DAG: subu $3, $5, [[T4]]
+; ALL-32BIT-DAG: sltu [[T5:\$[0-9]+]], $7, [[A3]]
+; ALL-32BIT-DAG: addu [[T6:\$[0-9]+]], [[T5]], [[A2]]
+; ALL-32BIT-DAG: subu $4, $6, [[T6]]
+; ALL-32BIT-DAG: move $5, [[T2]]
+
+; ALL-64BIT-DAG: dsubu $3, $5, $7
+; ALL-64BIT-DAG: sltu [[T1:\$[0-9]+]], $5, $7
+; ALL-64BIT-DAG: daddu [[T2:\$[0-9]+]], [[T1]], $6
+; ALL-64BIT-DAG: dsubu $2, $4, [[T2]]
+
+ %r = sub i128 %a, %b
+ ret i128 %r
+}
More information about the llvm-commits
mailing list