commit 285cc289e8a7fd67ced37df2c80eecf1ae9ab1ff
author Zoran Jovanovic <zoran.jovanovic@imgtec.com> Fri Feb 28 18:22:56 2014 +0000
committer Zoran Jovanovic <zoran.jovanovic@imgtec.com> Fri Feb 28 18:22:56 2014 +0000
tree 3ce92b26549170863e3121ea10a28f679ec3d296
parent b4874f1a709465ff8bf596fc667140ded345e7bd

Fixed operand of SC microMIPS instruction.

llvm-svn: 202526

llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp

diff --git a/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp b/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
index c574f54..a543840 100644
--- a/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
+++ b/llvm/lib/Target/Mips/Disassembler/MipsDisassembler.cpp
@@ -611,6 +611,9 @@
   Reg = getReg(Decoder, Mips::GPR32RegClassID, Reg);
   Base = getReg(Decoder, Mips::GPR32RegClassID, Base);
 
+  if (Inst.getOpcode() == Mips::SC_MM)
+    Inst.addOperand(MCOperand::CreateReg(Reg));
+
   Inst.addOperand(MCOperand::CreateReg(Reg));
   Inst.addOperand(MCOperand::CreateReg(Base));
   Inst.addOperand(MCOperand::CreateImm(Offset));

llvm/lib/Target/Mips/MicroMipsInstrInfo.td

diff --git a/llvm/lib/Target/Mips/MicroMipsInstrInfo.td b/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
index 639e3de..4147405 100644
--- a/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
+++ b/llvm/lib/Target/Mips/MicroMipsInstrInfo.td
@@ -53,10 +53,11 @@
 }
 
 class SCBaseMM<string opstr, RegisterOperand RO> :
-  InstSE<(outs), (ins RO:$rt, mem_mm_12:$addr),
+  InstSE<(outs RO:$dst), (ins RO:$rt, mem_mm_12:$addr),
          !strconcat(opstr, "\t$rt, $addr"), [], NoItinerary, FrmI> {
   let DecoderMethod = "DecodeMemMMImm12";
   let mayStore = 1;
+  let Constraints = "$rt = $dst";
 }
 
 class LoadMM<string opstr, DAGOperand RO, SDPatternOperator OpNode = null_frag,

llvm/test/CodeGen/Mips/micromips-atomic.ll

diff --git a/llvm/test/CodeGen/Mips/micromips-atomic.ll b/llvm/test/CodeGen/Mips/micromips-atomic.ll
new file mode 100644
index 0000000..a50e0b7
--- /dev/null
+++ b/llvm/test/CodeGen/Mips/micromips-atomic.ll
@@ -0,0 +1,18 @@
+; RUN: llc %s -march=mipsel -mcpu=mips32r2 -mattr=micromips -filetype=asm \
+; RUN: -relocation-model=pic -o - | FileCheck %s
+
+@x = common global i32 0, align 4
+
+define i32 @AtomicLoadAdd32(i32 %incr) nounwind {
+entry:
+  %0 = atomicrmw add i32* @x, i32 %incr monotonic
+  ret i32 %0
+
+; CHECK-LABEL:   AtomicLoadAdd32:
+; CHECK:   lw      $[[R0:[0-9]+]], %got(x)
+; CHECK:   $[[BB0:[A-Z_0-9]+]]:
+; CHECK:   ll      $[[R1:[0-9]+]], 0($[[R0]])
+; CHECK:   addu    $[[R2:[0-9]+]], $[[R1]], $4
+; CHECK:   sc      $[[R2]], 0($[[R0]])
+; CHECK:   beqz    $[[R2]], $[[BB0]]
+}