Represent NEON load/store alignments in bytes, not bits.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@107701 91177308-0d34-0410-b5e6-96231b3b80d8

3 files changed, 13 insertions, 7 deletions

diff --git a/lib/Target/ARM/ARMAddressingModes.h b/lib/Target/ARM/ARMAddressingModes.h
index e68354a..d136afa 100644
--- a/lib/Target/ARM/ARMAddressingModes.h
+++ b/lib/Target/ARM/ARMAddressingModes.h
@@ -520,6 +520,8 @@ namespace ARM_AM {
   // This is stored in two operands [regaddr, align].  The first is the
   // address register.  The second operand is the value of the alignment
   // specifier to use or zero if no explicit alignment.
+  // Valid alignments are: 0, 8, 16, and 32 bytes, depending on the specific
+  // instruction.
 
 } // end namespace ARM_AM
 } // end namespace llvm
diff --git a/lib/Target/ARM/ARMBaseInstrInfo.cpp b/lib/Target/ARM/ARMBaseInstrInfo.cpp
index 2ec5ad4..f053e81 100644
--- a/lib/Target/ARM/ARMBaseInstrInfo.cpp
+++ b/lib/Target/ARM/ARMBaseInstrInfo.cpp
@@ -832,7 +832,7 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
     // FIXME: Neon instructions should support predicates
     if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
       AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VST1q))
-                     .addFrameIndex(FI).addImm(128)
+                     .addFrameIndex(FI).addImm(16)
                      .addReg(SrcReg, getKillRegState(isKill))
                      .addMemOperand(MMO));
     } else {
@@ -849,7 +849,7 @@ storeRegToStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       // FIXME: It's possible to only store part of the QQ register if the
       // spilled def has a sub-register index.
       MachineInstrBuilder MIB = BuildMI(MBB, I, DL, get(ARM::VST2q32))
-        .addFrameIndex(FI).addImm(128);
+        .addFrameIndex(FI).addImm(16);
       MIB = AddDReg(MIB, SrcReg, ARM::dsub_0, getKillRegState(isKill), TRI);
       MIB = AddDReg(MIB, SrcReg, ARM::dsub_1, 0, TRI);
       MIB = AddDReg(MIB, SrcReg, ARM::dsub_2, 0, TRI);
@@ -929,7 +929,7 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
   case ARM::QPR_8RegClassID:
     if (Align >= 16 && getRegisterInfo().canRealignStack(MF)) {
       AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VLD1q), DestReg)
-                     .addFrameIndex(FI).addImm(128)
+                     .addFrameIndex(FI).addImm(16)
                      .addMemOperand(MMO));
     } else {
       AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VLDMQ), DestReg)
@@ -946,7 +946,7 @@ loadRegFromStackSlot(MachineBasicBlock &MBB, MachineBasicBlock::iterator I,
       MIB = AddDReg(MIB, DestReg, ARM::dsub_1, RegState::Define, TRI);
       MIB = AddDReg(MIB, DestReg, ARM::dsub_2, RegState::Define, TRI);
       MIB = AddDReg(MIB, DestReg, ARM::dsub_3, RegState::Define, TRI);
-      AddDefaultPred(MIB.addFrameIndex(FI).addImm(128).addMemOperand(MMO));
+      AddDefaultPred(MIB.addFrameIndex(FI).addImm(16).addMemOperand(MMO));
     } else {
       MachineInstrBuilder MIB =
         AddDefaultPred(BuildMI(MBB, I, DL, get(ARM::VLDMD))
@@ -1131,7 +1131,7 @@ foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
       if (MFI.getObjectAlignment(FI) >= 16 &&
           getRegisterInfo().canRealignStack(MF)) {
         NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::VST1q))
-          .addFrameIndex(FI).addImm(128)
+          .addFrameIndex(FI).addImm(16)
           .addReg(SrcReg,
                   getKillRegState(isKill) | getUndefRegState(isUndef),
                   SrcSubReg)
@@ -1157,7 +1157,7 @@ foldMemoryOperandImpl(MachineFunction &MF, MachineInstr *MI,
                   getDeadRegState(isDead) |
                   getUndefRegState(isUndef),
                   DstSubReg)
-          .addFrameIndex(FI).addImm(128).addImm(Pred).addReg(PredReg);
+          .addFrameIndex(FI).addImm(16).addImm(Pred).addReg(PredReg);
       } else {
         NewMI = BuildMI(MF, MI->getDebugLoc(), get(ARM::VLDMQ))
           .addReg(DstReg,
diff --git a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
index df87e70..cd28dfa 100644
--- a/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
+++ b/lib/Target/ARM/AsmPrinter/ARMAsmPrinter.cpp
@@ -602,8 +602,12 @@ void ARMAsmPrinter::printAddrMode6Operand(const MachineInstr *MI, int Op,
 
   O << "[" << getRegisterName(MO1.getReg());
   if (MO2.getImm()) {
+    unsigned Align = MO2.getImm();
+    assert((Align == 8 || Align == 16 || Align == 32) &&
+           "unexpected NEON load/store alignment");
+    Align <<= 3;
     // FIXME: Both darwin as and GNU as violate ARM docs here.
-    O << ", :" << MO2.getImm();
+    O << ", :" << Align;
   }
   O << "]";
 }