[mips][fastisel] ADJCALLSTACKUP has a second immediate operand.

[dsanders]

Summary

It's always zero for SelectionDAG and is never read by the MIPS backend so
do the same for FastISel.

[sdardis]

LGTM.

lib/Target/Mips/MipsFastISel.cpp

bool MipsFastISel::processCallArgs(CallLoweringInfo &CLI,
   }
 
   return true;
 }
 
 bool MipsFastISel::finishCall(CallLoweringInfo &CLI, MVT RetVT,
                               unsigned NumBytes) {
   CallingConv::ID CC = CLI.CallConv;
-  emitInst(Mips::ADJCALLSTACKUP).addImm(16);
+  emitInst(Mips::ADJCALLSTACKUP).addImm(16).addImm(0);
   if (RetVT != MVT::isVoid) {
     SmallVector<CCValAssign, 16> RVLocs;
     CCState CCInfo(CC, false, *FuncInfo.MF, RVLocs, *Context);
     CCInfo.AnalyzeCallResult(RetVT, RetCC_Mips);
 
     // Only handle a single return value.
     if (RVLocs.size() != 1)
       return false;

test/CodeGen/Mips/Fast-ISel/callabi.ll

-; RUN: llc -march=mipsel -mcpu=mips32 -O0 \
-; RUN:     -relocation-model=pic -fast-isel-abort=1 < %s | \
+; RUN: llc -march=mipsel -mcpu=mips32 -O0 -relocation-model=pic \
+; RUN:     -fast-isel-abort=1 -verify-machineinstrs < %s | \
 ; RUN:     FileCheck %s -check-prefix=ALL -check-prefix=32R1
-; RUN: llc -march=mipsel -mcpu=mips32r2 -O0 \
-; RUN:     -relocation-model=pic -fast-isel-abort=1 < %s | \
+; RUN: llc -march=mipsel -mcpu=mips32r2 -O0 -relocation-model=pic \
+; RUN:     -fast-isel-abort=1 -verify-machineinstrs < %s | \
 ; RUN:     FileCheck %s -check-prefix=ALL -check-prefix=32R2
 
 declare void @xb(i8)
 
 define void @cxb() {
   ; ALL-LABEL:    cxb:
 
   ; ALL:            addiu   $[[T0:[0-9]+]], $zero, 10

test/CodeGen/Mips/Fast-ISel/memtest1.ll

 ; RUN: llc < %s -march=mipsel -mcpu=mips32 -O0 -relocation-model=pic \
-; RUN:     -fast-isel-abort=1 | FileCheck %s \
+; RUN:     -fast-isel-abort=1 -verify-machineinstrs | FileCheck %s \
 ; RUN:     -check-prefix=ALL -check-prefix=32R1
 ; RUN: llc < %s -march=mipsel -mcpu=mips32r2 -O0 -relocation-model=pic \
-; RUN:     -fast-isel-abort=1 | FileCheck %s \
+; RUN:     -fast-isel-abort=1 -verify-machineinstrs | FileCheck %s \
 ; RUN:     -check-prefix=ALL -check-prefix=32R2
 
 @str = private unnamed_addr constant [12 x i8] c"hello there\00", align 1
 @src = global i8* getelementptr inbounds ([12 x i8], [12 x i8]* @str, i32 0, i32 0), align 4
 @i = global i32 12, align 4
 @dest = common global [50 x i8] zeroinitializer, align 1
 
 declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1)