From 97309af4f428d28d31f51adf69904ab302c928a2 Mon Sep 17 00:00:00 2001
From: Reed Kotler <rkotler@mips.com>
Date: Tue, 8 Oct 2013 17:32:33 +0000
Subject: [PATCH] Let rotr and bswap be handled by expansion for Mips16 since
 we don't have native instructions for this.

llvm-svn: 192207
---
 llvm/lib/Target/Mips/Mips16ISelLowering.cpp | 5 +++++
 llvm/test/CodeGen/Mips/bswap.ll             | 3 +++
 llvm/test/CodeGen/Mips/rotate.ll            | 5 +++++
 3 files changed, 13 insertions(+)

diff --git a/llvm/lib/Target/Mips/Mips16ISelLowering.cpp b/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
index ab649bd9882d..f0faca6d63cd 100644
--- a/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
+++ b/llvm/lib/Target/Mips/Mips16ISelLowering.cpp
@@ -145,6 +145,11 @@ Mips16TargetLowering::Mips16TargetLowering(MipsTargetMachine &TM)
   setOperationAction(ISD::ATOMIC_LOAD_UMIN,   MVT::i32,   Expand);
   setOperationAction(ISD::ATOMIC_LOAD_UMAX,   MVT::i32,   Expand);
 
+  setOperationAction(ISD::ROTR, MVT::i32,  Expand);
+  setOperationAction(ISD::ROTR, MVT::i64,  Expand);
+  setOperationAction(ISD::BSWAP, MVT::i32, Expand);
+  setOperationAction(ISD::BSWAP, MVT::i64, Expand);
+
   computeRegisterProperties();
 }
 
diff --git a/llvm/test/CodeGen/Mips/bswap.ll b/llvm/test/CodeGen/Mips/bswap.ll
index 0da2d2b7c28e..f17b91aab802 100644
--- a/llvm/test/CodeGen/Mips/bswap.ll
+++ b/llvm/test/CodeGen/Mips/bswap.ll
@@ -1,11 +1,13 @@
 ; RUN: llc  < %s -march=mipsel -mcpu=mips32r2 | FileCheck %s -check-prefix=MIPS32
 ; RUN: llc  < %s -march=mips64el -mcpu=mips64r2 | FileCheck %s -check-prefix=MIPS64
+; RUN: llc  < %s -mtriple=mipsel-linux-gnu -march=mipsel -mcpu=mips32r2 -mattr=+mips16 -soft-float -mips16-hard-float   | FileCheck %s -check-prefix=mips16 
 
 define i32 @bswap32(i32 %x) nounwind readnone {
 entry:
 ; MIPS32-LABEL: bswap32:
 ; MIPS32: wsbh $[[R0:[0-9]+]]
 ; MIPS32: rotr ${{[0-9]+}}, $[[R0]], 16
+; mips16: .ent bswap32
   %or.3 = call i32 @llvm.bswap.i32(i32 %x)
   ret i32 %or.3
 }
@@ -15,6 +17,7 @@ entry:
 ; MIPS64-LABEL: bswap64:
 ; MIPS64: dsbh $[[R0:[0-9]+]]
 ; MIPS64: dshd ${{[0-9]+}}, $[[R0]]
+; mips16: .ent bswap64
   %or.7 = call i64 @llvm.bswap.i64(i64 %x)
   ret i64 %or.7
 }
diff --git a/llvm/test/CodeGen/Mips/rotate.ll b/llvm/test/CodeGen/Mips/rotate.ll
index 4f3cfb7df41c..813bbdf18bbd 100644
--- a/llvm/test/CodeGen/Mips/rotate.ll
+++ b/llvm/test/CodeGen/Mips/rotate.ll
@@ -1,6 +1,8 @@
 ; RUN: llc -march=mips -mcpu=mips32r2 < %s | FileCheck %s
+; RUN: llc -mtriple=mipsel-linux-gnu -march=mipsel -mcpu=mips32r2 -mattr=+mips16 -soft-float -mips16-hard-float   < %s | FileCheck %s -check-prefix=mips16 
 
 ; CHECK:  rotrv $2, $4
+; mips16: .ent rot0
 define i32 @rot0(i32 %a, i32 %b) nounwind readnone {
 entry:
   %shl = shl i32 %a, %b
@@ -11,6 +13,7 @@ entry:
 }
 
 ; CHECK:  rotr  $2, $4, 22
+; mips16: .ent rot1
 define i32 @rot1(i32 %a) nounwind readnone {
 entry:
   %shl = shl i32 %a, 10
@@ -20,6 +23,7 @@ entry:
 }
 
 ; CHECK:  rotrv $2, $4, $5
+; mips16: .ent rot2
 define i32 @rot2(i32 %a, i32 %b) nounwind readnone {
 entry:
   %shr = lshr i32 %a, %b
@@ -30,6 +34,7 @@ entry:
 }
 
 ; CHECK:  rotr  $2, $4, 10
+; mips16: .ent rot3
 define i32 @rot3(i32 %a) nounwind readnone {
 entry:
   %shr = lshr i32 %a, 10