From 116cc72ed46500eab12fa8e0833d9bb194fcdc2b Mon Sep 17 00:00:00 2001
From: Weiming Zhao <weimingz@codeaurora.org>
Date: Sun, 20 Dec 2015 06:41:44 +0000
Subject: [PATCH] Fix mapping of @llvm.arm.ssat/usat intrinsics to ssat/usat
 instructions for Thumb2

Summary:
r250697 fixed the mapping for ARM mode. We have to do the same for Thumb2 otherwise the same llvm.arm.ssat() will generate different saturating amount for ARM and Thumb.

r250697: http://reviews.llvm.org/rL250697

Reviewers: rmaprath

Subscribers: aemerson, llvm-commits, rengolin

Differential Revision: http://reviews.llvm.org/D15653

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@256115 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Target/ARM/ARMInstrThumb2.td |  4 ++--
 test/CodeGen/ARM/sat-arith.ll    | 25 ++++++++++++++-----------
 test/CodeGen/ARM/ssat-lower.ll   |  1 +
 test/CodeGen/ARM/ssat-upper.ll   |  1 +
 test/CodeGen/ARM/usat-lower.ll   |  1 +
 test/CodeGen/ARM/usat-upper.ll   |  1 +
 6 files changed, 20 insertions(+), 13 deletions(-)

diff --git a/lib/Target/ARM/ARMInstrThumb2.td b/lib/Target/ARM/ARMInstrThumb2.td
index f43f5ba7fe6..d460d33fa0a 100644
--- a/lib/Target/ARM/ARMInstrThumb2.td
+++ b/lib/Target/ARM/ARMInstrThumb2.td
@@ -2291,8 +2291,8 @@ def t2USAT16: T2SatI<(outs rGPR:$Rd), (ins imm0_15:$sat_imm, rGPR:$Rn),
   let Inst{5-4} = 0b00;
 }
 
-def : T2Pat<(int_arm_ssat GPR:$a, imm:$pos), (t2SSAT imm:$pos, GPR:$a, 0)>;
-def : T2Pat<(int_arm_usat GPR:$a, imm:$pos), (t2USAT imm:$pos, GPR:$a, 0)>;
+def : T2Pat<(int_arm_ssat GPR:$a, imm1_32:$pos), (t2SSAT imm1_32:$pos, GPR:$a, 0)>;
+def : T2Pat<(int_arm_usat GPR:$a, imm0_31:$pos), (t2USAT imm0_31:$pos, GPR:$a, 0)>;
 
 //===----------------------------------------------------------------------===//
 //  Shift and rotate Instructions.
diff --git a/test/CodeGen/ARM/sat-arith.ll b/test/CodeGen/ARM/sat-arith.ll
index c1ad1a5858e..4844ed1bd21 100644
--- a/test/CodeGen/ARM/sat-arith.ll
+++ b/test/CodeGen/ARM/sat-arith.ll
@@ -1,19 +1,22 @@
-; RUN: llc -O1 -mtriple=armv6-none-none-eabi %s -o - | FileCheck %s
+; RUN: llc -O1 -mtriple=armv6-none-none-eabi %s -o - | FileCheck %s -check-prefix=ARM -check-prefix=CHECK
+; RUN: llc -O1 -mtriple=thumbv7-none-none-eabi %s -o - | FileCheck %s -check-prefix=THUMB -check-prefix=CHECK
 
 ; CHECK-LABEL: qadd
 define i32 @qadd() nounwind {
-; CHECK: mov [[R0:.*]], #8
-; CHECK: mov [[R1:.*]], #128
-; CHECK: qadd [[R0]], [[R1]], [[R0]]
+; CHECK-DAG: mov{{s?}} [[R0:.*]], #8
+; CHECK-DAG: mov{{s?}} [[R1:.*]], #128
+; CHECK-ARM: qadd [[R0]], [[R1]], [[R0]]
+; CHECK-THRUMB: qadd [[R0]], [[R0]], [[R1]]
   %tmp = call i32 @llvm.arm.qadd(i32 128, i32 8)
   ret i32 %tmp
 }
 
 ; CHECK-LABEL: qsub
 define i32 @qsub() nounwind {
-; CHECK: mov [[R0:.*]], #8
-; CHECK: mov [[R1:.*]], #128
-; CHECK: qsub [[R0]], [[R1]], [[R0]]
+; CHECK-DAG: mov{{s?}} [[R0:.*]], #8
+; CHECK-DAG: mov{{s?}} [[R1:.*]], #128
+; CHECK-ARM: qsub [[R0]], [[R1]], [[R0]]
+; CHECK-THRUMB: qadd [[R0]], [[R1]], [[R0]]
   %tmp = call i32 @llvm.arm.qsub(i32 128, i32 8)
   ret i32 %tmp
 }
@@ -21,7 +24,7 @@ define i32 @qsub() nounwind {
 ; upper-bound of the immediate argument
 ; CHECK-LABEL: ssat1
 define i32 @ssat1() nounwind {
-; CHECK: mov [[R0:.*]], #128
+; CHECK: mov{{s?}} [[R0:.*]], #128
 ; CHECK: ssat [[R1:.*]], #32, [[R0]]
   %tmp = call i32 @llvm.arm.ssat(i32 128, i32 32)
   ret i32 %tmp
@@ -30,7 +33,7 @@ define i32 @ssat1() nounwind {
 ; lower-bound of the immediate argument
 ; CHECK-LABEL: ssat2
 define i32 @ssat2() nounwind {
-; CHECK: mov [[R0:.*]], #128
+; CHECK: mov{{s?}} [[R0:.*]], #128
 ; CHECK: ssat [[R1:.*]], #1, [[R0]]
   %tmp = call i32 @llvm.arm.ssat(i32 128, i32 1)
   ret i32 %tmp
@@ -39,7 +42,7 @@ define i32 @ssat2() nounwind {
 ; upper-bound of the immediate argument
 ; CHECK-LABEL: usat1
 define i32 @usat1() nounwind {
-; CHECK: mov [[R0:.*]], #128
+; CHECK: mov{{s?}} [[R0:.*]], #128
 ; CHECK: usat [[R1:.*]], #31, [[R0]]
   %tmp = call i32 @llvm.arm.usat(i32 128, i32 31)
   ret i32 %tmp
@@ -48,7 +51,7 @@ define i32 @usat1() nounwind {
 ; lower-bound of the immediate argument
 ; CHECK-LABEL: usat2
 define i32 @usat2() nounwind {
-; CHECK: mov [[R0:.*]], #128
+; CHECK: mov{{s?}} [[R0:.*]], #128
 ; CHECK: usat [[R1:.*]], #0, [[R0]]
   %tmp = call i32 @llvm.arm.usat(i32 128, i32 0)
   ret i32 %tmp
diff --git a/test/CodeGen/ARM/ssat-lower.ll b/test/CodeGen/ARM/ssat-lower.ll
index a2cdfd87faa..9f0cd0364bc 100644
--- a/test/CodeGen/ARM/ssat-lower.ll
+++ b/test/CodeGen/ARM/ssat-lower.ll
@@ -1,4 +1,5 @@
 ; RUN: not llc < %s -O1 -mtriple=armv6-none-none-eabi 2>&1 | FileCheck %s
+; RUN: not llc < %s -O1 -mtriple=thumbv7-none-none-eabi 2>&1 | FileCheck %s
 
 ; immediate argument < lower-bound
 ; CHECK: LLVM ERROR: Cannot select: intrinsic %llvm.arm.ssat
diff --git a/test/CodeGen/ARM/ssat-upper.ll b/test/CodeGen/ARM/ssat-upper.ll
index bc4712b1994..e53f82b3efa 100644
--- a/test/CodeGen/ARM/ssat-upper.ll
+++ b/test/CodeGen/ARM/ssat-upper.ll
@@ -1,4 +1,5 @@
 ; RUN: not llc < %s -O1 -mtriple=armv6-none-none-eabi 2>&1 | FileCheck %s
+; RUN: not llc < %s -O1 -mtriple=thumbv7-none-none-eabi 2>&1 | FileCheck %s
 
 ; immediate argument > upper-bound
 ; CHECK: LLVM ERROR: Cannot select: intrinsic %llvm.arm.ssat
diff --git a/test/CodeGen/ARM/usat-lower.ll b/test/CodeGen/ARM/usat-lower.ll
index c19cc9c39c4..58d3bba5a1f 100644
--- a/test/CodeGen/ARM/usat-lower.ll
+++ b/test/CodeGen/ARM/usat-lower.ll
@@ -1,4 +1,5 @@
 ; RUN: not llc < %s -O1 -mtriple=armv6-none-none-eabi 2>&1 | FileCheck %s
+; RUN: not llc < %s -O1 -mtriple=thumbv7-none-none-eabi 2>&1 | FileCheck %s
 
 ; immediate argument < lower-bound
 ; CHECK: LLVM ERROR: Cannot select: intrinsic %llvm.arm.usat
diff --git a/test/CodeGen/ARM/usat-upper.ll b/test/CodeGen/ARM/usat-upper.ll
index d6e4a6fd534..84ad694725b 100644
--- a/test/CodeGen/ARM/usat-upper.ll
+++ b/test/CodeGen/ARM/usat-upper.ll
@@ -1,4 +1,5 @@
 ; RUN: not llc < %s -O1 -mtriple=armv6-none-none-eabi 2>&1 | FileCheck %s
+; RUN: not llc < %s -O1 -mtriple=thumbv7-none-none-eabi 2>&1 | FileCheck %s
 
 ; immediate argument > upper-bound
 ; CHECK: LLVM ERROR: Cannot select: intrinsic %llvm.arm.usat