From a70fdf863573e0c4220c4ca9e82f9119b6dcf333 Mon Sep 17 00:00:00 2001
From: Nikita Popov <nikita.ppv@gmail.com>
Date: Wed, 21 Nov 2018 20:34:11 +0000
Subject: [PATCH] [InstCombine] Add tests for funnel shift with zero operand;
 NFC

These are additional baseline tests for D54778.

llvm-svn: 347414
---
 llvm/test/Transforms/InstCombine/fsh.ll | 36 +++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/llvm/test/Transforms/InstCombine/fsh.ll b/llvm/test/Transforms/InstCombine/fsh.ll
index 3526aab68a34..0d85613d3482 100644
--- a/llvm/test/Transforms/InstCombine/fsh.ll
+++ b/llvm/test/Transforms/InstCombine/fsh.ll
@@ -152,6 +152,15 @@ define i32 @fshl_op0_undef(i32 %x) {
   ret i32 %r
 }
 
+define i32 @fshl_op0_zero(i32 %x) {
+; CHECK-LABEL: @fshl_op0_zero(
+; CHECK-NEXT:    [[R:%.*]] = call i32 @llvm.fshl.i32(i32 0, i32 [[X:%.*]], i32 7)
+; CHECK-NEXT:    ret i32 [[R]]
+;
+  %r = call i32 @llvm.fshl.i32(i32 0, i32 %x, i32 7)
+  ret i32 %r
+}
+
 define i33 @fshr_op0_undef(i33 %x) {
 ; CHECK-LABEL: @fshr_op0_undef(
 ; CHECK-NEXT:    [[R:%.*]] = call i33 @llvm.fshr.i33(i33 undef, i33 [[X:%.*]], i33 7)
@@ -161,6 +170,15 @@ define i33 @fshr_op0_undef(i33 %x) {
   ret i33 %r
 }
 
+define i33 @fshr_op0_zero(i33 %x) {
+; CHECK-LABEL: @fshr_op0_zero(
+; CHECK-NEXT:    [[R:%.*]] = call i33 @llvm.fshr.i33(i33 0, i33 [[X:%.*]], i33 7)
+; CHECK-NEXT:    ret i33 [[R]]
+;
+  %r = call i33 @llvm.fshr.i33(i33 0, i33 %x, i33 7)
+  ret i33 %r
+}
+
 define i32 @fshl_op1_undef(i32 %x) {
 ; CHECK-LABEL: @fshl_op1_undef(
 ; CHECK-NEXT:    [[R:%.*]] = call i32 @llvm.fshl.i32(i32 [[X:%.*]], i32 undef, i32 7)
@@ -170,6 +188,15 @@ define i32 @fshl_op1_undef(i32 %x) {
   ret i32 %r
 }
 
+define i32 @fshl_op1_zero(i32 %x) {
+; CHECK-LABEL: @fshl_op1_zero(
+; CHECK-NEXT:    [[R:%.*]] = call i32 @llvm.fshl.i32(i32 [[X:%.*]], i32 0, i32 7)
+; CHECK-NEXT:    ret i32 [[R]]
+;
+  %r = call i32 @llvm.fshl.i32(i32 %x, i32 0, i32 7)
+  ret i32 %r
+}
+
 define i33 @fshr_op1_undef(i33 %x) {
 ; CHECK-LABEL: @fshr_op1_undef(
 ; CHECK-NEXT:    [[R:%.*]] = call i33 @llvm.fshr.i33(i33 [[X:%.*]], i33 undef, i33 7)
@@ -179,6 +206,15 @@ define i33 @fshr_op1_undef(i33 %x) {
   ret i33 %r
 }
 
+define i33 @fshr_op1_zero(i33 %x) {
+; CHECK-LABEL: @fshr_op1_zero(
+; CHECK-NEXT:    [[R:%.*]] = call i33 @llvm.fshr.i33(i33 [[X:%.*]], i33 0, i33 7)
+; CHECK-NEXT:    ret i33 [[R]]
+;
+  %r = call i33 @llvm.fshr.i33(i33 %x, i33 0, i33 7)
+  ret i33 %r
+}
+
 ; Only demand bits from one of the operands.
 
 define i32 @fshl_only_op0_demanded(i32 %x, i32 %y) {