From 5e7949c79d8e6611e9053bceb967a9bfbb06c59b Mon Sep 17 00:00:00 2001
From: Max Kazantsev <mkazantsev@azul.com>
Date: Fri, 10 Mar 2023 12:59:01 +0700
Subject: [PATCH] [Test] Add negative eq/ne tests for D143726

---
 llvm/test/Transforms/LICM/min_max.ll | 62 ++++++++++++++++++++++++++++++++++++
 1 file changed, 62 insertions(+)

diff --git a/llvm/test/Transforms/LICM/min_max.ll b/llvm/test/Transforms/LICM/min_max.ll
index b3f0e8c..b4484d1 100644
--- a/llvm/test/Transforms/LICM/min_max.ll
+++ b/llvm/test/Transforms/LICM/min_max.ll
@@ -999,3 +999,65 @@ loop:
 exit:
   ret i32 %iv
 }
+
+; Do not optimize: predicate eq.
+define i32 @test_eq_neg(i32 %start, i32 %inv_1, i32 %inv_2) {
+; CHECK-LABEL: @test_eq_neg(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[START:%.*]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
+; CHECK-NEXT:    [[CMP_1:%.*]] = icmp eq i32 [[IV]], [[INV_1:%.*]]
+; CHECK-NEXT:    [[CMP_2:%.*]] = icmp eq i32 [[IV]], [[INV_2:%.*]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = and i1 [[CMP_1]], [[CMP_2]]
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    [[IV_LCSSA:%.*]] = phi i32 [ [[IV]], [[LOOP]] ]
+; CHECK-NEXT:    ret i32 [[IV_LCSSA]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [%start, %entry], [%iv.next, %loop]
+  %cmp_1 = icmp eq i32 %iv, %inv_1
+  %cmp_2 = icmp eq i32 %iv, %inv_2
+  %loop_cond = and i1 %cmp_1, %cmp_2
+  %iv.next = add i32 %iv, 1
+  br i1 %loop_cond, label %loop, label %exit
+
+exit:
+  ret i32 %iv
+}
+
+; Do not optimize: predicate ne.
+define i32 @test_ne_neg(i32 %start, i32 %inv_1, i32 %inv_2) {
+; CHECK-LABEL: @test_ne_neg(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    br label [[LOOP:%.*]]
+; CHECK:       loop:
+; CHECK-NEXT:    [[IV:%.*]] = phi i32 [ [[START:%.*]], [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
+; CHECK-NEXT:    [[CMP_1:%.*]] = icmp ne i32 [[IV]], [[INV_1:%.*]]
+; CHECK-NEXT:    [[CMP_2:%.*]] = icmp ne i32 [[IV]], [[INV_2:%.*]]
+; CHECK-NEXT:    [[LOOP_COND:%.*]] = and i1 [[CMP_1]], [[CMP_2]]
+; CHECK-NEXT:    [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT:    br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK:       exit:
+; CHECK-NEXT:    [[IV_LCSSA:%.*]] = phi i32 [ [[IV]], [[LOOP]] ]
+; CHECK-NEXT:    ret i32 [[IV_LCSSA]]
+;
+entry:
+  br label %loop
+
+loop:
+  %iv = phi i32 [%start, %entry], [%iv.next, %loop]
+  %cmp_1 = icmp ne i32 %iv, %inv_1
+  %cmp_2 = icmp ne i32 %iv, %inv_2
+  %loop_cond = and i1 %cmp_1, %cmp_2
+  %iv.next = add i32 %iv, 1
+  br i1 %loop_cond, label %loop, label %exit
+
+exit:
+  ret i32 %iv
+}
-- 
2.7.4