1 ; These tests have an infinite trip count. We obviously shouldn't remove the
4 ; RUN: opt < %s -passes='loop(indvars),adce,simplifycfg' -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s
6 ;; test for (i = 1; i != 100; i += 2)
7 define i32 @infinite_linear() {
8 ; CHECK-LABEL: @infinite_linear(
12 loop: ; preds = %loop, %entry
14 %i = phi i32 [ 1, %entry ], [ %i.next, %loop ] ; <i32> [#uses=3]
15 %i.next = add i32 %i, 2 ; <i32> [#uses=1]
16 %c = icmp ne i32 %i, 100 ; <i1> [#uses=1]
19 br i1 %c, label %loop, label %loopexit
21 loopexit: ; preds = %loop
22 ; CHECK-LABEL: loopexit:
26 ;; test for (i = 1; i*i != 63; ++i)
27 define i32 @infinite_quadratic() {
28 ; CHECK-LABEL: @infinite_quadratic(
32 loop: ; preds = %loop, %entry
34 %i = phi i32 [ 1, %entry ], [ %i.next, %loop ] ; <i32> [#uses=4]
35 %isquare = mul i32 %i, %i ; <i32> [#uses=1]
36 %i.next = add i32 %i, 1 ; <i32> [#uses=1]
37 %c = icmp ne i32 %isquare, 63 ; <i1> [#uses=1]
40 br i1 %c, label %loop, label %loopexit
42 loopexit: ; preds = %loop
43 ; CHECK-LABEL: loopexit: