1 ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
2 ; RUN: opt < %s -passes=indvars -S | FileCheck %s
4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128-ni:1"
5 target triple = "x86_64-unknown-linux-gnu"
9 define void @test(i64 %a) {
10 ; CHECK-LABEL: define void @test(
11 ; CHECK-SAME: i64 [[A:%.*]]) {
13 ; CHECK-NEXT: br label [[OUTER_HEADER:%.*]]
14 ; CHECK: outer_header:
15 ; CHECK-NEXT: [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[OUTER_LATCH:%.*]] ], [ 21, [[ENTRY:%.*]] ]
16 ; CHECK-NEXT: [[I:%.*]] = phi i64 [ 20, [[ENTRY]] ], [ [[I_NEXT:%.*]], [[OUTER_LATCH]] ]
17 ; CHECK-NEXT: br label [[INNER_HEADER:%.*]]
18 ; CHECK: inner_header:
19 ; CHECK-NEXT: [[J:%.*]] = phi i64 [ 1, [[OUTER_HEADER]] ], [ [[J_NEXT:%.*]], [[INNER_HEADER]] ]
20 ; CHECK-NEXT: call void @foo(i64 [[J]])
21 ; CHECK-NEXT: [[J_NEXT]] = add nuw nsw i64 [[J]], 1
22 ; CHECK-NEXT: [[EXITCOND:%.*]] = icmp ne i64 [[J_NEXT]], [[INDVARS_IV]]
23 ; CHECK-NEXT: br i1 [[EXITCOND]], label [[INNER_HEADER]], label [[OUTER_LATCH]]
25 ; CHECK-NEXT: [[I_NEXT]] = add nuw nsw i64 [[I]], 1
26 ; CHECK-NEXT: [[COND2:%.*]] = icmp ne i64 [[I_NEXT]], 40
27 ; CHECK-NEXT: [[INDVARS_IV_NEXT]] = add nuw nsw i64 [[INDVARS_IV]], 1
28 ; CHECK-NEXT: br i1 [[COND2]], label [[OUTER_HEADER]], label [[RETURN:%.*]]
30 ; CHECK-NEXT: ret void
33 br label %outer_header
36 %i = phi i64 [20, %entry], [%i.next, %outer_latch]
37 %i.next = add nuw nsw i64 %i, 1
38 br label %inner_header
41 %j = phi i64 [1, %outer_header], [%j.next, %inner_header]
42 %cmp = icmp ult i64 %j, %i.next
43 %s = select i1 %cmp, i64 %j, i64 %i
44 call void @foo(i64 %s)
45 %j.next = add nuw nsw i64 %j, 1
46 %cond = icmp ult i64 %j, %i
47 br i1 %cond, label %inner_header, label %outer_latch
50 %cond2 = icmp ne i64 %i.next, 40
51 br i1 %cond2, label %outer_header, label %return