xref: /llvm-project/llvm/test/Transforms/CodeExtractor/LoopExtractor_min_wrapper.ll (revision 0ca8ddd84d416b2b2b831fbc75ac8dbb77a12928) 
1; RUN: opt < %s -passes='function(break-crit-edges,loop-simplify),loop-extract' -S | FileCheck %s
2
3; This function is just a minimal wrapper around a loop and should not be extracted.
4define void @test() {
5; CHECK-LABEL: @test(
6; CHECK-NEXT:  entry:
7; CHECK-NEXT:    br label %loop
8; CHECK:       loop:
9; CHECK-NEXT:    %index = phi i32 [ 0, %entry ], [ %next, %loop.loop_crit_edge ]
10; CHECK-NEXT:    call void @foo()
11; CHECK-NEXT:    %next = add nsw i32 %index, -1
12; CHECK-NEXT:    %repeat = icmp sgt i32 %index, 1
13; CHECK-NEXT:    br i1 %repeat, label %loop.loop_crit_edge, label %exit
14; CHECK:       loop.loop_crit_edge:
15; CHECK-NEXT:    br label %loop
16; CHECK:       exit:
17; CHECK-NEXT:    ret void
18
19entry:
20  br label %loop
21
22loop:                                             ; preds = %loop, %entry
23  %index = phi i32 [ 0, %entry ], [ %next, %loop ]
24  call void @foo()
25  %next = add nsw i32 %index, -1
26  %repeat = icmp sgt i32 %index, 1
27  br i1 %repeat, label %loop, label %exit
28
29exit:                                             ; preds = %loop
30  ret void
31}
32
33declare void @foo()
34
35; CHECK-NOT: define
36