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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 3
; RUN: opt -S -passes='print<scalar-evolution>,loop(loop-unroll-full,indvars)' < %s 2>/dev/null | FileCheck %s
@g = constant [5 x i32] [i32 0, i32 1, i32 2, i32 3, i32 4]
declare void @use(i32)
define void @test() {
; CHECK-LABEL: define void @test() {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: br label [[LOOP2:%.*]]
; CHECK: loop2:
; CHECK-NEXT: br i1 false, label [[LOOP2]], label [[LOOP_LATCH:%.*]], !llvm.loop [[LOOP0:![0-9]+]]
; CHECK: loop.latch:
; CHECK-NEXT: call void @use(i32 3)
; CHECK-NEXT: br label [[LOOP2_1:%.*]]
; CHECK: loop2.1:
; CHECK-NEXT: br i1 false, label [[LOOP2_1]], label [[LOOP_LATCH_1:%.*]], !llvm.loop [[LOOP0]]
; CHECK: loop.latch.1:
; CHECK-NEXT: call void @use(i32 4)
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
%iv.next = add i64 %iv, 1
br label %loop2
loop2:
%iv2 = phi i64 [ 0, %loop ], [ %iv2.next, %loop2 ]
%iv2.next = add i64 %iv2, 1
%idx = add i64 %iv, %iv2
%gep = getelementptr i32, ptr @g, i64 %idx
%load = load i32, ptr %gep
%cmp2 = icmp ne i64 %iv2, 3
br i1 %cmp2, label %loop2, label %loop.latch, !llvm.loop !0
loop.latch:
%load.lcssa = phi i32 [ %load, %loop2 ]
call void @use(i32 %load)
%cmp = icmp ne i64 %iv, 1
br i1 %cmp, label %loop, label %exit
exit:
ret void
}
!0 = distinct !{!0, !1}
!1 = !{!"llvm.loop.unroll.disable", i1 true}
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