FullUnroll.ll
1.79 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
; RUN: opt -passes='loop-unroll-full' -disable-verify -disable-loop-unrolling=true --mtriple x86_64-pc-linux-gnu -S -o - %s | FileCheck %s
; This checks that the loop full unroller will fire in the new pass manager
; when forced via #pragma in the source (or annotation in the code).
; Completely unroll the inner loop
; CHECK-LABEL: @foo
; CHECK: br i1
; CHECK-NOT: br i1
; Function Attrs: noinline nounwind optnone uwtable
define void @foo() local_unnamed_addr #0 {
bb:
%tmp = alloca [5 x i32*], align 16
br label %bb7.preheader
bb3.loopexit: ; preds = %bb10
%spec.select.lcssa = phi i32 [ %spec.select, %bb10 ]
%tmp5.not = icmp eq i32 %spec.select.lcssa, 0
br i1 %tmp5.not, label %bb24, label %bb7.preheader
bb7.preheader: ; preds = %bb3.loopexit, %bb
%tmp1.06 = phi i32 [ 5, %bb ], [ %spec.select.lcssa, %bb3.loopexit ]
br label %bb10
bb10: ; preds = %bb10, %bb7.preheader
%indvars.iv = phi i64 [ 0, %bb7.preheader ], [ %indvars.iv.next, %bb10 ]
%tmp1.14 = phi i32 [ %tmp1.06, %bb7.preheader ], [ %spec.select, %bb10 ]
%tmp13 = getelementptr inbounds [5 x i32*], [5 x i32*]* %tmp, i64 0, i64 %indvars.iv
%tmp14 = load i32*, i32** %tmp13, align 8
%tmp15.not = icmp ne i32* %tmp14, null
%tmp18 = sext i1 %tmp15.not to i32
%spec.select = add nsw i32 %tmp1.14, %tmp18
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%exitcond.not = icmp eq i64 %indvars.iv.next, 5
br i1 %exitcond.not, label %bb3.loopexit, label %bb10, !llvm.loop !1
bb24: ; preds = %bb3.loopexit
ret void
}
attributes #0 = { nounwind uwtable }
!llvm.module.flags = !{!0}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = distinct !{!1, !2}
!2 = !{!"llvm.loop.unroll.full"}