40 lines
1.5 KiB
LLVM
40 lines
1.5 KiB
LLVM
; The loop canonicalization pass should guarantee that there is one backedge
|
|
; for all loops. This allows the -indvars pass to recognize the %IV
|
|
; induction variable in this testcase.
|
|
|
|
; RUN: opt < %s -indvars -S | FileCheck %s
|
|
; CHECK: Loop.backedge:
|
|
; CHECK-NOT: br
|
|
; CHECK: br label %Loop, !dbg [[BACKEDGE_LOC:![0-9]+]]
|
|
|
|
; CHECK: [[BACKEDGE_LOC]] = !DILocation(line: 101, column: 1, scope: !{{.*}})
|
|
|
|
define i32 @test(i1 %C) {
|
|
; <label>:0
|
|
br label %Loop, !dbg !6
|
|
Loop: ; preds = %BE2, %BE1, %0
|
|
%IV = phi i32 [ 1, %0 ], [ %IV2, %BE1 ], [ %IV2, %BE2 ] ; <i32> [#uses=2]
|
|
store i32 %IV, i32* null, !dbg !7
|
|
%IV2 = add i32 %IV, 2, !dbg !8 ; <i32> [#uses=2]
|
|
br i1 %C, label %BE1, label %BE2, !dbg !9
|
|
BE1: ; preds = %Loop
|
|
br label %Loop, !dbg !10
|
|
BE2: ; preds = %n br label %Loop
|
|
br label %Loop, !dbg !11
|
|
}
|
|
|
|
!llvm.module.flags = !{!0, !1}
|
|
!0 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!1 = !{i32 2, !"Debug Info Version", i32 3}
|
|
|
|
!2 = !{}
|
|
!3 = !DISubroutineType(types: !2)
|
|
!4 = !DIFile(filename: "atomic.cpp", directory: "/tmp")
|
|
!5 = distinct !DISubprogram(name: "test", scope: !4, file: !4, line: 99, type: !3, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
|
|
!6 = !DILocation(line: 100, column: 1, scope: !5)
|
|
!7 = !DILocation(line: 101, column: 1, scope: !5)
|
|
!8 = !DILocation(line: 102, column: 1, scope: !5)
|
|
!9 = !DILocation(line: 103, column: 1, scope: !5)
|
|
!10 = !DILocation(line: 104, column: 1, scope: !5)
|
|
!11 = !DILocation(line: 105, column: 1, scope: !5)
|