llvm/llvm/test/Transforms/GVN/PRE/phi-translate.ll

; RUN: opt -passes=gvn -S < %s | FileCheck %s

target datalayout = "e-p:64:64:64"

; CHECK-LABEL: @foo(
; CHECK: entry.end_crit_edge:
; CHECK: %[[INDEX:[a-z0-9.]+]] = sext i32 %x to i64{{$}}
; CHECK: %[[ADDRESS:[a-z0-9.]+]] = getelementptr [100 x i32], ptr @G, i64 0, i64 %[[INDEX]]{{$}}
; CHECK:   %n.pre = load i32, ptr %[[ADDRESS]], align 4, !dbg [[N_LOC:![0-9]+]]
; CHECK: br label %end
; CHECK: then:
; CHECK:   store i32 %z
; CHECK: end:
; CHECK:   %n = phi i32 [ %n.pre, %entry.end_crit_edge ], [ %z, %then ], !dbg [[N_LOC]]
; CHECK:   ret i32 %n

; CHECK: [[N_LOC]] = !DILocation(line: 47, column: 1, scope: !{{.*}})

@G = external global [100 x i32]
define i32 @foo(i32 %x, i32 %z) !dbg !6 {
entry:
  %tobool = icmp eq i32 %z, 0, !dbg !7
  br i1 %tobool, label %end, label %then, !dbg !7

then:
  %i = sext i32 %x to i64, !dbg !8
  %p = getelementptr [100 x i32], ptr @G, i64 0, i64 %i, !dbg !8
  store i32 %z, ptr %p, !dbg !8
  br label %end, !dbg !8

end:
  %j = sext i32 %x to i64, !dbg !9
  %q = getelementptr [100 x i32], ptr @G, i64 0, i64 %j, !dbg !10
  %n = load i32, ptr %q, !dbg !11
  ret i32 %n, !dbg !11
}

!llvm.module.flags = !{!0, !1, !2}
!llvm.dbg.cu = !{!12}
!0 = !{i32 2, !"Dwarf Version", i32 4}
!1 = !{i32 2, !"Debug Info Version", i32 3}
!2 = !{i32 1, !"PIC Level", i32 2}

!3 = !{}
!4 = !DISubroutineType(types: !3)
!5 = !DIFile(filename: "a.cc", directory: "/tmp")
!6 = distinct !DISubprogram(name: "foo", scope: !5, file: !5, line: 42, type: !4, isLocal: false, isDefinition: true, scopeLine: 43, flags: DIFlagPrototyped, isOptimized: false, unit: !12, retainedNodes: !3)
!7 = !DILocation(line: 43, column: 1, scope: !6)
!8 = !DILocation(line: 44, column: 1, scope: !6)
!9 = !DILocation(line: 45, column: 1, scope: !6)
!10 = !DILocation(line: 46, column: 1, scope: !6)
!11 = !DILocation(line: 47, column: 1, scope: !6)
!12 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang",
                             file: !5,
                             isOptimized: true, flags: "-O2",
                             splitDebugFilename: "abc.debug", emissionKind: 2)