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; Test CFG simplify removal of branch instructions.
;
; RUN: opt < %s -simplifycfg -S | FileCheck %s
define void @test1() {
br label %1
ret void
; CHECK-LABEL: @test1(
; CHECK-NEXT: ret void
}
define void @test2() {
ret void
ret void
; CHECK-LABEL: @test2(
; CHECK-NEXT: ret void
; CHECK-NEXT: }
}
define void @test3(i1 %T) {
br i1 %T, label %1, label %1
ret void
; CHECK-LABEL: @test3(
; CHECK-NEXT: ret void
}
; PR5795
define void @test5(i32 %A) {
switch i32 %A, label %return [
i32 2, label %1
i32 10, label %2
]
ret void
ret void
return: ; preds = %entry
ret void
; CHECK-LABEL: @test5(
; CHECK-NEXT: ret void
}
; PR14893
define i8 @test6f() {
; CHECK-LABEL: @test6f
; CHECK: alloca i8, align 1
; CHECK-NEXT: call i8 @test6g
; CHECK-NEXT: icmp eq i8 %tmp, 0
; CHECK-NEXT: load i8* %r, align 1{{$}}
bb0:
%r = alloca i8, align 1
%tmp = call i8 @test6g(i8* %r)
%tmp1 = icmp eq i8 %tmp, 0
br i1 %tmp1, label %bb2, label %bb1
bb1:
%tmp3 = load i8* %r, align 1, !range !2, !tbaa !1
%tmp4 = icmp eq i8 %tmp3, 1
br i1 %tmp4, label %bb2, label %bb3
bb2:
br label %bb3
bb3:
%tmp6 = phi i8 [ 0, %bb2 ], [ 1, %bb1 ]
ret i8 %tmp6
}
declare i8 @test6g(i8*)
!0 = metadata !{metadata !1, metadata !1, i64 0}
!1 = metadata !{metadata !"foo"}
!2 = metadata !{i8 0, i8 2}
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