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