Imported Upstream version 5.18.0.167

Former-commit-id: 289509151e0fee68a1b591a20c9f109c3c789d3a

external/llvm/test/Transforms/SimplifyCFG/basictest.ll

@@ -1,133 +0,0 @@
-; Test CFG simplify removal of branch instructions.
-;
-; RUN: opt < %s -simplifycfg -S | FileCheck %s
-; RUN: opt < %s -passes=simplify-cfg -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
-}
-
-; Folding branch to a common destination.
-; CHECK-LABEL: @test4_fold
-; CHECK: %cmp1 = icmp eq i32 %a, %b
-; CHECK: %cmp2 = icmp ugt i32 %a, 0
-; CHECK: %or.cond = and i1 %cmp1, %cmp2
-; CHECK: br i1 %or.cond, label %else, label %untaken
-; CHECK-NOT: taken:
-; CHECK: ret void
-define void @test4_fold(i32 %a, i32 %b) {
-  %cmp1 = icmp eq i32 %a, %b
-  br i1 %cmp1, label %taken, label %untaken
-
-taken:
-  %cmp2 = icmp ugt i32 %a, 0
-  br i1 %cmp2, label %else, label %untaken
-
-else:
-  call void @foo()
-  ret void
-
-untaken:
-  ret void
-}
-
-; Prefer a simplification based on a dominating condition rather than folding a
-; branch to a common destination.
-; CHECK-LABEL: @test4
-; CHECK-NOT: br
-; CHECK-NOT: br
-; CHECK-NOT: call
-; CHECK: ret void
-define void @test4_no_fold(i32 %a, i32 %b) {
-  %cmp1 = icmp eq i32 %a, %b
-  br i1 %cmp1, label %taken, label %untaken
-
-taken:
-  %cmp2 = icmp ugt i32 %a, %b
-  br i1 %cmp2, label %else, label %untaken
-
-else:
-  call void @foo()
-  ret void
-
-untaken:
-  ret void
-}
-
-declare void @foo()
-
-; 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, i8* %r, align 1, !dbg !{{[0-9]+$}}
-
-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, i8* %r, align 1, !range !2, !tbaa !10, !dbg !5
-  %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*)
-
-!llvm.dbg.cu = !{!3}
-!llvm.module.flags = !{!8, !9}
-
-!0 = !{!10, !10, i64 0}
-!1 = !{!"foo"}
-!2 = !{i8 0, i8 2}
-!3 = distinct !DICompileUnit(language: DW_LANG_C99, file: !7, producer: "clang", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !4)
-!4 = !{}
-!5 = !DILocation(line: 23, scope: !6)
-!6 = distinct !DISubprogram(name: "foo", scope: !3, file: !7, line: 1, type: !DISubroutineType(types: !4), isLocal: false, isDefinition: true, scopeLine: 1, flags: DIFlagPrototyped, isOptimized: false, unit: !3, variables: !4)
-!7 = !DIFile(filename: "foo.c", directory: "/")
-!8 = !{i32 2, !"Dwarf Version", i32 2}
-!9 = !{i32 2, !"Debug Info Version", i32 3}
-!10 = !{!"scalar type", !1}