1; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s 2 3; CHECK-NOT: switch 4 %llvm.dbg.anchor.type = type { i32, i32 } 5 %llvm.dbg.compile_unit.type = type { i32, ptr, i32, ptr, ptr, ptr, i1, i1, ptr } 6 7@llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata" 8 9@.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata" ; <ptr> [#uses=1] 10@.str1 = internal constant [6 x i8] c"/tmp/\00", section "llvm.metadata" ; <ptr> [#uses=1] 11@.str2 = internal constant [55 x i8] c"4.2.1 (Based on Apple Inc. build 5636) (LLVM build 00)\00", section "llvm.metadata" ; <ptr> [#uses=1] 12@llvm.dbg.compile_unit = internal constant %llvm.dbg.compile_unit.type { i32 458769, ptr @llvm.dbg.compile_units, i32 1, ptr @.str, ptr @.str1, ptr @.str2, i1 true, i1 false, ptr null }, section "llvm.metadata" ; <ptr> [#uses=1] 13 14declare void @llvm.dbg.stoppoint(i32, i32, ptr) nounwind 15 16; Test folding all to same dest 17define i32 @test3(i1 %C) { 18 br i1 %C, label %Start, label %TheDest 19Start: ; preds = %0 20call void @llvm.dbg.stoppoint(i32 5, i32 0, ptr @llvm.dbg.compile_unit) 21 switch i32 3, label %TheDest [ 22 i32 0, label %TheDest 23 i32 1, label %TheDest 24 i32 2, label %TheDest 25 i32 5, label %TheDest 26 ] 27TheDest: ; preds = %Start, %Start, %Start, %Start, %Start, %0 28 ret i32 1234 29} 30 31; Test folding switch -> branch 32define i32 @test4(i32 %C) { 33 switch i32 %C, label %L1 [ 34 i32 0, label %L2 35 ] 36L1: ; preds = %0 37call void @llvm.dbg.stoppoint(i32 5, i32 0, ptr @llvm.dbg.compile_unit) 38 ret i32 0 39L2: ; preds = %0 40call void @llvm.dbg.stoppoint(i32 5, i32 0, ptr @llvm.dbg.compile_unit) 41 ret i32 1 42} 43 44; Can fold into a cond branch! 45define i32 @test5(i32 %C) { 46 switch i32 %C, label %L1 [ 47 i32 0, label %L2 48 i32 123, label %L1 49 ] 50L1: ; preds = %0, %0 51call void @llvm.dbg.stoppoint(i32 5, i32 0, ptr @llvm.dbg.compile_unit) 52 ret i32 0 53L2: ; preds = %0 54call void @llvm.dbg.stoppoint(i32 5, i32 0, ptr @llvm.dbg.compile_unit) 55 ret i32 1 56} 57 58