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