1 ; RUN: opt < %s -simplifycfg -S | \ 2 ; RUN: not grep switch 3 4 5 %llvm.dbg.anchor.type = type { i32, i32 } 6 %llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8*, i1, i1, i8* } 7 8 @llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata" 9 10 @.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1] 11 @.str1 = internal constant [6 x i8] c"/tmp/\00", section "llvm.metadata" ; <[6 x i8]*> [#uses=1] 12 @.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] 13 @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] 14 15 declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind 16 17 ; Test folding all to same dest 18 define i32 @test3(i1 %C) { 19 br i1 %C, label %Start, label %TheDest 20 Start: ; preds = %0 21 call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) 22 switch i32 3, label %TheDest [ 23 i32 0, label %TheDest 24 i32 1, label %TheDest 25 i32 2, label %TheDest 26 i32 5, label %TheDest 27 ] 28 TheDest: ; preds = %Start, %Start, %Start, %Start, %Start, %0 29 ret i32 1234 30 } 31 32 ; Test folding switch -> branch 33 define i32 @test4(i32 %C) { 34 switch i32 %C, label %L1 [ 35 i32 0, label %L2 36 ] 37 L1: ; preds = %0 38 call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) 39 ret i32 0 40 L2: ; preds = %0 41 call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) 42 ret i32 1 43 } 44 45 ; Can fold into a cond branch! 46 define i32 @test5(i32 %C) { 47 switch i32 %C, label %L1 [ 48 i32 0, label %L2 49 i32 123, label %L1 50 ] 51 L1: ; preds = %0, %0 52 call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) 53 ret i32 0 54 L2: ; preds = %0 55 call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) 56 ret i32 1 57 } 58 59
