| ; RUN: opt < %s -simplifycfg -S | FileCheck %s |
| |
| ; CHECK-NOT: switch |
| %llvm.dbg.anchor.type = type { i32, i32 } |
| %llvm.dbg.compile_unit.type = type { i32, { }*, i32, i8*, i8*, i8*, i1, i1, i8* } |
| |
| @llvm.dbg.compile_units = linkonce constant %llvm.dbg.anchor.type { i32 458752, i32 17 }, section "llvm.metadata" |
| |
| @.str = internal constant [4 x i8] c"a.c\00", section "llvm.metadata" ; <[4 x i8]*> [#uses=1] |
| @.str1 = internal constant [6 x i8] c"/tmp/\00", section "llvm.metadata" ; <[6 x i8]*> [#uses=1] |
| @.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] |
| @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], [4 x i8]* @.str, i32 0, i32 0), i8* getelementptr ([6 x i8], [6 x i8]* @.str1, i32 0, i32 0), i8* getelementptr ([55 x i8], [55 x i8]* @.str2, i32 0, i32 0), i1 true, i1 false, i8* null }, section "llvm.metadata" ; <%llvm.dbg.compile_unit.type*> [#uses=1] |
| |
| declare void @llvm.dbg.stoppoint(i32, i32, { }*) nounwind |
| |
| ; Test folding all to same dest |
| define i32 @test3(i1 %C) { |
| br i1 %C, label %Start, label %TheDest |
| Start: ; preds = %0 |
| call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) |
| switch i32 3, label %TheDest [ |
| i32 0, label %TheDest |
| i32 1, label %TheDest |
| i32 2, label %TheDest |
| i32 5, label %TheDest |
| ] |
| TheDest: ; preds = %Start, %Start, %Start, %Start, %Start, %0 |
| ret i32 1234 |
| } |
| |
| ; Test folding switch -> branch |
| define i32 @test4(i32 %C) { |
| switch i32 %C, label %L1 [ |
| i32 0, label %L2 |
| ] |
| L1: ; preds = %0 |
| call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) |
| ret i32 0 |
| L2: ; preds = %0 |
| call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) |
| ret i32 1 |
| } |
| |
| ; Can fold into a cond branch! |
| define i32 @test5(i32 %C) { |
| switch i32 %C, label %L1 [ |
| i32 0, label %L2 |
| i32 123, label %L1 |
| ] |
| L1: ; preds = %0, %0 |
| call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) |
| ret i32 0 |
| L2: ; preds = %0 |
| call void @llvm.dbg.stoppoint(i32 5, i32 0, { }* bitcast (%llvm.dbg.compile_unit.type* @llvm.dbg.compile_unit to { }*)) |
| ret i32 1 |
| } |
| |