1; Inject metadata to set the .gcno file location 2; RUN: echo '!19 = !{!"%/T/return-block.ll", !0}' > %t1 3; RUN: cat %s %t1 > %t2 4 5; By default, the return block is last. 6; RUN: opt -insert-gcov-profiling -disable-output %t2 7; RUN: llvm-cov gcov -n -dump %T/return-block.gcno 2>&1 | FileCheck -check-prefix=CHECK -check-prefix=RETURN-LAST %s 8 9; But we can optionally emit it second, to match newer gcc versions. 10; RUN: opt -insert-gcov-profiling -gcov-exit-block-before-body -disable-output %t2 11; RUN: llvm-cov gcov -n -dump %T/return-block.gcno 2>&1 | FileCheck -check-prefix=CHECK -check-prefix=RETURN-SECOND %s 12 13target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 14target triple = "x86_64-unknown-linux-gnu" 15 16@A = common global i32 0, align 4 17 18; Function Attrs: nounwind uwtable 19define void @test() #0 { 20entry: 21 tail call void (...)* @f() #2, !dbg !14 22 %0 = load i32* @A, align 4, !dbg !15 23 %tobool = icmp eq i32 %0, 0, !dbg !15 24 br i1 %tobool, label %if.end, label %if.then, !dbg !15 25 26if.then: ; preds = %entry 27 tail call void (...)* @g() #2, !dbg !16 28 br label %if.end, !dbg !16 29 30if.end: ; preds = %entry, %if.then 31 ret void, !dbg !18 32} 33 34declare void @f(...) #1 35 36declare void @g(...) #1 37 38attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 39attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" } 40attributes #2 = { nounwind } 41 42!llvm.gcov = !{!19} 43!llvm.dbg.cu = !{!0} 44!llvm.module.flags = !{!11, !12} 45!llvm.ident = !{!13} 46 47!0 = !{!"0x11\0012\00clang version 3.6.0 (trunk 223182)\001\00\000\00\001", !1, !2, !2, !3, !8, !2} ; [ DW_TAG_compile_unit ] [return-block.c] [DW_LANG_C99] 48!1 = !{!".../llvm/test/Transforms/GCOVProfiling/return-block.ll", !""} 49!2 = !{} 50!3 = !{!4} 51!4 = !{!"0x2e\00test\00test\00\005\000\001\000\000\000\001\005", !1, !5, !6, null, void ()* @test, null, null, !2} ; [ DW_TAG_subprogram ] [line 5] [def] [test] 52!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [return-block.c] 53!6 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ] 54!7 = !{null} 55!8 = !{!9} 56!9 = !{!"0x34\00A\00A\00\003\000\001", null, !5, !10, i32* @A, null} ; [ DW_TAG_variable ] [A] [line 3] [def] 57!10 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed] 58!11 = !{i32 2, !"Dwarf Version", i32 4} 59!12 = !{i32 2, !"Debug Info Version", i32 2} 60!13 = !{!"clang version 3.6.0 (trunk 223182)"} 61!14 = !MDLocation(line: 6, column: 3, scope: !4) 62!15 = !MDLocation(line: 7, column: 7, scope: !4) 63!16 = !MDLocation(line: 8, column: 5, scope: !17) 64!17 = !{!"0xb\007\007\000", !1, !4} ; [ DW_TAG_lexical_block ] [return-block.c] 65!18 = !MDLocation(line: 9, column: 1, scope: !4) 66 67; There should be no destination edges for the exit block. 68; CHECK: Block : 1 Counter : 0 69; RETURN-LAST: Destination Edges 70; RETURN-SECOND-NOT: Destination Edges 71; CHECK: Block : 2 Counter : 0 72; CHECK: Block : 4 Counter : 0 73; RETURN-LAST-NOT: Destination Edges 74; RETURN-SECOND: Destination Edges 75; CHECK-NOT: Block : 76