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Emit the entry block first and the exit block second, then all the blocks in between afterwards. This is what gcc always does, and some out of tree tools depend on that.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@223193 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nick Lewycky 2014-12-03 02:45:01 +00:00
parent 61372ea958
commit 92d7d4dcd7
2 changed files with 73 additions and 3 deletions
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10
lib/Transforms/Instrumentation/GCOVProfiling.cpp
View File

@ -310,11 +310,15 @@ namespace {
Function *F = SP.getFunction();
DEBUG(dbgs() << "Function: " << getFunctionName(SP) << "\n");
uint32_t i = 0;
for (Function::iterator BB = F->begin(), E = F->end(); BB != E; ++BB) {
Function::iterator BB = F->begin(), E = F->end();
Blocks[BB++] = new GCOVBlock(0, os);
ReturnBlock = new GCOVBlock(1, os);
uint32_t i = 2;
for (; BB != E; ++BB) {
Blocks[BB] = new GCOVBlock(i++, os);
}
ReturnBlock = new GCOVBlock(i++, os);
std::string FunctionNameAndLine;
raw_string_ostream FNLOS(FunctionNameAndLine);

66
test/Transforms/GCOVProfiling/return-block.ll Normal file
View File

@ -0,0 +1,66 @@
; Inject metadata to set the .gcno file location
; RUN: echo '!19 = metadata !{metadata !"%/T/return-block.ll", metadata !0}' > %t1
; RUN: cat %s %t1 > %t2
; RUN: opt -insert-gcov-profiling -disable-output %t2
; RUN: llvm-cov gcov -n -dump return-block.gcno 2>&1 | FileCheck %s
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-unknown-linux-gnu"
@A = common global i32 0, align 4
; Function Attrs: nounwind uwtable
define void @test() #0 {
entry:
tail call void (...)* @f() #2, !dbg !14
%0 = load i32* @A, align 4, !dbg !15
%tobool = icmp eq i32 %0, 0, !dbg !15
br i1 %tobool, label %if.end, label %if.then, !dbg !15
if.then: ; preds = %entry
tail call void (...)* @g() #2, !dbg !16
br label %if.end, !dbg !16
if.end: ; preds = %entry, %if.then
ret void, !dbg !18
}
declare void @f(...) #1
declare void @g(...) #1
attributes #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" }
attributes #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" }
attributes #2 = { nounwind }
!llvm.gcov = !{!14}
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!11, !12}
!llvm.ident = !{!13}
!0 = metadata !{metadata !"0x11\0012\00clang version 3.6.0 (trunk 223182)\001\00\000\00\001", metadata !1, metadata !2, metadata !2, metadata !3, metadata !8, metadata !2} ; [ DW_TAG_compile_unit ] [return-block.c] [DW_LANG_C99]
!1 = metadata !{metadata !".../llvm/test/Transforms/GCOVProfiling/return-block.ll", metadata !""}
!2 = metadata !{}
!3 = metadata !{metadata !4}
!4 = metadata !{metadata !"0x2e\00test\00test\00\005\000\001\000\000\000\001\005", metadata !1, metadata !5, metadata !6, null, void ()* @test, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 5] [def] [test]
!5 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [return-block.c]
!6 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", null, null, null, metadata !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!7 = metadata !{null}
!8 = metadata !{metadata !9}
!9 = metadata !{metadata !"0x34\00A\00A\00\003\000\001", null, metadata !5, metadata !10, i32* @A, null} ; [ DW_TAG_variable ] [A] [line 3] [def]
!10 = metadata !{metadata !"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]
!11 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!12 = metadata !{i32 2, metadata !"Debug Info Version", i32 2}
!13 = metadata !{metadata !"clang version 3.6.0 (trunk 223182)"}
!14 = metadata !{i32 6, i32 3, metadata !4, null}
!15 = metadata !{i32 7, i32 7, metadata !4, null}
!16 = metadata !{i32 8, i32 5, metadata !17, null}
!17 = metadata !{metadata !"0xb\007\007\000", metadata !1, metadata !4} ; [ DW_TAG_lexical_block ] [return-block.c]
!18 = metadata !{i32 9, i32 1, metadata !4, null}
; There should be no destination edges for block 1.
; CHECK: Block : 0 Counter : 0
; CHECK-NEXT: Destination Edges : 2 (0),
; CHECK-NEXT: Block : 1 Counter : 0
; CHECK-NEXT: Source Edges : 4 (0),
; CHECK-NEXT: Block : 2 Counter : 0