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llvm-6502/test/DebugInfo/inline-debug-info.ll
Duncan P. N. Exon Smith 83902832de Revert "Revert "DI: Fold constant arguments into a single MDString"" 
This reverts commit r218918, effectively reapplying r218914 after fixing
an Ocaml bindings test and an Asan crash.  The root cause of the latter
was a tightened-up check in `DILexicalBlock::Verify()`, so I'll file a
PR to investigate who requires the loose check (and why).

Original commit message follows.

--

This patch addresses the first stage of PR17891 by folding constant
arguments together into a single MDString.  Integers are stringified and
a `\0` character is used as a separator.

Part of PR17891.

Note: I've attached my testcases upgrade scripts to the PR.  If I've
just broken your out-of-tree testcases, they might help.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219010 91177308-0d34-0410-b5e6-96231b3b80d8
2014-10-03 20:01:09 +00:00

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; RUN: opt -inline -S < %s | FileCheck %s
; Created from source
;
;
; 1 // test.cpp
; 2 extern int global_var;
; 3 extern int test_ext(int k);
; 4 int test (int k) {
; 5 int k2 = test_ext(k);
; 6 if (k2 > 100)
; 7 return k2;
; 8 return 0;
; 9 }
; 10
; 11 int test2() {
; 12 try
; 13 {
; 14 test(global_var);
; 15 }
; 16 catch (int e) {
; 17 global_var = 0;
; 18 }
; 19 global_var = 1;
; 20 return 0;
; 21 }
; CHECK: _Z4testi.exit:
; Make sure the branch instruction created during inlining has a debug location,
; so the range of the inlined function is correct.
; CHECK: br label %invoke.cont, !dbg ![[MD:[0-9]+]]
; The branch instruction has the source location of line 9 and its inlined location
; has the source location of line 14.
; CHECK: ![[INL:[0-9]+]] = metadata !{i32 14, i32 0, metadata {{.*}}, null}
; CHECK: ![[MD]] = metadata !{i32 9, i32 0, metadata {{.*}}, metadata ![[INL]]}
; ModuleID = 'test.cpp'
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
target triple = "x86_64-apple-darwin12.0.0"
@_ZTIi = external constant i8*
@global_var = external global i32
define i32 @_Z4testi(i32 %k) {
entry:
%retval = alloca i32, align 4
%k.addr = alloca i32, align 4
%k2 = alloca i32, align 4
store i32 %k, i32* %k.addr, align 4
call void @llvm.dbg.declare(metadata !{i32* %k.addr}, metadata !13, metadata !{metadata !"0x102"}), !dbg !14
call void @llvm.dbg.declare(metadata !{i32* %k2}, metadata !15, metadata !{metadata !"0x102"}), !dbg !16
%0 = load i32* %k.addr, align 4, !dbg !16
%call = call i32 @_Z8test_exti(i32 %0), !dbg !16
store i32 %call, i32* %k2, align 4, !dbg !16
%1 = load i32* %k2, align 4, !dbg !17
%cmp = icmp sgt i32 %1, 100, !dbg !17
br i1 %cmp, label %if.then, label %if.end, !dbg !17
if.then: ; preds = %entry
%2 = load i32* %k2, align 4, !dbg !18
store i32 %2, i32* %retval, !dbg !18
br label %return, !dbg !18
if.end: ; preds = %entry
store i32 0, i32* %retval, !dbg !19
br label %return, !dbg !19
return: ; preds = %if.end, %if.then
%3 = load i32* %retval, !dbg !20
ret i32 %3, !dbg !20
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
declare i32 @_Z8test_exti(i32)
define i32 @_Z5test2v() {
entry:
%exn.slot = alloca i8*
%ehselector.slot = alloca i32
%e = alloca i32, align 4
%0 = load i32* @global_var, align 4, !dbg !21
%call = invoke i32 @_Z4testi(i32 %0)
to label %invoke.cont unwind label %lpad, !dbg !21
invoke.cont: ; preds = %entry
br label %try.cont, !dbg !23
lpad: ; preds = %entry
%1 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
catch i8* bitcast (i8** @_ZTIi to i8*), !dbg !21
%2 = extractvalue { i8*, i32 } %1, 0, !dbg !21
store i8* %2, i8** %exn.slot, !dbg !21
%3 = extractvalue { i8*, i32 } %1, 1, !dbg !21
store i32 %3, i32* %ehselector.slot, !dbg !21
br label %catch.dispatch, !dbg !21
catch.dispatch: ; preds = %lpad
%sel = load i32* %ehselector.slot, !dbg !23
%4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #2, !dbg !23
%matches = icmp eq i32 %sel, %4, !dbg !23
br i1 %matches, label %catch, label %eh.resume, !dbg !23
catch: ; preds = %catch.dispatch
call void @llvm.dbg.declare(metadata !{i32* %e}, metadata !24, metadata !{metadata !"0x102"}), !dbg !25
%exn = load i8** %exn.slot, !dbg !23
%5 = call i8* @__cxa_begin_catch(i8* %exn) #2, !dbg !23
%6 = bitcast i8* %5 to i32*, !dbg !23
%7 = load i32* %6, align 4, !dbg !23
store i32 %7, i32* %e, align 4, !dbg !23
store i32 0, i32* @global_var, align 4, !dbg !26
call void @__cxa_end_catch() #2, !dbg !28
br label %try.cont, !dbg !28
try.cont: ; preds = %catch, %invoke.cont
store i32 1, i32* @global_var, align 4, !dbg !29
ret i32 0, !dbg !30
eh.resume: ; preds = %catch.dispatch
%exn1 = load i8** %exn.slot, !dbg !23
%sel2 = load i32* %ehselector.slot, !dbg !23
%lpad.val = insertvalue { i8*, i32 } undef, i8* %exn1, 0, !dbg !23
%lpad.val3 = insertvalue { i8*, i32 } %lpad.val, i32 %sel2, 1, !dbg !23
resume { i8*, i32 } %lpad.val3, !dbg !23
}
declare i32 @__gxx_personality_v0(...)
; Function Attrs: nounwind readnone
declare i32 @llvm.eh.typeid.for(i8*) #1
declare i8* @__cxa_begin_catch(i8*)
declare void @__cxa_end_catch()
attributes #1 = { nounwind readnone }
attributes #2 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!31}
!0 = metadata !{metadata !"0x11\004\00clang version 3.3 \000\00\000\00\000", metadata !1, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2} ; [ DW_TAG_compile_unit ] [<unknown>] [DW_LANG_C_plus_plus]
!1 = metadata !{metadata !"<unknown>", metadata !""}
!2 = metadata !{i32 0}
!3 = metadata !{metadata !4, metadata !10}
!4 = metadata !{metadata !"0x2e\00test\00test\00_Z4testi\004\000\001\000\006\00256\000\004", metadata !5, metadata !6, metadata !7, null, i32 (i32)* @_Z4testi, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 4] [def] [test]
!5 = metadata !{metadata !"test.cpp", metadata !""}
!6 = metadata !{metadata !"0x29", metadata !5} ; [ DW_TAG_file_type ] [test.cpp]
!7 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !8, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!8 = metadata !{metadata !9, metadata !9}
!9 = 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]
!10 = metadata !{metadata !"0x2e\00test2\00test2\00_Z5test2v\0011\000\001\000\006\00256\000\0011", metadata !5, metadata !6, metadata !11, null, i32 ()* @_Z5test2v, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 11] [def] [test2]
!11 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", i32 0, null, null, metadata !12, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!12 = metadata !{metadata !9}
!13 = metadata !{metadata !"0x101\00k\0016777220\000", metadata !4, metadata !6, metadata !9} ; [ DW_TAG_arg_variable ] [k] [line 4]
!14 = metadata !{i32 4, i32 0, metadata !4, null}
!15 = metadata !{metadata !"0x100\00k2\005\000", metadata !4, metadata !6, metadata !9} ; [ DW_TAG_auto_variable ] [k2] [line 5]
!16 = metadata !{i32 5, i32 0, metadata !4, null}
!17 = metadata !{i32 6, i32 0, metadata !4, null}
!18 = metadata !{i32 7, i32 0, metadata !4, null}
!19 = metadata !{i32 8, i32 0, metadata !4, null}
!20 = metadata !{i32 9, i32 0, metadata !4, null}
!21 = metadata !{i32 14, i32 0, metadata !22, null}
!22 = metadata !{metadata !"0xb\0013\000\000", metadata !5, metadata !10} ; [ DW_TAG_lexical_block ] [test.cpp]
!23 = metadata !{i32 15, i32 0, metadata !22, null}
!24 = metadata !{metadata !"0x100\00e\0016\000", metadata !10, metadata !6, metadata !9} ; [ DW_TAG_auto_variable ] [e] [line 16]
!25 = metadata !{i32 16, i32 0, metadata !10, null}
!26 = metadata !{i32 17, i32 0, metadata !27, null}
!27 = metadata !{metadata !"0xb\0016\000\001", metadata !5, metadata !10} ; [ DW_TAG_lexical_block ] [test.cpp]
!28 = metadata !{i32 18, i32 0, metadata !27, null}
!29 = metadata !{i32 19, i32 0, metadata !10, null}
!30 = metadata !{i32 20, i32 0, metadata !10, null}
!31 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
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