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llvm/test/CodeGen/X86/2011-01-24-DbgValue-Before-Use.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: llc < %s -filetype=obj | llvm-dwarfdump -debug-dump=info - | FileCheck %s
; RUN: llc < %s -filetype=obj -regalloc=basic | llvm-dwarfdump -debug-dump=info - | FileCheck %s
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"
target triple = "x86_64-apple-darwin10.0.0"
; Check debug info for variable z_s
; CHECK: DW_TAG_subprogram
; CHECK: DW_TAG_subprogram
; CHECK: DW_TAG_variable
; CHECK: DW_TAG_variable
; CHECK-NEXT: DW_AT_location
; CHECK-NEXT: DW_AT_name {{.*}} "z_s"
; CHECK-NEXT: DW_AT_decl_file
; CHECK-NEXT: DW_AT_decl_line
; CHECK-NEXT: DW_AT_type{{.*}}{[[TYPE:.*]]}
; CHECK: [[TYPE]]:
; CHECK-NEXT: DW_AT_name {{.*}} "int"
@.str1 = private unnamed_addr constant [14 x i8] c"m=%u, z_s=%d\0A\00"
@str = internal constant [21 x i8] c"Failing test vector:\00"
define i64 @gcd(i64 %a, i64 %b) nounwind readnone optsize noinline ssp {
entry:
tail call void @llvm.dbg.value(metadata !{i64 %a}, i64 0, metadata !10, metadata !{metadata !"0x102"}), !dbg !18
tail call void @llvm.dbg.value(metadata !{i64 %b}, i64 0, metadata !11, metadata !{metadata !"0x102"}), !dbg !19
br label %while.body, !dbg !20
while.body: ; preds = %while.body, %entry
%b.addr.0 = phi i64 [ %b, %entry ], [ %rem, %while.body ]
%a.addr.0 = phi i64 [ %a, %entry ], [ %b.addr.0, %while.body ]
%rem = srem i64 %a.addr.0, %b.addr.0, !dbg !21
%cmp = icmp eq i64 %rem, 0, !dbg !23
br i1 %cmp, label %if.then, label %while.body, !dbg !23
if.then: ; preds = %while.body
tail call void @llvm.dbg.value(metadata !{i64 %rem}, i64 0, metadata !12, metadata !{metadata !"0x102"}), !dbg !21
ret i64 %b.addr.0, !dbg !23
}
define i32 @main() nounwind optsize ssp {
entry:
%call = tail call i32 @rand() nounwind optsize, !dbg !24
tail call void @llvm.dbg.value(metadata !{i32 %call}, i64 0, metadata !14, metadata !{metadata !"0x102"}), !dbg !24
%cmp = icmp ugt i32 %call, 21, !dbg !25
br i1 %cmp, label %cond.true, label %cond.end, !dbg !25
cond.true: ; preds = %entry
%call1 = tail call i32 @rand() nounwind optsize, !dbg !25
br label %cond.end, !dbg !25
cond.end: ; preds = %entry, %cond.true
%cond = phi i32 [ %call1, %cond.true ], [ %call, %entry ], !dbg !25
tail call void @llvm.dbg.value(metadata !{i32 %cond}, i64 0, metadata !17, metadata !{metadata !"0x102"}), !dbg !25
%conv = sext i32 %cond to i64, !dbg !26
%conv5 = zext i32 %call to i64, !dbg !26
%call6 = tail call i64 @gcd(i64 %conv, i64 %conv5) optsize, !dbg !26
%cmp7 = icmp eq i64 %call6, 0
br i1 %cmp7, label %return, label %if.then, !dbg !26
if.then: ; preds = %cond.end
%puts = tail call i32 @puts(i8* getelementptr inbounds ([21 x i8]* @str, i64 0, i64 0))
%call12 = tail call i32 (i8*, ...)* @printf(i8* getelementptr inbounds ([14 x i8]* @.str1, i64 0, i64 0), i32 %call, i32 %cond) nounwind optsize, !dbg !26
ret i32 1, !dbg !27
return: ; preds = %cond.end
ret i32 0, !dbg !27
}
declare i32 @rand() optsize
declare i32 @printf(i8* nocapture, ...) nounwind optsize
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) nounwind readnone
declare i32 @puts(i8* nocapture) nounwind
!llvm.dbg.cu = !{!2}
!llvm.module.flags = !{!33}
!0 = metadata !{metadata !"0x2e\00gcd\00gcd\00\005\000\001\000\006\00256\001\000", metadata !31, metadata !1, metadata !3, null, i64 (i64, i64)* @gcd, null, null, metadata !29} ; [ DW_TAG_subprogram ] [line 5] [def] [scope 0] [gcd]
!1 = metadata !{metadata !"0x29", metadata !31} ; [ DW_TAG_file_type ]
!2 = metadata !{metadata !"0x11\0012\00clang version 2.9 (trunk 124117)\001\00\000\00\001", metadata !31, metadata !32, metadata !32, metadata !28, null, null} ; [ DW_TAG_compile_unit ]
!3 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !31, metadata !1, null, metadata !4, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!4 = metadata !{metadata !5}
!5 = metadata !{metadata !"0x24\00long int\000\0064\0064\000\000\005", null, metadata !2} ; [ DW_TAG_base_type ]
!6 = metadata !{metadata !"0x2e\00main\00main\00\0025\000\001\000\006\000\001\000", metadata !31, metadata !1, metadata !7, null, i32 ()* @main, null, null, metadata !30} ; [ DW_TAG_subprogram ] [line 25] [def] [scope 0] [main]
!7 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", metadata !31, metadata !1, null, metadata !8, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!8 = metadata !{metadata !9}
!9 = metadata !{metadata !"0x24\00int\000\0032\0032\000\000\005", null, metadata !2} ; [ DW_TAG_base_type ]
!10 = metadata !{metadata !"0x101\00a\005\000", metadata !0, metadata !1, metadata !5} ; [ DW_TAG_arg_variable ]
!11 = metadata !{metadata !"0x101\00b\005\000", metadata !0, metadata !1, metadata !5} ; [ DW_TAG_arg_variable ]
!12 = metadata !{metadata !"0x100\00c\006\000", metadata !13, metadata !1, metadata !5} ; [ DW_TAG_auto_variable ]
!13 = metadata !{metadata !"0xb\005\0052\000", metadata !31, metadata !0} ; [ DW_TAG_lexical_block ]
!14 = metadata !{metadata !"0x100\00m\0026\000", metadata !15, metadata !1, metadata !16} ; [ DW_TAG_auto_variable ]
!15 = metadata !{metadata !"0xb\0025\0012\002", metadata !31, metadata !6} ; [ DW_TAG_lexical_block ]
!16 = metadata !{metadata !"0x24\00unsigned int\000\0032\0032\000\000\007", null, metadata !2} ; [ DW_TAG_base_type ]
!17 = metadata !{metadata !"0x100\00z_s\0027\000", metadata !15, metadata !1, metadata !9} ; [ DW_TAG_auto_variable ]
!18 = metadata !{i32 5, i32 41, metadata !0, null}
!19 = metadata !{i32 5, i32 49, metadata !0, null}
!20 = metadata !{i32 7, i32 5, metadata !13, null}
!21 = metadata !{i32 8, i32 9, metadata !22, null}
!22 = metadata !{metadata !"0xb\007\0014\001", metadata !31, metadata !13} ; [ DW_TAG_lexical_block ]
!23 = metadata !{i32 9, i32 9, metadata !22, null}
!24 = metadata !{i32 26, i32 38, metadata !15, null}
!25 = metadata !{i32 27, i32 38, metadata !15, null}
!26 = metadata !{i32 28, i32 9, metadata !15, null}
!27 = metadata !{i32 30, i32 1, metadata !15, null}
!28 = metadata !{metadata !0, metadata !6}
!29 = metadata !{metadata !10, metadata !11, metadata !12}
!30 = metadata !{metadata !14, metadata !17}
!31 = metadata !{metadata !"rem_small.c", metadata !"/private/tmp"}
!32 = metadata !{i32 0}
!33 = metadata !{i32 1, metadata !"Debug Info Version", i32 2}
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