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https://github.com/c64scene-ar/llvm-6502.git
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988b78a846
buildbot - do not insert debug intrinsics before phi nodes. Debug info for optimized code: Support variables that are on the stack and described by DBG_VALUEs during their lifetime. Previously, when a variable was at a FrameIndex for any part of its lifetime, this would shadow all other DBG_VALUEs and only a single fbreg location would be emitted, which in fact is only valid for a small range and not the entire lexical scope of the variable. The included dbg-value-const-byref testcase demonstrates this. This patch fixes this by Local - emitting dbg.value intrinsics for allocas that are passed by reference - dropping all dbg.declares (they are now fully lowered to dbg.values) SelectionDAG - renamed constructors for SDDbgValue for better readability. - fix UserValue::match() to handle indirect values correctly - not inserting an MMI table entries for dbg.values that describe allocas. - lowering dbg.values that describe allocas into *indirect* DBG_VALUEs. CodeGenPrepare - leaving dbg.values for an alloca were they are (see comment) Other - regenerated/updated instcombine.ll testcase and included source rdar://problem/16679879 http://reviews.llvm.org/D3374 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@207269 91177308-0d34-0410-b5e6-96231b3b80d8
84 lines
3.9 KiB
LLVM
84 lines
3.9 KiB
LLVM
; ModuleID = 'formal_parameter.c'
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target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.9.0"
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;
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; From (clang -g -c -O1):
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;
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; int lookup(int* map);
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; int verify(int val);
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; void foo(int map)
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; {
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; lookup(&map);
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; if (!verify(map)) { }
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; }
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;
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; RUN: opt %s -O2 -S -o %t
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; RUN: cat %t | FileCheck --check-prefix=LOWERING %s
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; RUN: llc -filetype=obj %t -o - | llvm-dwarfdump -debug-dump=info - | FileCheck %s
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; Test that we only emit only one DW_AT_formal_parameter "map" for this function.
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; rdar://problem/14874886
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;
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; CHECK: DW_TAG_formal_parameter
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; CHECK-NEXT: DW_AT_name {{.*}}map
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; CHECK-NOT: DW_AT_name {{.*}}map
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; Function Attrs: nounwind ssp uwtable
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define void @foo(i32 %map) #0 {
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entry:
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%map.addr = alloca i32, align 4
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store i32 %map, i32* %map.addr, align 4, !tbaa !15
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call void @llvm.dbg.declare(metadata !{i32* %map.addr}, metadata !10), !dbg !14
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%call = call i32 (i32*, ...)* bitcast (i32 (...)* @lookup to i32 (i32*, ...)*)(i32* %map.addr) #3, !dbg !19
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; Ensure that all dbg intrinsics have the same scope after
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; LowerDbgDeclare is finished with them.
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;
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; LOWERING: call void @llvm.dbg.value{{.*}}, !dbg ![[LOC:.*]]
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; LOWERING: call void @llvm.dbg.value{{.*}}, !dbg ![[LOC]]
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; LOWERING: call void @llvm.dbg.value{{.*}}, !dbg ![[LOC]]
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%0 = load i32* %map.addr, align 4, !dbg !20, !tbaa !15
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%call1 = call i32 (i32, ...)* bitcast (i32 (...)* @verify to i32 (i32, ...)*)(i32 %0) #3, !dbg !20
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ret void, !dbg !22
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata) #1
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declare i32 @lookup(...)
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declare i32 @verify(...)
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata) #1
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attributes #0 = { nounwind ssp uwtable }
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attributes #1 = { nounwind readnone }
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attributes #3 = { nounwind }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!11, !12}
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!llvm.ident = !{!13}
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!0 = metadata !{i32 786449, metadata !1, i32 12, metadata !"clang version 3.5.0 ", i1 true, metadata !"", i32 0, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2, metadata !"", i32 1} ; [ DW_TAG_compile_unit ] [formal_parameter.c] [DW_LANG_C99]
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!1 = metadata !{metadata !"formal_parameter.c", metadata !""}
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!2 = metadata !{}
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!3 = metadata !{metadata !4}
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!4 = metadata !{i32 786478, metadata !1, metadata !5, metadata !"foo", metadata !"foo", metadata !"", i32 1, metadata !6, i1 false, i1 true, i32 0, i32 0, null, i32 256, i1 true, void (i32)* @foo, null, null, metadata !9, i32 2} ; [ DW_TAG_subprogram ] [line 1] [def] [scope 2] [foo]
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!5 = metadata !{i32 786473, metadata !1} ; [ DW_TAG_file_type ] [formal_parameter.c]
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!6 = metadata !{i32 786453, i32 0, null, metadata !"", i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !7, i32 0, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = metadata !{null, metadata !8}
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!8 = metadata !{i32 786468, null, null, metadata !"int", i32 0, i64 32, i64 32, i64 0, i32 0, i32 5} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!9 = metadata !{metadata !10}
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!10 = metadata !{i32 786689, metadata !4, metadata !"map", metadata !5, i32 16777217, metadata !8, i32 0, i32 0} ; [ DW_TAG_arg_variable ] [map] [line 1]
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!11 = metadata !{i32 2, metadata !"Dwarf Version", i32 2}
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!12 = metadata !{i32 1, metadata !"Debug Info Version", i32 1}
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!13 = metadata !{metadata !"clang version 3.5.0 "}
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!14 = metadata !{i32 1, i32 0, metadata !4, null}
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!15 = metadata !{metadata !16, metadata !16, i64 0}
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!16 = metadata !{metadata !"int", metadata !17, i64 0}
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!17 = metadata !{metadata !"omnipotent char", metadata !18, i64 0}
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!18 = metadata !{metadata !"Simple C/C++ TBAA"}
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!19 = metadata !{i32 3, i32 0, metadata !4, null}
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!20 = metadata !{i32 4, i32 0, metadata !21, null}
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!21 = metadata !{i32 786443, metadata !1, metadata !4, i32 4, i32 0, i32 0, i32 0} ; [ DW_TAG_lexical_block ] [formal_parameter.c]
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!22 = metadata !{i32 5, i32 0, metadata !4, null}
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