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The inliner needs to fix up debug information for llvm.dbg.declare, not only for llvm.dbg.value.

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Patch by Amjad Aboud

Differential Revision: http://reviews.llvm.org/D6525


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224015 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Michael Kuperstein 2014-12-11 12:41:10 +00:00
parent 0378ed4368
commit 1696b35ff1
2 changed files with 102 additions and 0 deletions
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6
lib/Transforms/Utils/InlineFunction.cpp
View File

@ -872,6 +872,12 @@ static void fixupLineNumbers(Function *Fn, Function::iterator FI,
DVI->setOperand(2, MetadataAsValue::get(
Ctx, createInlinedVariable(DVI->getVariable(),
InlinedAt, Ctx)));
} else if (DbgDeclareInst *DDI = dyn_cast<DbgDeclareInst>(BI)) {
LLVMContext &Ctx = BI->getContext();
MDNode *InlinedAt = BI->getDebugLoc().getInlinedAt(Ctx);
DDI->setOperand(1, MetadataAsValue::get(
Ctx, createInlinedVariable(DDI->getVariable(),
InlinedAt, Ctx)));
}
}
}

96
test/Transforms/Inline/inline_dbg_declare.ll Normal file
View File

@ -0,0 +1,96 @@
; RUN: opt < %s -S -inline | FileCheck %s
;
; The purpose of this test is to check that inline pass preserves debug info
; for variable using the dbg.declare intrinsic.
;
;; This test was generated by running this command:
;; clang.exe -S -O0 -emit-llvm -g foo.c
;;
;; foo.c
;; ==========================
;; float foo(float x)
;; {
;; return x;
;; }
;;
;; void bar(float *dst)
;; {
;; dst[0] = foo(dst[0]);
;; }
;; ==========================
target datalayout = "e-m:w-p:32:32-i64:64-f80:32-n8:16:32-S32"
target triple = "i686-pc-windows-msvc"
; Function Attrs: nounwind
define float @foo(float %x) #0 {
entry:
%x.addr = alloca float, align 4
store float %x, float* %x.addr, align 4
call void @llvm.dbg.declare(metadata !{float* %x.addr}, metadata !16, metadata !17), !dbg !18
%0 = load float* %x.addr, align 4, !dbg !19
ret float %0, !dbg !19
}
; Function Attrs: nounwind readnone
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
; CHECK: define void @bar
; Function Attrs: nounwind
define void @bar(float* %dst) #0 {
entry:
; CHECK: [[x_addr_i:%[a-zA-Z0-9.]+]] = alloca float, align 4
%dst.addr = alloca float*, align 4
store float* %dst, float** %dst.addr, align 4
call void @llvm.dbg.declare(metadata !{float** %dst.addr}, metadata !20, metadata !17), !dbg !21
%0 = load float** %dst.addr, align 4, !dbg !22
%arrayidx = getelementptr inbounds float* %0, i32 0, !dbg !22
%1 = load float* %arrayidx, align 4, !dbg !22
%call = call float @foo(float %1), !dbg !22
; CHECK-NOT: call float @foo
; CHECK: void @llvm.dbg.declare(metadata !{float* [[x_addr_i]]}, metadata [[m23:![0-9]+]], metadata !17), !dbg [[m24:![0-9]+]]
%2 = load float** %dst.addr, align 4, !dbg !22
%arrayidx1 = getelementptr inbounds float* %2, i32 0, !dbg !22
store float %call, float* %arrayidx1, align 4, !dbg !22
ret void, !dbg !23
}
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!13, !14}
!llvm.ident = !{!15}
!0 = metadata !{metadata !"0x11\0012\00clang version 3.6.0 (trunk)\000\00\000\00\001", metadata !1, metadata !2, metadata !2, metadata !3, metadata !2, metadata !2} ; [ DW_TAG_compile_unit ] [foo.c] [DW_LANG_C99]
!1 = metadata !{metadata !"foo.c", metadata !""}
!2 = metadata !{}
!3 = metadata !{metadata !4, metadata !9}
!4 = metadata !{metadata !"0x2e\00foo\00foo\00\001\000\001\000\000\00256\000\002", metadata !1, metadata !5, metadata !6, null, float (float)* @foo, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 1] [def] [scope 2] [foo]
!5 = metadata !{metadata !"0x29", metadata !1} ; [ DW_TAG_file_type ] [foo.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 !{metadata !8, metadata !8}
!8 = metadata !{metadata !"0x24\00float\000\0032\0032\000\000\004", null, null} ; [ DW_TAG_base_type ] [float] [line 0, size 32, align 32, offset 0, enc DW_ATE_float]
!9 = metadata !{metadata !"0x2e\00bar\00bar\00\006\000\001\000\000\00256\000\007", metadata !1, metadata !5, metadata !10, null, void (float*)* @bar, null, null, metadata !2} ; [ DW_TAG_subprogram ] [line 6] [def] [scope 7] [bar]
!10 = metadata !{metadata !"0x15\00\000\000\000\000\000\000", null, null, null, metadata !11, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
!11 = metadata !{null, metadata !12}
!12 = metadata !{metadata !"0xf\00\000\0032\0032\000\000", null, null, metadata !8} ; [ DW_TAG_pointer_type ] [line 0, size 32, align 32, offset 0] [from float]
!13 = metadata !{i32 2, metadata !"Dwarf Version", i32 4}
!14 = metadata !{i32 2, metadata !"Debug Info Version", i32 2}
!15 = metadata !{metadata !"clang version 3.6.0 (trunk)"}
!16 = metadata !{metadata !"0x101\00x\0016777217\000", metadata !4, metadata !5, metadata !8} ; [ DW_TAG_arg_variable ] [x] [line 1]
!17 = metadata !{metadata !"0x102"} ; [ DW_TAG_expression ]
!18 = metadata !{i32 1, i32 17, metadata !4, null}
!19 = metadata !{i32 3, i32 5, metadata !4, null}
!20 = metadata !{metadata !"0x101\00dst\0016777222\000", metadata !9, metadata !5, metadata !12} ; [ DW_TAG_arg_variable ] [dst] [line 6]
!21 = metadata !{i32 6, i32 17, metadata !9, null}
!22 = metadata !{i32 8, i32 14, metadata !9, null}
!23 = metadata !{i32 9, i32 1, metadata !9, null}
; CHECK: [[m23]] = metadata !{metadata !"0x101\00x\0016777217\000", metadata !4, metadata !5, metadata !8, metadata !22} ; [ DW_TAG_arg_variable ] [x] [line 1]
; CHECK: [[m24]] = metadata !{i32 1, i32 17, metadata !4, metadata !22}