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https://github.com/c64scene-ar/llvm-6502.git
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211422d4c3
Summary: At the moment, address calculation is taking the debug line info from the address node (e.g. TargetGlobalAddress). When a function is called multiple times, this results in output of the form: .loc $first_call_location .. address calculation .. .. function call .. .. address calculation .. .loc $second_call_location .. function call .. .loc $first_call_location .. address calculation .. .loc $third_call_location .. function call .. This patch makes address calculations for function calls take the debug line info for the call node and results in output of the form: .loc $first_call_location .. address calculation .. .. function call .. .loc $second_call_location .. address calculation .. .. function call .. .loc $third_call_location .. address calculation .. .. function call .. All other address calculations continue to use the address node. Test Plan: Fixes test/DebugInfo/multiline.ll on a mips host. Subscribers: dblaikie, llvm-commits Differential Revision: http://reviews.llvm.org/D7050 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@227005 91177308-0d34-0410-b5e6-96231b3b80d8
85 lines
3.1 KiB
LLVM
85 lines
3.1 KiB
LLVM
; RUN: llc -mtriple=mips-linux-gnu -filetype=asm -asm-verbose=0 -O0 < %s | FileCheck %s
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; RUN: llc -mtriple=mips-linux-gnu -filetype=obj -O0 < %s | llvm-dwarfdump -debug-dump=line - | FileCheck %s --check-prefix=INT
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; Mips used to generate 'jumpy' debug line info around calls. The address
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; calculation for each call to f1() would share the same line info so it would
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; emit output of the form:
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; .loc $first_call_location
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; .. address calculation ..
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; .. function call ..
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; .. address calculation ..
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; .loc $second_call_location
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; .. function call ..
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; .loc $first_call_location
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; .. address calculation ..
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; .loc $third_call_location
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; .. function call ..
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; ...
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; which would cause confusing stepping behaviour for the end user.
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;
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; This test checks that we emit more user friendly debug line info of the form:
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; .loc $first_call_location
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; .. address calculation ..
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; .. function call ..
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; .loc $second_call_location
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; .. address calculation ..
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; .. function call ..
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; .loc $third_call_location
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; .. address calculation ..
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; .. function call ..
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; ...
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;
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; Generated with clang from fn-call-line.c:
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; void f1();
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; void f2() {
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; f1();
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; f1();
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; }
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; CHECK: .loc 1 3 3
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; CHECK-NOT: .loc
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; CHECK: %call16(f1)
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; CHECK-NOT: .loc
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; CHECK: .loc 1 4 3
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; CHECK-NOT: .loc
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; CHECK: %call16(f1)
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; INT: {{^}}Address
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; INT: -----
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; INT-NEXT: 2 0 1 0 0 is_stmt{{$}}
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; INT-NEXT: 3 3 1 0 0 is_stmt prologue_end{{$}}
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; INT-NEXT: 4 3 1 0 0 is_stmt{{$}}
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; Function Attrs: nounwind uwtable
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define void @f2() #0 {
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entry:
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call void (...)* @f1(), !dbg !11
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call void (...)* @f1(), !dbg !12
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ret void, !dbg !13
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}
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declare void @f1(...) #1
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attributes #0 = { nounwind uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!8, !9}
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!llvm.ident = !{!10}
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!0 = !{!"0x11\0012\00clang version 3.7.0 (trunk 226641)\000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/tmp/dbginfo/fn-call-line.c] [DW_LANG_C99]
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!1 = !{!"fn-call-line.c", !"/tmp/dbginfo"}
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!2 = !{}
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!3 = !{!4}
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!4 = !{!"0x2e\00f2\00f2\00\002\000\001\000\000\000\000\002", !1, !5, !6, null, void ()* @f2, null, null, !2} ; [ DW_TAG_subprogram ] [line 2] [def] [f2]
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!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/tmp/dbginfo/fn-call-line.c]
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!6 = !{!"0x15\00\000\000\000\000\000\000", null, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = !{null}
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!8 = !{i32 2, !"Dwarf Version", i32 4}
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!9 = !{i32 2, !"Debug Info Version", i32 2}
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!10 = !{!"clang version 3.7.0 (trunk 226641)"}
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!11 = !MDLocation(line: 3, column: 3, scope: !4)
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!12 = !MDLocation(line: 4, column: 3, scope: !4)
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!13 = !MDLocation(line: 5, column: 1, scope: !4)
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