80d3a4c39f
This patch re-implements a variety of debug-info maintenence functions to use DPValues instead of DbgValueInst's: supporting the "new" non-intrinsic representation of debug-info. As per [0], we need to have parallel implementations of various utilities for a time, and these are the most fundamental utilities used throughout the compiler. I've added --try-experimental-debuginfo-iterators to a variety of RUN lines: this is a flag that turns on "new debug-info" if it's built into LLVM, and not otherwise. This should ensure that we have the same behaviour for the same IR inputs, but using a different internal representation. For the most part these changes affect SROA/Mem2Reg promotion of dbg.declares into dbg.value intrinsics (now DPValues), we're leaving dbg.declares as instructions until later in the day. There's also some salvaging changes made. I believe the tests that I've added cover almost all the code being updated here. The only thing I'm not confident about is SimplifyCFG, which calls rewriteDebugUsers down a variety of code paths. Those changes can't immediately get full coverage as an additional patch is needed that updates handling of Unreachable instructions, will upload that shortly. [0] https://discourse.llvm.org/t/rfc-instruction-api-changes-needed-to-eliminate-debug-intrinsics-from-ir/68939/9
33 lines
1.7 KiB
LLVM
33 lines
1.7 KiB
LLVM
; RUN: opt -passes=adce %s -S -o - | FileCheck %s
|
|
; RUN: opt -passes=bdce %s -S -o - | FileCheck %s
|
|
; RUN: opt -passes=adce %s -S -o - --try-experimental-debuginfo-iterators | FileCheck %s
|
|
; RUN: opt -passes=bdce %s -S -o - --try-experimental-debuginfo-iterators | FileCheck %s
|
|
target datalayout = "e-m:o-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
|
target triple = "x86_64-apple-macosx"
|
|
define void @f(i32) !dbg !8 {
|
|
entry:
|
|
%p_x = inttoptr i32 %0 to ptr
|
|
%i_x = ptrtoint ptr %p_x to i32
|
|
; CHECK: call void @llvm.dbg.value(metadata i32 %0,
|
|
; CHECK-SAME: !DIExpression(DW_OP_LLVM_convert, 32, DW_ATE_unsigned,
|
|
; CHECK-SAME: DW_OP_LLVM_convert, 64, DW_ATE_unsigned,
|
|
; CHECK-SAME: DW_OP_LLVM_convert, 64, DW_ATE_unsigned,
|
|
; CHECK-SAME: DW_OP_LLVM_convert, 32, DW_ATE_unsigned, DW_OP_stack_value))
|
|
call void @llvm.dbg.value(metadata i32 %i_x, metadata !11, metadata !DIExpression()), !dbg !13
|
|
ret void, !dbg !13
|
|
}
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata)
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!3, !4}
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, emissionKind: FullDebug)
|
|
!1 = !DIFile(filename: "salavage.c", directory: "/")
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
|
!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 1, type: !9, isLocal: false, isDefinition: true, scopeLine: 1, isOptimized: false, unit: !0)
|
|
!9 = !DISubroutineType(types: !10)
|
|
!10 = !{null}
|
|
!11 = !DILocalVariable(name: "x", scope: !8, file: !1, line: 2, type: !12)
|
|
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
|
!13 = !DILocation(line: 1, column: 1, scope: !8)
|