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
27 lines
1.1 KiB
LLVM
27 lines
1.1 KiB
LLVM
; RUN: opt %s -passes=debugify,early-cse -earlycse-debug-hash -S | FileCheck %s
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; RUN: opt %s -passes=debugify,early-cse -earlycse-debug-hash -S --try-experimental-debuginfo-iterators | FileCheck %s
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define i32 @foo(i64 %nose, i32 %more) {
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; CHECK-LABEL: @foo(
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; CHECK: call void @llvm.dbg.value(metadata i64 %nose, metadata [[V1:![0-9]+]], metadata !DIExpression(DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned
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; CHECK: call void @llvm.dbg.value(metadata i64 %nose.shift, metadata [[V2:![0-9]+]]
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; CHECK: call void @llvm.dbg.value(metadata i64 %nose.shift, metadata [[V3:![0-9]+]], metadata !DIExpression(DW_OP_LLVM_convert, 64, DW_ATE_unsigned, DW_OP_LLVM_convert, 32, DW_ATE_unsigned
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entry:
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%nose.trunc = trunc i64 %nose to i32
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%nose.shift = lshr i64 %nose, 32
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%nose.trunc.2 = trunc i64 %nose.shift to i32
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%add = add nsw i32 %more, 1
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ret i32 %add
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}
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!llvm.module.flags = !{!0, !1}
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!llvm.ident = !{!2}
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!0 = !{i32 1, !"wchar_size", i32 2}
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!1 = !{i32 7, !"PIC Level", i32 2}
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!2 = !{!"clang version 10.0.0 "}
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; CHECK: [[V1]] = !DILocalVariable(
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; CHECK: [[V2]] = !DILocalVariable(
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; CHECK: [[V3]] = !DILocalVariable(
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