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llvm-project/llvm/test/CodeGen/WebAssembly/dbgvalue.ll

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Improve virtual register handling when computing debug information Summary: Some backends, like WebAssembly, use virtual registers instead of physical registers. This crashes the DbgValueHistoryCalculator pass, which assumes that all registers are physical. Instead, skip virtual registers when iterating aliases, and assume that they are clobbered. Reviewers: dexonsmith, dschuff, aprantl Subscribers: yurydelendik, llvm-commits, jfb, sunfish Differential Revision: https://reviews.llvm.org/D22590 llvm-svn: 278371
2016-08-12 01:52:40 +08:00
; RUN: llc < %s -O0 -verify-machineinstrs -mtriple=wasm32-unknown-unknown | FileCheck %s
[Webassembly] disable unstable test. It reads uninitialized memory and crashes randomly. llvm-svn: 278495
2016-08-12 18:13:45 +08:00
Improve virtual register handling when computing debug information Summary: Some backends, like WebAssembly, use virtual registers instead of physical registers. This crashes the DbgValueHistoryCalculator pass, which assumes that all registers are physical. Instead, skip virtual registers when iterating aliases, and assume that they are clobbered. Reviewers: dexonsmith, dschuff, aprantl Subscribers: yurydelendik, llvm-commits, jfb, sunfish Differential Revision: https://reviews.llvm.org/D22590 llvm-svn: 278371
2016-08-12 01:52:40 +08:00
; CHECK: BB#0
; CHECK: #DEBUG_VALUE: usage:self <- %vreg4
; CHECK: BB#1
; CHECK: DW_TAG_variable
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown"
%0 = type opaque
@key = external local_unnamed_addr global [15 x i8], align 1
@.str = external unnamed_addr constant [33 x i8], align 1
; Function Attrs: nounwind
define internal i32 @0(i8*) local_unnamed_addr !dbg !14 !type !22 {
tail call void @llvm.dbg.value(metadata i8* %0, i64 0, metadata !21, metadata !23), !dbg !24
%2 = tail call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([33 x i8], [33 x i8]* @.str, i32 0, i32 0), i8* %0), !dbg !25
br i1 1, label %a, label %b
a:
%3 = add i32 %2, %2
br label %c
b:
%4 = sub i32 %2, %2
br label %c
c:
%5 = phi i32 [ %3, %a ], [ %4, %b ]
%6 = add i32 ptrtoint (i32 (i8*)* @0 to i32), %5
ret i32 %6, !dbg !26
}
; Function Attrs: nounwind
declare i32 @printf(i8* nocapture readonly, ...) local_unnamed_addr
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata)
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!11, !12}
!llvm.ident = !{!13}
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.9.0 (trunk 273884) (llvm/trunk 273897)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2, globals: !3)
!1 = !DIFile(filename: "crash.c", directory: "wasm/tests")
!2 = !{}
!3 = !{!4}
Revert "[IR] Remove the DIExpression field from DIGlobalVariable." This reverts commit 289920 (again). I forgot to implement a Bitcode upgrade for the case where a DIGlobalVariable has not DIExpression. Unfortunately it is not possible to safely upgrade these variables without adding a flag to the bitcode record indicating which version they are. My plan of record is to roll the planned follow-up patch that adds a unit: field to DIGlobalVariable into this patch before recomitting. This way we only need one Bitcode upgrade for both changes (with a version flag in the bitcode record to safely distinguish the record formats). Sorry for the churn! llvm-svn: 289982
2016-12-17 03:39:01 +08:00
!4 = distinct !DIGlobalVariable(name: "key", scope: !0, file: !1, line: 7, type: !5, isLocal: false, isDefinition: true)
Improve virtual register handling when computing debug information Summary: Some backends, like WebAssembly, use virtual registers instead of physical registers. This crashes the DbgValueHistoryCalculator pass, which assumes that all registers are physical. Instead, skip virtual registers when iterating aliases, and assume that they are clobbered. Reviewers: dexonsmith, dschuff, aprantl Subscribers: yurydelendik, llvm-commits, jfb, sunfish Differential Revision: https://reviews.llvm.org/D22590 llvm-svn: 278371
2016-08-12 01:52:40 +08:00
!5 = !DICompositeType(tag: DW_TAG_array_type, baseType: !6, size: 120, align: 8, elements: !9)
!6 = !DIDerivedType(tag: DW_TAG_typedef, name: "uint8_t", file: !7, line: 185, baseType: !8)
!7 = !DIFile(filename: "wasm/emscripten/system/include/libc/bits/alltypes.h", directory: "wasm/tests")
!8 = !DIBasicType(name: "unsigned char", size: 8, align: 8, encoding: DW_ATE_unsigned_char)
!9 = !{!10}
!10 = !DISubrange(count: 15)
!11 = !{i32 2, !"Dwarf Version", i32 4}
!12 = !{i32 2, !"Debug Info Version", i32 3}
!13 = !{!"clang version 3.9.0 (trunk 273884) (llvm/trunk 273897)"}
!14 = distinct !DISubprogram(name: "usage", scope: !1, file: !1, line: 15, type: !15, isLocal: false, isDefinition: true, scopeLine: 15, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !20)
!15 = !DISubroutineType(types: !16)
!16 = !{!17, !18}
!17 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!18 = !DIDerivedType(tag: DW_TAG_pointer_type, baseType: !19, size: 32, align: 32)
!19 = !DIBasicType(name: "char", size: 8, align: 8, encoding: DW_ATE_signed_char)
!20 = !{!21}
!21 = !DILocalVariable(name: "self", arg: 1, scope: !14, file: !1, line: 15, type: !18)
!22 = !{i64 0, !"_ZTSFiPcE"}
!23 = !DIExpression()
!24 = !DILocation(line: 15, column: 17, scope: !14)
!25 = !DILocation(line: 16, column: 3, scope: !14)
!26 = !DILocation(line: 17, column: 3, scope: !14)