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llvm-mirror/test/DebugInfo/X86/debug-ranges-offset.ll
Daniel Neilson f59acc15ad Remove alignment argument from memcpy/memmove/memset in favour of alignment attributes (Step 1) 
Summary:
 This is a resurrection of work first proposed and discussed in Aug 2015:
   http://lists.llvm.org/pipermail/llvm-dev/2015-August/089384.html
and initially landed (but then backed out) in Nov 2015:
   http://lists.llvm.org/pipermail/llvm-commits/Week-of-Mon-20151109/312083.html

 The @llvm.memcpy/memmove/memset intrinsics currently have an explicit argument
which is required to be a constant integer. It represents the alignment of the
dest (and source), and so must be the minimum of the actual alignment of the
two.

 This change is the first in a series that allows source and dest to each
have their own alignments by using the alignment attribute on their arguments.

 In this change we:
1) Remove the alignment argument.
2) Add alignment attributes to the source & dest arguments. We, temporarily,
   require that the alignments for source & dest be equal.

 For example, code which used to read:
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %dest, i8* %src, i32 100, i32 4, i1 false)
will now read
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* align 4 %dest, i8* align 4 %src, i32 100, i1 false)

 Downstream users may have to update their lit tests that check for
@llvm.memcpy/memmove/memset call/declaration patterns. The following extended sed script
may help with updating the majority of your tests, but it does not catch all possible
patterns so some manual checking and updating will be required.

s~declare void @llvm\.mem(set|cpy|move)\.p([^(]*)\((.*), i32, i1\)~declare void @llvm.mem\1.p\2(\3, i1)~g
s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* \3, i8 \4, i8 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* \3, i8 \4, i16 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* \3, i8 \4, i32 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* \3, i8 \4, i64 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* \3, i8 \4, i128 \5, i1 \6)~g
s~call void @llvm\.memset\.p([^(]*)i8\(i8([^*]*)\* (.*), i8 (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i8(i8\2* align \6 \3, i8 \4, i8 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i16\(i8([^*]*)\* (.*), i8 (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i16(i8\2* align \6 \3, i8 \4, i16 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i32\(i8([^*]*)\* (.*), i8 (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i32(i8\2* align \6 \3, i8 \4, i32 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i64\(i8([^*]*)\* (.*), i8 (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i64(i8\2* align \6 \3, i8 \4, i64 \5, i1 \7)~g
s~call void @llvm\.memset\.p([^(]*)i128\(i8([^*]*)\* (.*), i8 (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.memset.p\1i128(i8\2* align \6 \3, i8 \4, i128 \5, i1 \7)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* \4, i8\5* \6, i8 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* \4, i8\5* \6, i16 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* \4, i8\5* \6, i32 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* \4, i8\5* \6, i64 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 [01], i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* \4, i8\5* \6, i128 \7, i1 \8)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i8\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i8 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i8(i8\3* align \8 \4, i8\5* align \8 \6, i8 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i16\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i16 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i16(i8\3* align \8 \4, i8\5* align \8 \6, i16 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i32\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i32 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i32(i8\3* align \8 \4, i8\5* align \8 \6, i32 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i64\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i64 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i64(i8\3* align \8 \4, i8\5* align \8 \6, i64 \7, i1 \9)~g
s~call void @llvm\.mem(cpy|move)\.p([^(]*)i128\(i8([^*]*)\* (.*), i8([^*]*)\* (.*), i128 (.*), i32 ([0-9]*), i1 ([^)]*)\)~call void @llvm.mem\1.p\2i128(i8\3* align \8 \4, i8\5* align \8 \6, i128 \7, i1 \9)~g

 The remaining changes in the series will:
Step 2) Expand the IRBuilder API to allow creation of memcpy/memmove with differing
   source and dest alignments.
Step 3) Update Clang to use the new IRBuilder API.
Step 4) Update Polly to use the new IRBuilder API.
Step 5) Update LLVM passes that create memcpy/memmove calls to use the new IRBuilder API,
        and those that use use MemIntrinsicInst::[get|set]Alignment() to use
        getDestAlignment() and getSourceAlignment() instead.
Step 6) Remove the single-alignment IRBuilder API for memcpy/memmove, and the
        MemIntrinsicInst::[get|set]Alignment() methods.

Reviewers: pete, hfinkel, lhames, reames, bollu

Reviewed By: reames

Subscribers: niosHD, reames, jholewinski, qcolombet, jfb, sanjoy, arsenm, dschuff, dylanmckay, mehdi_amini, sdardis, nemanjai, david2050, nhaehnle, javed.absar, sbc100, jgravelle-google, eraman, aheejin, kbarton, JDevlieghere, asb, rbar, johnrusso, simoncook, jordy.potman.lists, apazos, sabuasal, llvm-commits

Differential Revision: https://reviews.llvm.org/D41675

llvm-svn: 322965
2018-01-19 17:13:12 +00:00

241 lines
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LLVM
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; RUN: llc -filetype=obj -mtriple=x86_64-pc-linux-gnu %s -o %t
; RUN: llvm-readobj --relocations %t | FileCheck %s
; Check that we don't have any relocations in the ranges section -
; to show that we're producing this as a relative offset to the
; low_pc for the compile unit.
; CHECK-NOT: .rela.debug_ranges
@llvm.global_ctors = appending global [1 x { i32, void ()* }] [{ i32, void ()* } { i32 0, void ()* @__msan_init }]
@str = private unnamed_addr constant [4 x i8] c"zzz\00"
@__msan_retval_tls = external thread_local(initialexec) global [8 x i64]
@__msan_retval_origin_tls = external thread_local(initialexec) global i32
@__msan_param_tls = external thread_local(initialexec) global [1000 x i64]
@__msan_param_origin_tls = external thread_local(initialexec) global [1000 x i32]
@__msan_va_arg_tls = external thread_local(initialexec) global [1000 x i64]
@__msan_va_arg_overflow_size_tls = external thread_local(initialexec) global i64
@__msan_origin_tls = external thread_local(initialexec) global i32
@__executable_start = external hidden global i32
@_end = external hidden global i32
; Function Attrs: sanitize_memory uwtable
define void @_Z1fv() #0 !dbg !4 {
entry:
%p = alloca i32*, align 8
%0 = ptrtoint i32** %p to i64, !dbg !19
%1 = and i64 %0, -70368744177672, !dbg !19
%2 = inttoptr i64 %1 to i64*, !dbg !19
store i64 -1, i64* %2, align 8, !dbg !19
store i64 0, i64* getelementptr inbounds ([1000 x i64], [1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !19
store i64 0, i64* getelementptr inbounds ([8 x i64], [8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !19
%call = call i8* @_Znwm(i64 4) #4, !dbg !19
%_msret = load i64, i64* getelementptr inbounds ([8 x i64], [8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !19
%3 = bitcast i8* %call to i32*, !dbg !19
tail call void @llvm.dbg.value(metadata i32* %3, metadata !9, metadata !DIExpression()), !dbg !19
%4 = inttoptr i64 %1 to i64*, !dbg !19
store i64 %_msret, i64* %4, align 8, !dbg !19
store volatile i32* %3, i32** %p, align 8, !dbg !19
tail call void @llvm.dbg.value(metadata i32** %p, metadata !9, metadata !DIExpression()), !dbg !19
%p.0.p.0. = load volatile i32*, i32** %p, align 8, !dbg !20
%_msld = load i64, i64* %4, align 8, !dbg !20
%_mscmp = icmp eq i64 %_msld, 0, !dbg !20
br i1 %_mscmp, label %6, label %5, !dbg !20, !prof !22
; <label>:5 ; preds = %entry
call void @__msan_warning_noreturn(), !dbg !20
call void asm sideeffect "", ""() #3, !dbg !20
unreachable, !dbg !20
; <label>:6 ; preds = %entry
%7 = load i32, i32* %p.0.p.0., align 4, !dbg !20, !tbaa !23
%8 = ptrtoint i32* %p.0.p.0. to i64, !dbg !20
%9 = and i64 %8, -70368744177665, !dbg !20
%10 = inttoptr i64 %9 to i32*, !dbg !20
%_msld2 = load i32, i32* %10, align 4, !dbg !20
%11 = icmp ne i32 %_msld2, 0, !dbg !20
%12 = xor i32 %_msld2, -1, !dbg !20
%13 = and i32 %7, %12, !dbg !20
%14 = icmp eq i32 %13, 0, !dbg !20
%_msprop_icmp = and i1 %11, %14, !dbg !20
br i1 %_msprop_icmp, label %15, label %16, !dbg !20, !prof !27
; <label>:15 ; preds = %6
call void @__msan_warning_noreturn(), !dbg !20
call void asm sideeffect "", ""() #3, !dbg !20
unreachable, !dbg !20
; <label>:16 ; preds = %6
%tobool = icmp eq i32 %7, 0, !dbg !20
br i1 %tobool, label %if.end, label %if.then, !dbg !20
if.then: ; preds = %16
store i64 0, i64* getelementptr inbounds ([1000 x i64], [1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !28
store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !28
%puts = call i32 @puts(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @str, i64 0, i64 0)), !dbg !28
br label %if.end, !dbg !28
if.end: ; preds = %16, %if.then
ret void, !dbg !29
}
; Function Attrs: nobuiltin
declare i8* @_Znwm(i64) #1
; Function Attrs: sanitize_memory uwtable
define i32 @main() #0 !dbg !13 {
entry:
%p.i = alloca i32*, align 8
%0 = ptrtoint i32** %p.i to i64, !dbg !30
%1 = and i64 %0, -70368744177672, !dbg !30
%2 = inttoptr i64 %1 to i64*, !dbg !30
store i64 -1, i64* %2, align 8, !dbg !30
%p.i.0..sroa_cast = bitcast i32** %p.i to i8*, !dbg !30
call void @llvm.lifetime.start(i64 8, i8* %p.i.0..sroa_cast), !dbg !30
store i64 0, i64* getelementptr inbounds ([1000 x i64], [1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !30
store i64 0, i64* getelementptr inbounds ([8 x i64], [8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !30
%call.i = call i8* @_Znwm(i64 4) #4, !dbg !30
%_msret = load i64, i64* getelementptr inbounds ([8 x i64], [8 x i64]* @__msan_retval_tls, i64 0, i64 0), align 8, !dbg !30
%3 = bitcast i8* %call.i to i32*, !dbg !30
tail call void @llvm.dbg.value(metadata i32* %3, metadata !32, metadata !DIExpression()), !dbg !30
%4 = inttoptr i64 %1 to i64*, !dbg !30
store i64 %_msret, i64* %4, align 8, !dbg !30
store volatile i32* %3, i32** %p.i, align 8, !dbg !30
tail call void @llvm.dbg.value(metadata i32** %p.i, metadata !32, metadata !DIExpression()), !dbg !30
%p.i.0.p.0.p.0..i = load volatile i32*, i32** %p.i, align 8, !dbg !33
%_msld = load i64, i64* %4, align 8, !dbg !33
%_mscmp = icmp eq i64 %_msld, 0, !dbg !33
br i1 %_mscmp, label %6, label %5, !dbg !33, !prof !22
; <label>:5 ; preds = %entry
call void @__msan_warning_noreturn(), !dbg !33
call void asm sideeffect "", ""() #3, !dbg !33
unreachable, !dbg !33
; <label>:6 ; preds = %entry
%7 = load i32, i32* %p.i.0.p.0.p.0..i, align 4, !dbg !33, !tbaa !23
%8 = ptrtoint i32* %p.i.0.p.0.p.0..i to i64, !dbg !33
%9 = and i64 %8, -70368744177665, !dbg !33
%10 = inttoptr i64 %9 to i32*, !dbg !33
%_msld2 = load i32, i32* %10, align 4, !dbg !33
%11 = icmp ne i32 %_msld2, 0, !dbg !33
%12 = xor i32 %_msld2, -1, !dbg !33
%13 = and i32 %7, %12, !dbg !33
%14 = icmp eq i32 %13, 0, !dbg !33
%_msprop_icmp = and i1 %11, %14, !dbg !33
br i1 %_msprop_icmp, label %15, label %16, !dbg !33, !prof !27
; <label>:15 ; preds = %6
call void @__msan_warning_noreturn(), !dbg !33
call void asm sideeffect "", ""() #3, !dbg !33
unreachable, !dbg !33
; <label>:16 ; preds = %6
%tobool.i = icmp eq i32 %7, 0, !dbg !33
br i1 %tobool.i, label %_Z1fv.exit, label %if.then.i, !dbg !33
if.then.i: ; preds = %16
store i64 0, i64* getelementptr inbounds ([1000 x i64], [1000 x i64]* @__msan_param_tls, i64 0, i64 0), align 8, !dbg !34
store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !34
%puts.i = call i32 @puts(i8* getelementptr inbounds ([4 x i8], [4 x i8]* @str, i64 0, i64 0)), !dbg !34
br label %_Z1fv.exit, !dbg !34
_Z1fv.exit: ; preds = %16, %if.then.i
call void @llvm.lifetime.end(i64 8, i8* %p.i.0..sroa_cast), !dbg !35
store i32 0, i32* bitcast ([8 x i64]* @__msan_retval_tls to i32*), align 8, !dbg !36
ret i32 0, !dbg !36
}
declare void @__msan_init()
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, metadata, metadata) #2
; Function Attrs: nounwind
declare i32 @puts(i8* nocapture readonly) #3
; Function Attrs: nounwind
declare void @llvm.lifetime.start(i64, i8* nocapture) #3
; Function Attrs: nounwind
declare void @llvm.lifetime.end(i64, i8* nocapture) #3
declare void @__msan_warning_noreturn()
declare void @__msan_maybe_warning_1(i8, i32)
declare void @__msan_maybe_store_origin_1(i8, i8*, i32)
declare void @__msan_maybe_warning_2(i16, i32)
declare void @__msan_maybe_store_origin_2(i16, i8*, i32)
declare void @__msan_maybe_warning_4(i32, i32)
declare void @__msan_maybe_store_origin_4(i32, i8*, i32)
declare void @__msan_maybe_warning_8(i64, i32)
declare void @__msan_maybe_store_origin_8(i64, i8*, i32)
declare void @__msan_set_alloca_origin4(i8*, i64, i8*, i64)
declare void @__msan_poison_stack(i8*, i64)
declare i32 @__msan_chain_origin(i32)
declare i8* @__msan_memmove(i8*, i8*, i64)
declare i8* @__msan_memcpy(i8*, i8*, i64)
declare i8* @__msan_memset(i8*, i32, i64)
; Function Attrs: nounwind
declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i1) #3
attributes #0 = { sanitize_memory uwtable "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { nobuiltin "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind }
attributes #4 = { builtin }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!16, !17}
!llvm.ident = !{!18}
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, producer: "clang version 3.5.0 (trunk 207243) (llvm/trunk 207259)", isOptimized: true, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
!1 = !DIFile(filename: "foo.cpp", directory: "/usr/local/google/home/echristo/tmp")
!2 = !{}
!4 = distinct !DISubprogram(name: "f", linkageName: "_Z1fv", line: 3, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 3, file: !1, scope: !5, type: !6, variables: !8)
!5 = !DIFile(filename: "foo.cpp", directory: "/usr/local/google/home/echristo/tmp")
!6 = !DISubroutineType(types: !7)
!7 = !{null}
!8 = !{!9}
!9 = !DILocalVariable(name: "p", line: 4, scope: !4, file: !5, type: !10)
!10 = !DIDerivedType(tag: DW_TAG_volatile_type, baseType: !11)
!11 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !12)
!12 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!13 = distinct !DISubprogram(name: "main", line: 9, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: true, unit: !0, scopeLine: 9, file: !1, scope: !5, type: !14, variables: !2)
!14 = !DISubroutineType(types: !15)
!15 = !{!12}
!16 = !{i32 2, !"Dwarf Version", i32 4}
!17 = !{i32 1, !"Debug Info Version", i32 3}
!18 = !{!"clang version 3.5.0 (trunk 207243) (llvm/trunk 207259)"}
!19 = !DILocation(line: 4, scope: !4)
!20 = !DILocation(line: 5, scope: !21)
!21 = distinct !DILexicalBlock(line: 5, column: 0, file: !1, scope: !4)
!22 = !{!"branch_weights", i32 1000, i32 1}
!23 = !{!24, !24, i64 0}
!24 = !{!"int", !25, i64 0}
!25 = !{!"omnipotent char", !26, i64 0}
!26 = !{!"Simple C/C++ TBAA"}
!27 = !{!"branch_weights", i32 1, i32 1000}
!28 = !DILocation(line: 6, scope: !21)
!29 = !DILocation(line: 7, scope: !4)
!30 = !DILocation(line: 4, scope: !4, inlinedAt: !31)
!31 = !DILocation(line: 10, scope: !13)
!32 = !DILocalVariable(name: "p", line: 4, scope: !4, file: !5, type: !10)
!33 = !DILocation(line: 5, scope: !21, inlinedAt: !31)
!34 = !DILocation(line: 6, scope: !21, inlinedAt: !31)
!35 = !DILocation(line: 7, scope: !4, inlinedAt: !31)
!36 = !DILocation(line: 11, scope: !13)
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