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llvm-project/llvm/test/CodeGen/Hexagon/cfi-late.ll

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[Hexagon] Delay emission of CFI instructions Emit the CFI instructions after all code transformation have been done. This will avoid any interference between CFI instructions and packetization. llvm-svn: 250714
2015-10-20 01:46:01 +08:00
; RUN: llc -march=hexagon -enable-misched=false < %s | FileCheck %s
; This testcase causes the scheduler to crash for some reason. Disable
; it for now.
target datalayout = "e-m:e-p:32:32-i64:64-a:0-v32:32-n16:32"
target triple = "hexagon-unknown--elf"
; Check that allocframe was packetized with the two adds.
; CHECK: foo:
; CHECK: {
; CHECK-DAG: allocframe
; CHECK-DAG: add
; CHECK-DAG: add
; CHECK: }
; CHECK: dealloc_return
; CHECK: }
; Function Attrs: nounwind
DI: Reverse direction of subprogram -> function edge. Previously, subprograms contained a metadata reference to the function they described. Because most clients need to get or set a subprogram for a given function rather than the other way around, this created unneeded inefficiency. For example, many passes needed to call the function llvm::makeSubprogramMap() to build a mapping from functions to subprograms, and the IR linker needed to fix up function references in a way that caused quadratic complexity in the IR linking phase of LTO. This change reverses the direction of the edge by storing the subprogram as function-level metadata and removing DISubprogram's function field. Since this is an IR change, a bitcode upgrade has been provided. Fixes PR23367. An upgrade script for textual IR for out-of-tree clients is attached to the PR. Differential Revision: http://reviews.llvm.org/D14265 llvm-svn: 252219
2015-11-06 06:03:56 +08:00
define i32 @foo(i32 %x, i32 %y) #0 !dbg !4 {
[Hexagon] Delay emission of CFI instructions Emit the CFI instructions after all code transformation have been done. This will avoid any interference between CFI instructions and packetization. llvm-svn: 250714
2015-10-20 01:46:01 +08:00
entry:
tail call void @llvm.dbg.value(metadata i32 %x, i64 0, metadata !9, metadata !14), !dbg !15
tail call void @llvm.dbg.value(metadata i32 %y, i64 0, metadata !10, metadata !14), !dbg !16
%add = add nsw i32 %x, 1, !dbg !17
%add1 = add nsw i32 %y, 1, !dbg !18
%call = tail call i32 @bar(i32 %add, i32 %add1) #3, !dbg !19
%add2 = add nsw i32 %call, 1, !dbg !20
ret i32 %add2, !dbg !21
}
declare i32 @bar(i32, i32) #1
; Function Attrs: nounwind readnone
declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #2
attributes #0 = { nounwind "disable-tail-calls"="false" "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" "target-cpu"="hexagonv4" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "disable-tail-calls"="false" "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" "target-cpu"="hexagonv4" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #2 = { nounwind readnone }
attributes #3 = { nounwind }
!llvm.dbg.cu = !{!0}
!llvm.module.flags = !{!11, !12}
!llvm.ident = !{!13}
[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446
2016-04-15 23:57:41 +08:00
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 3.8.0 (http://llvm.org/git/clang.git 15506a21305e212c406f980ed9b6b1bac785df56)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
[Hexagon] Delay emission of CFI instructions Emit the CFI instructions after all code transformation have been done. This will avoid any interference between CFI instructions and packetization. llvm-svn: 250714
2015-10-20 01:46:01 +08:00
!1 = !DIFile(filename: "cfi-late.c", directory: "/test")
!2 = !{}
[PR27284] Reverse the ownership between DICompileUnit and DISubprogram. Currently each Function points to a DISubprogram and DISubprogram has a scope field. For member functions the scope is a DICompositeType. DIScopes point to the DICompileUnit to facilitate type uniquing. Distinct DISubprograms (with isDefinition: true) are not part of the type hierarchy and cannot be uniqued. This change removes the subprograms list from DICompileUnit and instead adds a pointer to the owning compile unit to distinct DISubprograms. This would make it easy for ThinLTO to strip unneeded DISubprograms and their transitively referenced debug info. Motivation ---------- Materializing DISubprograms is currently the most expensive operation when doing a ThinLTO build of clang. We want the DISubprogram to be stored in a separate Bitcode block (or the same block as the function body) so we can avoid having to expensively deserialize all DISubprograms together with the global metadata. If a function has been inlined into another subprogram we need to store a reference the block containing the inlined subprogram. Attached to https://llvm.org/bugs/show_bug.cgi?id=27284 is a python script that updates LLVM IR testcases to the new format. http://reviews.llvm.org/D19034 <rdar://problem/25256815> llvm-svn: 266446
2016-04-15 23:57:41 +08:00
!4 = distinct !DISubprogram(name: "foo", scope: !1, file: !1, line: 3, type: !5, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, variables: !8)
[Hexagon] Delay emission of CFI instructions Emit the CFI instructions after all code transformation have been done. This will avoid any interference between CFI instructions and packetization. llvm-svn: 250714
2015-10-20 01:46:01 +08:00
!5 = !DISubroutineType(types: !6)
!6 = !{!7, !7, !7}
!7 = !DIBasicType(name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
!8 = !{!9, !10}
!9 = !DILocalVariable(name: "x", arg: 1, scope: !4, file: !1, line: 3, type: !7)
!10 = !DILocalVariable(name: "y", arg: 2, scope: !4, file: !1, line: 3, type: !7)
!11 = !{i32 2, !"Dwarf Version", i32 4}
!12 = !{i32 2, !"Debug Info Version", i32 3}
!13 = !{!"clang version 3.8.0 (http://llvm.org/git/clang.git 15506a21305e212c406f980ed9b6b1bac785df56)"}
!14 = !DIExpression()
!15 = !DILocation(line: 3, column: 13, scope: !4)
!16 = !DILocation(line: 3, column: 20, scope: !4)
!17 = !DILocation(line: 4, column: 15, scope: !4)
!18 = !DILocation(line: 4, column: 20, scope: !4)
!19 = !DILocation(line: 4, column: 10, scope: !4)
!20 = !DILocation(line: 4, column: 24, scope: !4)
!21 = !DILocation(line: 4, column: 3, scope: !4)