263 lines
12 KiB
LLVM
263 lines
12 KiB
LLVM
|
; REQUIRES: arm-registered-target
|
||
|
|
; REQUIRES: aarch64-registered-target
|
||
|
|
; REQUIRES: x86-registered-target
|
||
|
|
; RUN: llc -mtriple=i686-windows < %s | FileCheck %s --check-prefixes=CHECK,I686,NOTA32
|
||
|
|
; RUN: llc -mtriple=x86_64-windows < %s | FileCheck %s --check-prefixes=CHECK,X64,NOTA32
|
||
|
|
; RUN: llc -mtriple=aarch64-windows -aarch64-min-jump-table-entries=4 < %s | FileCheck %s --check-prefixes=CHECK,A64,NOTA32
|
||
|
|
; RUN: llc -mtriple=thumbv7a-windows < %s | FileCheck %s --check-prefixes=CHECK,A32
|
||
|
|
; RUN: llc -mtriple=x86_64-windows -filetype=obj < %s | llvm-readobj - --codeview | FileCheck %s --check-prefixes=CV
|
||
|
|
|
||
|
|
; Generated by clang++ -S -c -std=c++11 -emit-llvm -g from the following C++11 source:
|
||
|
|
; extern "C" void f1();
|
||
|
|
; extern "C" void f2();
|
||
|
|
; extern "C" void f3();
|
||
|
|
; extern "C" void f4();
|
||
|
|
; extern "C" void f5();
|
||
|
|
; extern "C" void func(int i){
|
||
|
|
; switch (i) {
|
||
|
|
; case 0: f1(); break;
|
||
|
|
; case 1: f2(); break;
|
||
|
|
; case 2: f3(); break;
|
||
|
|
; case 3: f4(); break;
|
||
|
|
; }
|
||
|
|
; switch (i) {
|
||
|
|
; case 1: f2(); break;
|
||
|
|
; case 2: f3(); break;
|
||
|
|
; case 3: f4(); break;
|
||
|
|
; case 4: f5(); break;
|
||
|
|
; case 5: f1(); break;
|
||
|
|
; }
|
||
|
|
; }
|
||
|
|
|
||
|
|
; i686 entries are absolute addresses (Base = 0, SwitchType = Pointer).
|
||
|
|
; x86_64 entries are fixed-size and relative to the jump table (Base = Table,
|
||
|
|
; SwitchType = Int32).
|
||
|
|
; aarch64 entries are variable-sized and relative to the first entry's BB if
|
||
|
|
; compressed (Base = Branch+0x4, SwitchType = UInt8ShiftLeft/UInt16ShiftLeft)
|
||
|
|
; otherwise relative to the ADR instruction (Base = Branch-0xc, SwitchType =
|
||
|
|
; Int32).
|
||
|
|
; thumbv7a entries are either absolute addresses (Base = 0, SwitchType =
|
||
|
|
; Pointer) OR variable-sized and relative to *after* the branch instruction
|
||
|
|
; (Base = Branch+0x4, SwitchType = UInt8ShiftLeft/UInt16ShiftLeft/UInt32) but
|
||
|
|
; there appears to be a bug where the offsets are always 0.
|
||
|
|
|
||
|
|
; Verify branch labels match what's in the CodeView
|
||
|
|
; X64: .Ltmp1:
|
||
|
|
; X64-NEXT: jmpq *%{{.*}}
|
||
|
|
; X64: .Ltmp4:
|
||
|
|
; X64-NEXT: jmpq *%{{.*}}
|
||
|
|
; A32: .LCPI0_0:
|
||
|
|
; A32-NEXT add pc, r{{.*}}
|
||
|
|
; NOTE: thumbv7a places the jump tables just after the branch, so verify the other branch below
|
||
|
|
; A64: .Ltmp1:
|
||
|
|
; A64-NEXT: br x{{.*}}
|
||
|
|
; A64: .Ltmp4:
|
||
|
|
; A64-NEXT: br x{{.*}}
|
||
|
|
|
||
|
|
; Verify jump table have the same entry size, base offset and shift as what's in the CodeView
|
||
|
|
; CHECK: {{\.?}}LJTI0_0:
|
||
|
|
; I686-NEXT: .long LBB0_[[#]]
|
||
|
|
; X64-NEXT: .long .LBB0_[[#]]-.LJTI0_0
|
||
|
|
; A32-NEXT: .byte (($MBB0_[[#]])-(.LCPI0_0+4))/2
|
||
|
|
; A64-NEXT: .byte (.LBB0_[[FIRSTBLOCK:[0-9]+]]-.LBB0_[[FIRSTBLOCK]])>>2
|
||
|
|
; NOTE: thumbv7a places the jump tables just after the branch, so check for the other branch now
|
||
|
|
; A32: .LCPI0_1:
|
||
|
|
; A32-NEXT add pc, r{{.*}}
|
||
|
|
; CHECK: {{\.?}}LJTI0_1:
|
||
|
|
; I686-NEXT: .long LBB0_[[#]]
|
||
|
|
; X64-NEXT: .long .LBB0_[[#]]-.LJTI0_1
|
||
|
|
; A32-NEXT: .byte (($MBB0_[[#]])-(.LCPI0_1+4))/2
|
||
|
|
; A64-NEXT: .byte (.LBB0_[[SECONDBLOCK:[0-9]+]]-.LBB0_[[SECONDBLOCK]])>>2
|
||
|
|
|
||
|
|
; Verify CodeView
|
||
|
|
; CHECK: [[INT16:\.short|\.hword]] 4441 [[COMMENT:#|//|@]] Record kind: S_ARMSWITCHTABLE
|
||
|
|
; I686-NEXT: .long 0 [[COMMENT]] Base offset
|
||
|
|
; I686-NEXT: .short 0 [[COMMENT]] Base section index
|
||
|
|
; X64-NEXT: .secrel32 .LJTI0_0 [[COMMENT]] Base offset
|
||
|
|
; X64-NEXT: .secidx .LJTI0_0 [[COMMENT]] Base section index
|
||
|
|
; A32-NEXT: .secrel32 .LCPI0_0+4 [[COMMENT]] Base offset
|
||
|
|
; A32-NEXT: .secidx .LCPI0_0 [[COMMENT]] Base section index
|
||
|
|
; A64-NEXT: .secrel32 .LBB0_[[FIRSTBLOCK]] [[COMMENT]] Base offset
|
||
|
|
; A64-NEXT: .secidx .LBB0_[[FIRSTBLOCK]] [[COMMENT]] Base section index
|
||
|
|
; I686-NEXT: .short 6 [[COMMENT]] Switch type
|
||
|
|
; X64-NEXT: .short 4 [[COMMENT]] Switch type
|
||
|
|
; A32-NEXT: .short 7 [[COMMENT]] Switch type
|
||
|
|
; A64-NEXT: .hword 7 [[COMMENT]] Switch type
|
||
|
|
; NOTA32-NEXT: .secrel32 {{\.?}}Ltmp1 [[COMMENT]] Branch offset
|
||
|
|
; A32-NEXT: .secrel32 .LCPI0_0 [[COMMENT]] Branch offset
|
||
|
|
; CHECK-NEXT: .secrel32 {{\.?}}LJTI0_0 [[COMMENT]] Table offset
|
||
|
|
; NOTA32-NEXT: .secidx {{\.?}}Ltmp1 [[COMMENT]] Branch section index
|
||
|
|
; A32-NEXT: .secidx .LCPI0_0 [[COMMENT]] Branch section index
|
||
|
|
; CHECK-NEXT: .secidx {{\.?}}LJTI0_0 [[COMMENT]] Table section index
|
||
|
|
; CHECK-NEXT: [[INT32:\.long|\.word]] 4 [[COMMENT]] Entries count
|
||
|
|
; CHECK: [[INT16]] 4441 [[COMMENT]] Record kind: S_ARMSWITCHTABLE
|
||
|
|
; I686-NEXT: .long 0 [[COMMENT]] Base offset
|
||
|
|
; I686-NEXT: .short 0 [[COMMENT]] Base section index
|
||
|
|
; X64-NEXT: .secrel32 .LJTI0_1 [[COMMENT]] Base offset
|
||
|
|
; X64-NEXT: .secidx .LJTI0_1 [[COMMENT]] Base section index
|
||
|
|
; A32-NEXT: .secrel32 .LCPI0_1+4 [[COMMENT]] Base offset
|
||
|
|
; A32-NEXT: .secidx .LCPI0_1 [[COMMENT]] Base section index
|
||
|
|
; A64-NEXT: .secrel32 .LBB0_[[SECONDBLOCK]] [[COMMENT]] Base offset
|
||
|
|
; A64-NEXT: .secidx .LBB0_[[SECONDBLOCK]] [[COMMENT]] Base section index
|
||
|
|
; I686-NEXT: .short 6 [[COMMENT]] Switch type
|
||
|
|
; X64-NEXT: .short 4 [[COMMENT]] Switch type
|
||
|
|
; A32-NEXT: .short 7 [[COMMENT]] Switch type
|
||
|
|
; A64-NEXT: .hword 7 [[COMMENT]] Switch type
|
||
|
|
; NOTA32-NEXT: .secrel32 {{\.?}}Ltmp4 [[COMMENT]] Branch offset
|
||
|
|
; A32-NEXT: .secrel32 .LCPI0_1 [[COMMENT]] Branch offset
|
||
|
|
; CHECK-NEXT: .secrel32 {{\.?}}LJTI0_1 [[COMMENT]] Table offset
|
||
|
|
; NOTA32-NEXT: .secidx {{\.?}}Ltmp4 [[COMMENT]] Branch section index
|
||
|
|
; A32-NEXT: .secidx .LCPI0_1 [[COMMENT]] Branch section index
|
||
|
|
; CHECK-NEXT: .secidx {{\.?}}LJTI0_1 [[COMMENT]] Table section index
|
||
|
|
; CHECK-NEXT: [[INT32]] 5 [[COMMENT]] Entries count
|
||
|
|
; CHECK-NOT: [[INT16]] 4441 [[COMMENT]] Record kind: S_ARMSWITCHTABLE
|
||
|
|
|
||
|
|
; Verify CodeView as dumped by llvm-readobj
|
||
|
|
; CV: Subsection [
|
||
|
|
; CV: SubSectionType: Symbols (0xF1)
|
||
|
|
; CV: GlobalProcIdSym {
|
||
|
|
; CV: DisplayName: func
|
||
|
|
; CV-NOT: GlobalProcIdSym
|
||
|
|
; CV: JumpTableSym {
|
||
|
|
; CV-NEXT: Kind: S_ARMSWITCHTABLE (0x1159)
|
||
|
|
; CV-NEXT: BaseOffset: 0x0
|
||
|
|
; CV-NEXT: BaseSegment: 0
|
||
|
|
; CV-NEXT: SwitchType: Int32 (0x4)
|
||
|
|
; CV-NEXT: BranchOffset: 0x23
|
||
|
|
; CV-NEXT: TableOffset: 0x0
|
||
|
|
; CV-NEXT: BranchSegment: 0
|
||
|
|
; CV-NEXT: TableSegment: 0
|
||
|
|
; CV-NEXT: EntriesCount: 4
|
||
|
|
; CV-NEXT: }
|
||
|
|
; CV-NEXT: JumpTableSym {
|
||
|
|
; CV-NEXT: Kind: S_ARMSWITCHTABLE (0x1159)
|
||
|
|
; CV-NEXT: BaseOffset: 0x10
|
||
|
|
; CV-NEXT: BaseSegment: 0
|
||
|
|
; CV-NEXT: SwitchType: Int32 (0x4)
|
||
|
|
; CV-NEXT: BranchOffset: 0x5A
|
||
|
|
; CV-NEXT: TableOffset: 0x10
|
||
|
|
; CV-NEXT: BranchSegment: 0
|
||
|
|
; CV-NEXT: TableSegment: 0
|
||
|
|
; CV-NEXT: EntriesCount: 5
|
||
|
|
; CV-NEXT: }
|
||
|
|
; CV-NOT: JumpTableSym {
|
||
|
|
|
||
|
|
source_filename = ".\\jump-table.cpp"
|
||
|
|
target datalayout = "e-m:w-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
|
||
|
|
target triple = "x86_64-pc-windows-msvc19.35.32216"
|
||
|
|
|
||
|
|
; Function Attrs: mustprogress noinline optnone uwtable
|
||
|
|
define dso_local void @func(i32 noundef %0) #0 !dbg !8 {
|
||
|
|
%2 = alloca i32, align 4
|
||
|
|
store i32 %0, ptr %2, align 4
|
||
|
|
call void @llvm.dbg.declare(metadata ptr %2, metadata !14, metadata !DIExpression()), !dbg !15
|
||
|
|
%3 = load i32, ptr %2, align 4, !dbg !16
|
||
|
|
switch i32 %3, label %8 [
|
||
|
|
i32 0, label %4
|
||
|
|
i32 1, label %5
|
||
|
|
i32 2, label %6
|
||
|
|
i32 3, label %7
|
||
|
|
], !dbg !16
|
||
|
|
|
||
|
|
4: ; preds = %1
|
||
|
|
call void @f1(), !dbg !17
|
||
|
|
br label %8, !dbg !17
|
||
|
|
|
||
|
|
5: ; preds = %1
|
||
|
|
call void @f2(), !dbg !19
|
||
|
|
br label %8, !dbg !19
|
||
|
|
|
||
|
|
6: ; preds = %1
|
||
|
|
call void @f3(), !dbg !20
|
||
|
|
br label %8, !dbg !20
|
||
|
|
|
||
|
|
7: ; preds = %1
|
||
|
|
call void @f4(), !dbg !21
|
||
|
|
br label %8, !dbg !21
|
||
|
|
|
||
|
|
8: ; preds = %1, %7, %6, %5, %4
|
||
|
|
%9 = load i32, ptr %2, align 4, !dbg !22
|
||
|
|
switch i32 %9, label %15 [
|
||
|
|
i32 1, label %10
|
||
|
|
i32 2, label %11
|
||
|
|
i32 3, label %12
|
||
|
|
i32 4, label %13
|
||
|
|
i32 5, label %14
|
||
|
|
], !dbg !22
|
||
|
|
|
||
|
|
10: ; preds = %8
|
||
|
|
call void @f2(), !dbg !23
|
||
|
|
br label %15, !dbg !23
|
||
|
|
|
||
|
|
11: ; preds = %8
|
||
|
|
call void @f3(), !dbg !25
|
||
|
|
br label %15, !dbg !25
|
||
|
|
|
||
|
|
12: ; preds = %8
|
||
|
|
call void @f4(), !dbg !26
|
||
|
|
br label %15, !dbg !26
|
||
|
|
|
||
|
|
13: ; preds = %8
|
||
|
|
call void @f5(), !dbg !27
|
||
|
|
br label %15, !dbg !27
|
||
|
|
|
||
|
|
14: ; preds = %8
|
||
|
|
call void @f1(), !dbg !28
|
||
|
|
br label %15, !dbg !28
|
||
|
|
|
||
|
|
15: ; preds = %8, %14, %13, %12, %11, %10
|
||
|
|
ret void, !dbg !29
|
||
|
|
}
|
||
|
|
|
||
|
|
; Function Attrs: nocallback nofree nosync nounwind readnone speculatable willreturn
|
||
|
|
declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
|
||
|
|
|
||
|
|
declare dso_local void @f1() #2
|
||
|
|
|
||
|
|
declare dso_local void @f2() #2
|
||
|
|
|
||
|
|
declare dso_local void @f3() #2
|
||
|
|
|
||
|
|
declare dso_local void @f4() #2
|
||
|
|
|
||
|
|
declare dso_local void @f5() #2
|
||
|
|
|
||
|
|
attributes #0 = { mustprogress noinline optnone uwtable "frame-pointer"="none" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
|
||
|
|
attributes #1 = { nocallback nofree nosync nounwind readnone speculatable willreturn }
|
||
|
|
attributes #2 = { "frame-pointer"="none" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
|
||
|
|
|
||
|
|
!llvm.dbg.cu = !{!0}
|
||
|
|
!llvm.module.flags = !{!2, !3, !4, !5, !6}
|
||
|
|
!llvm.ident = !{!7}
|
||
|
|
|
||
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus_11, file: !1, producer: "clang version 15.0.1", isOptimized: false, runtimeVersion: 0, emissionKind: FullDebug, splitDebugInlining: false, nameTableKind: None)
|
||
|
|
!1 = !DIFile(filename: "jump-table.cpp", directory: "C:\\llvm", checksumkind: CSK_MD5, checksum: "35610c7104c8080f83e2bf6a02dabfc9")
|
||
|
|
!2 = !{i32 2, !"CodeView", i32 1}
|
||
|
|
!3 = !{i32 2, !"Debug Info Version", i32 3}
|
||
|
|
!4 = !{i32 1, !"wchar_size", i32 2}
|
||
|
|
!5 = !{i32 7, !"PIC Level", i32 2}
|
||
|
|
!6 = !{i32 7, !"uwtable", i32 2}
|
||
|
|
!7 = !{!"clang version 15.0.1"}
|
||
|
|
!8 = distinct !DISubprogram(name: "func", scope: !9, file: !9, line: 6, type: !10, scopeLine: 6, flags: DIFlagPrototyped, spFlags: DISPFlagDefinition, unit: !0, retainedNodes: !13)
|
||
|
|
!9 = !DIFile(filename: ".\\jump-table.cpp", directory: "C:\\llvm", checksumkind: CSK_MD5, checksum: "35610c7104c8080f83e2bf6a02dabfc9")
|
||
|
|
!10 = !DISubroutineType(types: !11)
|
||
|
|
!11 = !{null, !12}
|
||
|
|
!12 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
||
|
|
!13 = !{}
|
||
|
|
!14 = !DILocalVariable(name: "i", arg: 1, scope: !8, file: !9, line: 6, type: !12)
|
||
|
|
!15 = !DILocation(line: 6, scope: !8)
|
||
|
|
!16 = !DILocation(line: 7, scope: !8)
|
||
|
|
!17 = !DILocation(line: 8, scope: !18)
|
||
|
|
!18 = distinct !DILexicalBlock(scope: !8, file: !9, line: 7)
|
||
|
|
!19 = !DILocation(line: 9, scope: !18)
|
||
|
|
!20 = !DILocation(line: 10, scope: !18)
|
||
|
|
!21 = !DILocation(line: 11, scope: !18)
|
||
|
|
!22 = !DILocation(line: 13, scope: !8)
|
||
|
|
!23 = !DILocation(line: 14, scope: !24)
|
||
|
|
!24 = distinct !DILexicalBlock(scope: !8, file: !9, line: 13)
|
||
|
|
!25 = !DILocation(line: 15, scope: !24)
|
||
|
|
!26 = !DILocation(line: 16, scope: !24)
|
||
|
|
!27 = !DILocation(line: 17, scope: !24)
|
||
|
|
!28 = !DILocation(line: 18, scope: !24)
|
||
|
|
!29 = !DILocation(line: 20, scope: !8)
|