148 lines
5.7 KiB
Plaintext
148 lines
5.7 KiB
Plaintext
|
# RUN: llc -start-after=machine-scheduler %s -o - | FileCheck %s
|
||
|
|
|
||
|
|
# C source:
|
||
|
|
# void escape(int *);
|
||
|
|
# extern int global;
|
||
|
|
# void f(int x) {
|
||
|
|
# escape(&x);
|
||
|
|
# x = 1;
|
||
|
|
# global = x;
|
||
|
|
# x = 2;
|
||
|
|
# escape(&x);
|
||
|
|
# }
|
||
|
|
|
||
|
|
# CHECK-LABEL: f: # @f
|
||
|
|
# CHECK: movl %ecx, [[OFF_X:[0-9]+]](%rsp)
|
||
|
|
# CHECK: #DEBUG_VALUE: f:x <- [DW_OP_plus_uconst [[OFF_X]]] [$rsp+0]
|
||
|
|
# CHECK: leaq [[OFF_X]](%rsp), %rsi
|
||
|
|
# CHECK: callq escape
|
||
|
|
# CHECK: #DEBUG_VALUE: f:x <- 1
|
||
|
|
# CHECK: movl $1, global(%rip)
|
||
|
|
# CHECK: #DEBUG_VALUE: f:x <- [DW_OP_plus_uconst [[OFF_X]]] [$rsp+0]
|
||
|
|
# CHECK: movl $2, [[OFF_X]](%rsp)
|
||
|
|
# CHECK: callq escape
|
||
|
|
# CHECK: retq
|
||
|
|
|
||
|
|
|
||
|
|
--- |
|
||
|
|
; ModuleID = '<stdin>'
|
||
|
|
source_filename = "dse.c"
|
||
|
|
target datalayout = "e-m:w-i64:64-f80:128-n8:16:32:64-S128"
|
||
|
|
target triple = "x86_64-pc-windows-msvc19.0.24215"
|
||
|
|
|
||
|
|
@global = external global i32, align 4
|
||
|
|
|
||
|
|
; Function Attrs: nounwind readnone speculatable
|
||
|
|
declare void @llvm.dbg.value(metadata, metadata, metadata) #0
|
||
|
|
|
||
|
|
declare void @escape(i32*)
|
||
|
|
|
||
|
|
; Function Attrs: nounwind uwtable
|
||
|
|
define void @f(i32 %x) #1 !dbg !8 {
|
||
|
|
entry:
|
||
|
|
%x.addr = alloca i32, align 4
|
||
|
|
store i32 %x, i32* %x.addr, align 4
|
||
|
|
call void @llvm.dbg.value(metadata i32* %x.addr, metadata !13, metadata !DIExpression()), !dbg !14
|
||
|
|
call void @escape(i32* %x.addr), !dbg !15
|
||
|
|
call void @llvm.dbg.value(metadata i32 1, metadata !13, metadata !DIExpression()), !dbg !16
|
||
|
|
store i32 1, i32* @global, align 4, !dbg !17
|
||
|
|
call void @llvm.dbg.value(metadata i32* %x.addr, metadata !13, metadata !DIExpression()), !dbg !18
|
||
|
|
store i32 2, i32* %x.addr, align 4, !dbg !18
|
||
|
|
call void @escape(i32* %x.addr), !dbg !19
|
||
|
|
ret void, !dbg !20
|
||
|
|
}
|
||
|
|
|
||
|
|
; Function Attrs: nounwind
|
||
|
|
declare void @llvm.stackprotector(i8*, i8**) #2
|
||
|
|
|
||
|
|
attributes #0 = { nounwind readnone speculatable }
|
||
|
|
attributes #1 = { nounwind uwtable }
|
||
|
|
attributes #2 = { nounwind }
|
||
|
|
|
||
|
|
!llvm.dbg.cu = !{!0}
|
||
|
|
!llvm.module.flags = !{!3, !4, !5, !6}
|
||
|
|
!llvm.ident = !{!7}
|
||
|
|
|
||
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "clang version 6.0.0 ", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !2)
|
||
|
|
!1 = !DIFile(filename: "dse.c", directory: "C:\5Csrc\5Cllvm-project\5Cbuild")
|
||
|
|
!2 = !{}
|
||
|
|
!3 = !{i32 2, !"Dwarf Version", i32 4}
|
||
|
|
!4 = !{i32 2, !"Debug Info Version", i32 3}
|
||
|
|
!5 = !{i32 1, !"wchar_size", i32 2}
|
||
|
|
!6 = !{i32 7, !"PIC Level", i32 2}
|
||
|
|
!7 = !{!"clang version 6.0.0 "}
|
||
|
|
!8 = distinct !DISubprogram(name: "f", scope: !1, file: !1, line: 3, type: !9, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !12)
|
||
|
|
!9 = !DISubroutineType(types: !10)
|
||
|
|
!10 = !{null, !11}
|
||
|
|
!11 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
|
||
|
|
!12 = !{!13}
|
||
|
|
!13 = !DILocalVariable(name: "x", arg: 1, scope: !8, file: !1, line: 3, type: !11)
|
||
|
|
!14 = !DILocation(line: 3, column: 12, scope: !8)
|
||
|
|
!15 = !DILocation(line: 4, column: 3, scope: !8)
|
||
|
|
!16 = !DILocation(line: 5, column: 5, scope: !8)
|
||
|
|
!17 = !DILocation(line: 6, column: 10, scope: !8)
|
||
|
|
!18 = !DILocation(line: 7, column: 5, scope: !8)
|
||
|
|
!19 = !DILocation(line: 8, column: 3, scope: !8)
|
||
|
|
!20 = !DILocation(line: 9, column: 1, scope: !8)
|
||
|
|
|
||
|
|
...
|
||
|
|
---
|
||
|
|
name: f
|
||
|
|
alignment: 16
|
||
|
|
exposesReturnsTwice: false
|
||
|
|
legalized: false
|
||
|
|
regBankSelected: false
|
||
|
|
selected: false
|
||
|
|
tracksRegLiveness: true
|
||
|
|
registers:
|
||
|
|
- { id: 0, class: gr32, preferred-register: '' }
|
||
|
|
- { id: 1, class: gr64, preferred-register: '' }
|
||
|
|
liveins:
|
||
|
|
- { reg: '$ecx', virtual-reg: '%0' }
|
||
|
|
frameInfo:
|
||
|
|
isFrameAddressTaken: false
|
||
|
|
isReturnAddressTaken: false
|
||
|
|
hasStackMap: false
|
||
|
|
hasPatchPoint: false
|
||
|
|
stackSize: 0
|
||
|
|
offsetAdjustment: 0
|
||
|
|
maxAlignment: 8
|
||
|
|
adjustsStack: false
|
||
|
|
hasCalls: true
|
||
|
|
stackProtector: ''
|
||
|
|
maxCallFrameSize: 4294967295
|
||
|
|
hasOpaqueSPAdjustment: false
|
||
|
|
hasVAStart: false
|
||
|
|
hasMustTailInVarArgFunc: false
|
||
|
|
savePoint: ''
|
||
|
|
restorePoint: ''
|
||
|
|
fixedStack:
|
||
|
|
stack:
|
||
|
|
- { id: 0, name: x.addr, type: default, offset: 0, size: 4, alignment: 4,
|
||
|
|
stack-id: default, callee-saved-register: '', debug-info-variable: '',
|
||
|
|
debug-info-expression: '', debug-info-location: '' }
|
||
|
|
constants:
|
||
|
|
body: |
|
||
|
|
bb.0.entry:
|
||
|
|
liveins: $ecx
|
||
|
|
|
||
|
|
%0 = COPY $ecx
|
||
|
|
MOV32mr %stack.0.x.addr, 1, _, 0, _, %0 :: (store 4 into %ir.x.addr)
|
||
|
|
DBG_VALUE %stack.0.x.addr, 0, !13, !DIExpression(), debug-location !14
|
||
|
|
ADJCALLSTACKDOWN64 32, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !15
|
||
|
|
%1 = LEA64r %stack.0.x.addr, 1, _, 0, _
|
||
|
|
$rcx = COPY %1, debug-location !15
|
||
|
|
CALL64pcrel32 @escape, csr_win64, implicit $rsp, implicit $ssp, implicit $rcx, implicit-def $rsp, implicit-def $ssp, debug-location !15
|
||
|
|
ADJCALLSTACKUP64 32, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !15
|
||
|
|
DBG_VALUE 1, _, !13, !DIExpression(), debug-location !16
|
||
|
|
MOV32mi $rip, 1, _, @global, _, 1, debug-location !17 :: (store 4 into @global)
|
||
|
|
DBG_VALUE %stack.0.x.addr, 0, !13, !DIExpression(), debug-location !18
|
||
|
|
MOV32mi %stack.0.x.addr, 1, _, 0, _, 2, debug-location !18 :: (store 4 into %ir.x.addr)
|
||
|
|
ADJCALLSTACKDOWN64 32, 0, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !19
|
||
|
|
$rcx = COPY %1, debug-location !19
|
||
|
|
CALL64pcrel32 @escape, csr_win64, implicit $rsp, implicit $ssp, implicit $rcx, implicit-def $rsp, implicit-def $ssp, debug-location !19
|
||
|
|
ADJCALLSTACKUP64 32, 0, implicit-def dead $rsp, implicit-def dead $eflags, implicit-def dead $ssp, implicit $rsp, implicit $ssp, debug-location !19
|
||
|
|
RET 0, debug-location !20
|
||
|
|
|
||
|
|
...
|