1d0ccebcd7
Assuming that the stack grows downwards, it is fine if the stack pointer is exactly at the stacklet boundary. We should use less-or-equal condition when deciding whether to skip new memory allocation. Differential Revision: https://reviews.llvm.org/D149315
80 lines
3.6 KiB
LLVM
80 lines
3.6 KiB
LLVM
; RUN: llc < %s -mtriple=arm-linux-unknown-gnueabi -mattr=+v4t -verify-machineinstrs -filetype=asm | FileCheck %s -check-prefix=ARM-linux
|
|
; RUN: llc < %s -mtriple=arm-linux-unknown-gnueabi -mattr=+v4t -filetype=obj
|
|
|
|
!llvm.dbg.cu = !{!0}
|
|
!llvm.module.flags = !{!9, !10}
|
|
!llvm.ident = !{!11}
|
|
|
|
define void @test_basic() #0 !dbg !4 {
|
|
%mem = alloca i32, i32 10
|
|
call void @dummy_use (ptr %mem, i32 10)
|
|
ret void
|
|
|
|
; ARM-linux: test_basic:
|
|
|
|
; ARM-linux: push {r4, r5}
|
|
; ARM-linux: .cfi_def_cfa_offset 8
|
|
; ARM-linux: .cfi_offset r5, -4
|
|
; ARM-linux: .cfi_offset r4, -8
|
|
; ARM-linux-NEXT: mrc p15, #0, r4, c13, c0, #3
|
|
; ARM-linux-NEXT: mov r5, sp
|
|
; ARM-linux-NEXT: ldr r4, [r4, #4]
|
|
; ARM-linux-NEXT: cmp r4, r5
|
|
; ARM-linux-NEXT: bls .LBB0_2
|
|
|
|
; ARM-linux: mov r4, #48
|
|
; ARM-linux-NEXT: mov r5, #0
|
|
; ARM-linux-NEXT: stmdb sp!, {lr}
|
|
; ARM-linux: .cfi_def_cfa_offset 12
|
|
; ARM-linux: .cfi_offset lr, -12
|
|
; ARM-linux-NEXT: bl __morestack
|
|
; ARM-linux-NEXT: ldm sp!, {lr}
|
|
; ARM-linux-NEXT: pop {r4, r5}
|
|
; ARM-linux: .cfi_def_cfa_offset 0
|
|
; ARM-linux-NEXT: bx lr
|
|
|
|
; ARM-linux: pop {r4, r5}
|
|
; ARM-linux: .cfi_def_cfa_offset 0
|
|
; ARM-linux: .cfi_same_value r4
|
|
; ARM-linux: .cfi_same_value r5
|
|
}
|
|
|
|
!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.5 ", isOptimized: false, emissionKind: FullDebug, file: !1, enums: !2, retainedTypes: !2, globals: !2, imports: !2)
|
|
!1 = !DIFile(filename: "var.c", directory: "/tmp")
|
|
!2 = !{}
|
|
!4 = distinct !DISubprogram(name: "test_basic", line: 5, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 5, file: !1, scope: !5, type: !6, retainedNodes: !2)
|
|
!5 = !DIFile(filename: "var.c", directory: "/tmp")
|
|
!6 = !DISubroutineType(types: !7)
|
|
!7 = !{!8, !8}
|
|
!8 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
|
|
!9 = !{i32 2, !"Dwarf Version", i32 4}
|
|
!10 = !{i32 1, !"Debug Info Version", i32 3}
|
|
!11 = !{!"clang version 3.5 "}
|
|
!12 = !DILocalVariable(name: "count", line: 5, arg: 1, scope: !4, file: !5, type: !8)
|
|
!13 = !DILocation(line: 5, scope: !4)
|
|
!14 = !DILocalVariable(name: "vl", line: 6, scope: !4, file: !5, type: !15)
|
|
!15 = !DIDerivedType(tag: DW_TAG_typedef, name: "va_list", line: 30, file: !16, baseType: !17)
|
|
!16 = !DIFile(filename: "/linux-x86_64-high/gcc_4.7.2/dbg/llvm/bin/../lib/clang/3.5/include/stdarg.h", directory: "/tmp")
|
|
!17 = !DIDerivedType(tag: DW_TAG_typedef, name: "__builtin_va_list", line: 6, file: !1, baseType: !18)
|
|
!18 = !DICompositeType(tag: DW_TAG_structure_type, name: "__va_list", line: 6, size: 32, align: 32, file: !1, elements: !19)
|
|
!19 = !{!20}
|
|
!20 = !DIDerivedType(tag: DW_TAG_member, name: "__ap", line: 6, size: 32, align: 32, file: !1, scope: !18, baseType: !21)
|
|
!21 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 32, align: 32, baseType: null)
|
|
!22 = !DILocation(line: 6, scope: !4)
|
|
!23 = !DILocation(line: 7, scope: !4)
|
|
!24 = !DILocalVariable(name: "test_basic", line: 8, scope: !4, file: !5, type: !8)
|
|
!25 = !DILocation(line: 8, scope: !4)
|
|
!26 = !DILocalVariable(name: "i", line: 9, scope: !27, file: !5, type: !8)
|
|
!27 = distinct !DILexicalBlock(line: 9, column: 0, file: !1, scope: !4)
|
|
!28 = !DILocation(line: 9, scope: !27)
|
|
!29 = !DILocation(line: 10, scope: !30)
|
|
!30 = distinct !DILexicalBlock(line: 9, column: 0, file: !1, scope: !27)
|
|
!31 = !DILocation(line: 11, scope: !30)
|
|
!32 = !DILocation(line: 12, scope: !4)
|
|
!33 = !DILocation(line: 13, scope: !4)
|
|
|
|
; Just to prevent the alloca from being optimized away
|
|
declare void @dummy_use(ptr, i32)
|
|
|
|
attributes #0 = { "split-stack" }
|