f541a5048a
By reordering the objects on the stack frame after looking at the users, a better utilization of displacement operands will result. This means less needed Load Address instructions for the accessing of these objects. This is important for very large functions where otherwise small changes could cause a lot more/less accesses go out of range. Note: this is not yet enabled for SystemZXPLINKFrameLowering, but should be. Review: Ulrich Weigand Differential Revision: https://reviews.llvm.org/D115690
81 lines
4.1 KiB
LLVM
81 lines
4.1 KiB
LLVM
; RUN: llc -mtriple=s390x-linux-gnu -frame-pointer=all < %s | FileCheck %s
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; RUN: llc -mtriple=s390x-linux-gnu -frame-pointer=all -filetype=obj < %s \
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; RUN: | llvm-dwarfdump -v -debug-info - | FileCheck --check-prefix=DEBUG %s
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;
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; This is a regression test making sure the location of variables is correct in
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; debugging information, even if they're addressed via the frame pointer.
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; Originally a copy of the AArch64 test, commandeered for SystemZ.
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;
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; First make sure main_arr is where we expect it: %r11 + 164
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;
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; CHECK: main:
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; CHECK: aghi %r15, -568
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; CHECK: la %r2, 168(%r11)
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; CHECK: brasl %r14, populate_array@PLT
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; DEBUG: DW_TAG_variable
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; DEBUG-NOT: DW_TAG
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; DEBUG: DW_AT_location {{.*}}(DW_OP_fbreg +168)
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; DEBUG-NOT: DW_TAG
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; DEBUG: DW_AT_name {{.*}} "main_arr"
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@.str = private unnamed_addr constant [13 x i8] c"Total is %d\0A\00", align 2
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declare void @populate_array(i32*, i32) nounwind
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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declare i32 @sum_array(i32*, i32) nounwind
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define i32 @main() nounwind !dbg !14 {
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entry:
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%retval = alloca i32, align 4
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%main_arr = alloca [100 x i32], align 4
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%val = alloca i32, align 4
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store volatile i32 0, i32* %retval
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call void @llvm.dbg.declare(metadata [100 x i32]* %main_arr, metadata !17, metadata !DIExpression()), !dbg !22
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call void @llvm.dbg.declare(metadata i32* %val, metadata !23, metadata !DIExpression()), !dbg !24
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%arraydecay = getelementptr inbounds [100 x i32], [100 x i32]* %main_arr, i32 0, i32 0, !dbg !25
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call void @populate_array(i32* %arraydecay, i32 100), !dbg !25
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%arraydecay1 = getelementptr inbounds [100 x i32], [100 x i32]* %main_arr, i32 0, i32 0, !dbg !26
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%call = call i32 @sum_array(i32* %arraydecay1, i32 100), !dbg !26
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store i32 %call, i32* %val, align 4, !dbg !26
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%0 = load i32, i32* %val, align 4, !dbg !27
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%call2 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([13 x i8], [13 x i8]* @.str, i32 0, i32 0), i32 %0), !dbg !27
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ret i32 0, !dbg !28
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}
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declare i32 @printf(i8*, ...)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!30}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, producer: "clang version 3.2 ", isOptimized: false, emissionKind: FullDebug, file: !29, enums: !1, retainedTypes: !1, globals: !1, imports: !1)
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!1 = !{}
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!5 = distinct !DISubprogram(name: "populate_array", line: 4, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 4, file: !29, scope: !6, type: !7, retainedNodes: !1)
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!6 = !DIFile(filename: "simple.c", directory: "/home/timnor01/a64-trunk/build")
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!7 = !DISubroutineType(types: !8)
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!8 = !{null, !9, !10}
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!9 = !DIDerivedType(tag: DW_TAG_pointer_type, size: 64, align: 64, baseType: !10)
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!10 = !DIBasicType(tag: DW_TAG_base_type, name: "int", size: 32, align: 32, encoding: DW_ATE_signed)
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!11 = distinct !DISubprogram(name: "sum_array", line: 9, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 9, file: !29, scope: !6, type: !12, retainedNodes: !1)
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!12 = !DISubroutineType(types: !13)
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!13 = !{!10, !9, !10}
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!14 = distinct !DISubprogram(name: "main", line: 18, isLocal: false, isDefinition: true, virtualIndex: 6, flags: DIFlagPrototyped, isOptimized: false, unit: !0, scopeLine: 18, file: !29, scope: !6, type: !15, retainedNodes: !1)
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!15 = !DISubroutineType(types: !16)
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!16 = !{!10}
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!17 = !DILocalVariable(name: "main_arr", line: 19, scope: !18, file: !6, type: !19)
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!18 = distinct !DILexicalBlock(line: 18, column: 16, file: !29, scope: !14)
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!19 = !DICompositeType(tag: DW_TAG_array_type, size: 3200, align: 32, baseType: !10, elements: !{!20})
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!20 = !DISubrange(count: 99)
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!22 = !DILocation(line: 19, column: 7, scope: !18)
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!23 = !DILocalVariable(name: "val", line: 20, scope: !18, file: !6, type: !10)
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!24 = !DILocation(line: 20, column: 7, scope: !18)
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!25 = !DILocation(line: 22, column: 3, scope: !18)
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!26 = !DILocation(line: 23, column: 9, scope: !18)
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!27 = !DILocation(line: 24, column: 3, scope: !18)
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!28 = !DILocation(line: 26, column: 3, scope: !18)
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!29 = !DIFile(filename: "simple.c", directory: "/home/timnor01/a64-trunk/build")
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!30 = !{i32 1, !"Debug Info Version", i32 3}
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