b6043f9867
Split a virtual register with hint may generate COPY instructions in multiple cold basic blocks, and increase code size. So disable this split when the function is optimized for size.
78 lines
3.1 KiB
LLVM
78 lines
3.1 KiB
LLVM
; RUN: llc -filetype=asm %s -o - | FileCheck %s
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; Test large integral function arguments passed in multiple registers.
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;
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; Generated from (-Os):
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;
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; signed long long g;
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; void write(signed long long offset);
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; signed long long foo(signed long long offset) {
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; if (offset != g)
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; write(offset);
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; return offset;
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; }
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source_filename = "test.ii"
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target datalayout = "e-m:o-p:32:32-i64:64-a:0:32-n32-S128"
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target triple = "thumbv7k-apple-watchos2.0.0"
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@g = local_unnamed_addr global i64 0, align 8, !dbg !0
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; Function Attrs: optsize ssp
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define i64 @_Z3foox(i64 returned) local_unnamed_addr #0 !dbg !13 {
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tail call void @llvm.dbg.value(metadata i64 %0, metadata !17, metadata !DIExpression()), !dbg !18
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; CHECK: @DEBUG_VALUE: foo:offset <- [DW_OP_LLVM_fragment 0 32] $r5
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; CHECK: @DEBUG_VALUE: foo:offset <- [DW_OP_LLVM_fragment 32 32] $r4
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%2 = load i64, ptr @g, align 8, !dbg !19, !tbaa !21
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%3 = icmp eq i64 %2, %0, !dbg !19
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br i1 %3, label %5, label %4, !dbg !25
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; <label>:4: ; preds = %1
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tail call void @_Z5writex(i64 %0) #3, !dbg !26
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br label %5, !dbg !26
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; <label>:5: ; preds = %1, %4
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ret i64 %0, !dbg !27
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}
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; Function Attrs: optsize
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declare void @_Z5writex(i64) local_unnamed_addr #1
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; Function Attrs: nounwind readnone speculatable
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declare void @llvm.dbg.value(metadata, metadata, metadata) #2
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attributes #0 = { optsize ssp }
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attributes #1 = { optsize }
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attributes #2 = { nounwind readnone speculatable }
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attributes #3 = { optsize }
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!llvm.dbg.cu = !{!2}
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!llvm.module.flags = !{!7, !8, !9, !10, !11}
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!0 = !DIGlobalVariableExpression(var: !1, expr: !DIExpression())
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!1 = distinct !DIGlobalVariable(name: "g", scope: !2, file: !3, line: 1, type: !6, isLocal: false, isDefinition: true)
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!2 = distinct !DICompileUnit(language: DW_LANG_C_plus_plus, file: !3, producer: "clang version 6.0.0 (trunk 312148) (llvm/trunk 312165)", isOptimized: true, runtimeVersion: 0, emissionKind: FullDebug, enums: !4, globals: !5)
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!3 = !DIFile(filename: "test.ii", directory: "/")
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!4 = !{}
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!5 = !{!0}
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!6 = !DIBasicType(name: "long long int", size: 64, encoding: DW_ATE_signed)
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!7 = !{i32 2, !"Dwarf Version", i32 4}
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!8 = !{i32 2, !"Debug Info Version", i32 3}
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!9 = !{i32 1, !"wchar_size", i32 4}
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!10 = !{i32 1, !"min_enum_size", i32 4}
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!11 = !{i32 7, !"PIC Level", i32 2}
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!13 = distinct !DISubprogram(name: "foo", linkageName: "_Z3foox", scope: !3, file: !3, line: 3, type: !14, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: true, unit: !2, retainedNodes: !16)
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!14 = !DISubroutineType(types: !15)
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!15 = !{!6, !6}
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!16 = !{!17}
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!17 = !DILocalVariable(name: "offset", arg: 1, scope: !13, file: !3, line: 3, type: !6)
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!18 = !DILocation(line: 3, scope: !13)
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!19 = !DILocation(line: 4, scope: !20)
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!20 = distinct !DILexicalBlock(scope: !13, file: !3, line: 4)
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!21 = !{!22, !22, i64 0}
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!22 = !{!"long long", !23, i64 0}
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!23 = !{!"omnipotent char", !24, i64 0}
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!24 = !{!"Simple C++ TBAA"}
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!25 = !DILocation(line: 4, scope: !13)
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!26 = !DILocation(line: 5, scope: !20)
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!27 = !DILocation(line: 6, scope: !13)
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