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https://github.com/c64scene-ar/llvm-6502.git
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e240cc0b4b
frontends to use a DIExpression with a DW_OP_deref instead. This is not only a much more natural place for this informationl; there is also a technical reason: The FlagIndirectVariable is used to mark a variable that is turned into a reference by virtue of the calling convention; this happens for example to aggregate return values. The inliner, for example, may actually need to undo this indirection to correctly represent the value in its new context. This is impossible to implement because the DIVariable can't be safely modified. We can however safely construct a new DIExpression on the fly. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@226476 91177308-0d34-0410-b5e6-96231b3b80d8
104 lines
5.5 KiB
LLVM
104 lines
5.5 KiB
LLVM
; RUN: opt -instcombine %s -S | FileCheck %s
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;
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; Generate me from:
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; clang -cc1 -triple thumbv7-apple-ios7.0.0 -S -target-abi apcs-gnu -gdwarf-2 -Os test.c -o test.ll -emit-llvm
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; void run(float r)
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; {
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; int count = r;
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; float vla[count];
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; vla[0] = r;
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; for (int i = 0; i < count; i++)
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; vla[i] /= r;
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; }
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; rdar://problem/15464571
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;
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; ModuleID = 'test.c'
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target datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:32:64-v128:32:128-a0:0:32-n32-S32"
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target triple = "thumbv7-apple-ios8.0.0"
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; Function Attrs: nounwind optsize readnone
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define void @run(float %r) #0 {
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entry:
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tail call void @llvm.dbg.declare(metadata float %r, metadata !11, metadata !{!"0x102"}), !dbg !22
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%conv = fptosi float %r to i32, !dbg !23
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tail call void @llvm.dbg.declare(metadata i32 %conv, metadata !12, metadata !{!"0x102"}), !dbg !23
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%vla = alloca float, i32 %conv, align 4, !dbg !24
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tail call void @llvm.dbg.declare(metadata float* %vla, metadata !14, metadata !{!"0x102\006"}), !dbg !24
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; The VLA alloca should be described by a dbg.declare:
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; CHECK: call void @llvm.dbg.declare(metadata float* %vla, metadata ![[VLA:.*]], metadata {{.*}})
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; The VLA alloca and following store into the array should not be lowered to like this:
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; CHECK-NOT: call void @llvm.dbg.value(metadata float %r, i64 0, metadata ![[VLA]])
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; the backend interprets this as "vla has the location of %r".
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store float %r, float* %vla, align 4, !dbg !25, !tbaa !26
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tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !18, metadata !{!"0x102"}), !dbg !30
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%cmp8 = icmp sgt i32 %conv, 0, !dbg !30
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br i1 %cmp8, label %for.body, label %for.end, !dbg !30
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for.body: ; preds = %entry, %for.body.for.body_crit_edge
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%0 = phi float [ %.pre, %for.body.for.body_crit_edge ], [ %r, %entry ]
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%i.09 = phi i32 [ %inc, %for.body.for.body_crit_edge ], [ 0, %entry ]
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%arrayidx2 = getelementptr inbounds float* %vla, i32 %i.09, !dbg !31
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%div = fdiv float %0, %r, !dbg !31
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store float %div, float* %arrayidx2, align 4, !dbg !31, !tbaa !26
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%inc = add nsw i32 %i.09, 1, !dbg !30
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tail call void @llvm.dbg.value(metadata i32 %inc, i64 0, metadata !18, metadata !{!"0x102"}), !dbg !30
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%exitcond = icmp eq i32 %inc, %conv, !dbg !30
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br i1 %exitcond, label %for.end, label %for.body.for.body_crit_edge, !dbg !30
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for.body.for.body_crit_edge: ; preds = %for.body
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%arrayidx2.phi.trans.insert = getelementptr inbounds float* %vla, i32 %inc
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%.pre = load float* %arrayidx2.phi.trans.insert, align 4, !dbg !31, !tbaa !26
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br label %for.body, !dbg !30
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for.end: ; preds = %for.body, %entry
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ret void, !dbg !32
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
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attributes #0 = { nounwind optsize readnone "less-precise-fpmad"="false" "no-frame-pointer-elim"="false" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-realign-stack" "stack-protector-buffer-size"="8" "unsafe-fp-math"="false" "use-soft-float"="false" }
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attributes #1 = { nounwind readnone }
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!20, !33}
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!llvm.ident = !{!21}
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!0 = !{!"0x11\0012\00clang version 3.4 \001\00\000\00\000", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/Volumes/Data/radar/15464571/<unknown>] [DW_LANG_C99]
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!1 = !{!"<unknown>", !"/Volumes/Data/radar/15464571"}
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!2 = !{i32 0}
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!3 = !{!4}
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!4 = !{!"0x2e\00run\00run\00\001\000\001\000\006\00256\001\002", !5, !6, !7, null, void (float)* @run, null, null, !10} ; [ DW_TAG_subprogram ] [line 1] [def] [scope 2] [run]
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!5 = !{!"test.c", !"/Volumes/Data/radar/15464571"}
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!6 = !{!"0x29", !5} ; [ DW_TAG_file_type ] [/Volumes/Data/radar/15464571/test.c]
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!7 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !8, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!8 = !{null, !9}
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!9 = !{!"0x24\00float\000\0032\0032\000\000\004", null, null} ; [ DW_TAG_base_type ] [float] [line 0, size 32, align 32, offset 0, enc DW_ATE_float]
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!10 = !{!11, !12, !14, !18}
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!11 = !{!"0x101\00r\0016777217\000", !4, !6, !9} ; [ DW_TAG_arg_variable ] [r] [line 1]
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!12 = !{!"0x100\00count\003\000", !4, !6, !13} ; [ DW_TAG_auto_variable ] [count] [line 3]
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!13 = !{!"0x24\00int\000\0032\0032\000\000\005", null, null} ; [ DW_TAG_base_type ] [int] [line 0, size 32, align 32, offset 0, enc DW_ATE_signed]
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!14 = !{!"0x100\00vla\004\000", !4, !6, !15} ; [ DW_TAG_auto_variable ] [vla] [line 4]
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!15 = !{!"0x1\00\000\000\0032\000\000", null, null, !9, !16, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from float]
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!16 = !{!17}
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!17 = !{!"0x21\000\00-1"} ; [ DW_TAG_subrange_type ] [unbounded]
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!18 = !{!"0x100\00i\006\000", !19, !6, !13} ; [ DW_TAG_auto_variable ] [i] [line 6]
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!19 = !{!"0xb\006\000\000", !5, !4} ; [ DW_TAG_lexical_block ] [/Volumes/Data/radar/15464571/test.c]
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!20 = !{i32 2, !"Dwarf Version", i32 2}
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!21 = !{!"clang version 3.4 "}
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!22 = !MDLocation(line: 1, scope: !4)
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!23 = !MDLocation(line: 3, scope: !4)
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!24 = !MDLocation(line: 4, scope: !4)
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!25 = !MDLocation(line: 5, scope: !4)
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!26 = !{!27, !27, i64 0}
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!27 = !{!"float", !28, i64 0}
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!28 = !{!"omnipotent char", !29, i64 0}
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!29 = !{!"Simple C/C++ TBAA"}
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!30 = !MDLocation(line: 6, scope: !19)
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!31 = !MDLocation(line: 7, scope: !19)
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!32 = !MDLocation(line: 8, scope: !4)
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!33 = !{i32 1, !"Debug Info Version", i32 2}
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