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https://github.com/RPCS3/llvm-mirror.git
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e6b30cee57
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. llvm-svn: 226476
108 lines
5.0 KiB
LLVM
108 lines
5.0 KiB
LLVM
; RUN: llc -O0 -mtriple=x86_64-apple-darwin -filetype=asm %s -o - | FileCheck %s
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; Ensure that we generate an indirect location for the variable length array a.
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; CHECK: ##DEBUG_VALUE: vla:a <- RDX
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; CHECK: DW_OP_breg1
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; rdar://problem/13658587
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;
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; generated from:
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;
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; int vla(int n) {
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; int a[n];
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; a[0] = 42;
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; return a[n-1];
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; }
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;
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; int main(int argc, char** argv) {
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; return vla(argc);
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; }
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; ModuleID = 'vla.c'
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target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
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target triple = "x86_64-apple-macosx10.8.0"
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; Function Attrs: nounwind ssp uwtable
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define i32 @vla(i32 %n) nounwind ssp uwtable {
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entry:
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%n.addr = alloca i32, align 4
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%saved_stack = alloca i8*
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%cleanup.dest.slot = alloca i32
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store i32 %n, i32* %n.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %n.addr, metadata !15, metadata !{!"0x102"}), !dbg !16
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%0 = load i32* %n.addr, align 4, !dbg !17
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%1 = zext i32 %0 to i64, !dbg !17
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%2 = call i8* @llvm.stacksave(), !dbg !17
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store i8* %2, i8** %saved_stack, !dbg !17
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%vla = alloca i32, i64 %1, align 16, !dbg !17
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call void @llvm.dbg.declare(metadata i32* %vla, metadata !18, metadata !{!"0x102\006"}), !dbg !17
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%arrayidx = getelementptr inbounds i32* %vla, i64 0, !dbg !22
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store i32 42, i32* %arrayidx, align 4, !dbg !22
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%3 = load i32* %n.addr, align 4, !dbg !23
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%sub = sub nsw i32 %3, 1, !dbg !23
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%idxprom = sext i32 %sub to i64, !dbg !23
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%arrayidx1 = getelementptr inbounds i32* %vla, i64 %idxprom, !dbg !23
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%4 = load i32* %arrayidx1, align 4, !dbg !23
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store i32 1, i32* %cleanup.dest.slot
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%5 = load i8** %saved_stack, !dbg !24
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call void @llvm.stackrestore(i8* %5), !dbg !24
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ret i32 %4, !dbg !23
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}
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; Function Attrs: nounwind readnone
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declare void @llvm.dbg.declare(metadata, metadata, metadata) nounwind readnone
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; Function Attrs: nounwind
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declare i8* @llvm.stacksave() nounwind
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; Function Attrs: nounwind
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declare void @llvm.stackrestore(i8*) nounwind
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; Function Attrs: nounwind ssp uwtable
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define i32 @main(i32 %argc, i8** %argv) nounwind ssp uwtable {
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entry:
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%retval = alloca i32, align 4
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%argc.addr = alloca i32, align 4
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%argv.addr = alloca i8**, align 8
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store i32 0, i32* %retval
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store i32 %argc, i32* %argc.addr, align 4
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call void @llvm.dbg.declare(metadata i32* %argc.addr, metadata !25, metadata !{!"0x102"}), !dbg !26
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store i8** %argv, i8*** %argv.addr, align 8
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call void @llvm.dbg.declare(metadata i8*** %argv.addr, metadata !27, metadata !{!"0x102"}), !dbg !26
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%0 = load i32* %argc.addr, align 4, !dbg !28
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%call = call i32 @vla(i32 %0), !dbg !28
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ret i32 %call, !dbg !28
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}
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!29}
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!0 = !{!"0x11\0012\00clang version 3.3 \000\00\000\00\001", !1, !2, !2, !3, !2, !2} ; [ DW_TAG_compile_unit ] [/vla.c] [DW_LANG_C99]
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!1 = !{!"vla.c", !""}
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!2 = !{}
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!3 = !{!4, !9}
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!4 = !{!"0x2e\00vla\00vla\00\001\000\001\000\006\00256\000\001", !1, !5, !6, null, i32 (i32)* @vla, null, null, !2} ; [ DW_TAG_subprogram ] [line 1] [def] [vla]
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!5 = !{!"0x29", !1} ; [ DW_TAG_file_type ] [/vla.c]
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!6 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !7, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!7 = !{!8, !8}
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!8 = !{!"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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!9 = !{!"0x2e\00main\00main\00\007\000\001\000\006\00256\000\007", !1, !5, !10, null, i32 (i32, i8**)* @main, null, null, !2} ; [ DW_TAG_subprogram ] [line 7] [def] [main]
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!10 = !{!"0x15\00\000\000\000\000\000\000", i32 0, null, null, !11, null, null, null} ; [ DW_TAG_subroutine_type ] [line 0, size 0, align 0, offset 0] [from ]
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!11 = !{!8, !8, !12}
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!12 = !{!"0xf\00\000\0064\0064\000\000", null, null, !13} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from ]
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!13 = !{!"0xf\00\000\0064\0064\000\000", null, null, !14} ; [ DW_TAG_pointer_type ] [line 0, size 64, align 64, offset 0] [from char]
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!14 = !{!"0x24\00char\000\008\008\000\000\006", null, null} ; [ DW_TAG_base_type ] [char] [line 0, size 8, align 8, offset 0, enc DW_ATE_signed_char]
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!15 = !{!"0x101\00n\0016777217\000", !4, !5, !8} ; [ DW_TAG_arg_variable ] [n] [line 1]
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!16 = !MDLocation(line: 1, scope: !4)
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!17 = !MDLocation(line: 2, scope: !4)
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!18 = !{!"0x100\00a\002\000", !4, !5, !19} ; [ DW_TAG_auto_variable ] [a] [line 2]
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!19 = !{!"0x1\00\000\000\0032\000\000", null, null, !8, !20, i32 0, null, null, null} ; [ DW_TAG_array_type ] [line 0, size 0, align 32, offset 0] [from int]
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!20 = !{!21}
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!21 = !{!"0x21\000\00-1"} ; [ DW_TAG_subrange_type ] [unbounded]
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!22 = !MDLocation(line: 3, scope: !4)
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!23 = !MDLocation(line: 4, scope: !4)
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!24 = !MDLocation(line: 5, scope: !4)
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!25 = !{!"0x101\00argc\0016777223\000", !9, !5, !8} ; [ DW_TAG_arg_variable ] [argc] [line 7]
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!26 = !MDLocation(line: 7, scope: !9)
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!27 = !{!"0x101\00argv\0033554439\000", !9, !5, !12} ; [ DW_TAG_arg_variable ] [argv] [line 7]
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!28 = !MDLocation(line: 8, scope: !9)
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!29 = !{i32 1, !"Debug Info Version", i32 2}
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