1 ; RUN: opt -instcombine %s -S | FileCheck %s
4 ; clang -cc1 -triple thumbv7-apple-ios7.0.0 -S -target-abi apcs-gnu -gdwarf-2 -Os test.c -o test.ll -emit-llvm
10 ; for (int i = 0; i < count; i++)
13 ; rdar://problem/15464571
16 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"
17 target triple = "thumbv7-apple-ios8.0.0"
19 ; Function Attrs: nounwind optsize readnone
20 define void @run(float %r) #0 {
22 tail call void @llvm.dbg.declare(metadata float %r, metadata !11, metadata !{!"0x102"}), !dbg !22
23 %conv = fptosi float %r to i32, !dbg !23
24 tail call void @llvm.dbg.declare(metadata i32 %conv, metadata !12, metadata !{!"0x102"}), !dbg !23
25 %vla = alloca float, i32 %conv, align 4, !dbg !24
26 tail call void @llvm.dbg.declare(metadata float* %vla, metadata !14, metadata !{!"0x102"}), !dbg !24
27 ; The VLA alloca should be described by a dbg.declare:
28 ; CHECK: call void @llvm.dbg.declare(metadata float* %vla, metadata ![[VLA:.*]], metadata {{.*}})
29 ; The VLA alloca and following store into the array should not be lowered to like this:
30 ; CHECK-NOT: call void @llvm.dbg.value(metadata float %r, i64 0, metadata ![[VLA]])
31 ; the backend interprets this as "vla has the location of %r".
32 store float %r, float* %vla, align 4, !dbg !25, !tbaa !26
33 tail call void @llvm.dbg.value(metadata i32 0, i64 0, metadata !18, metadata !{!"0x102"}), !dbg !30
34 %cmp8 = icmp sgt i32 %conv, 0, !dbg !30
35 br i1 %cmp8, label %for.body, label %for.end, !dbg !30
37 for.body: ; preds = %entry, %for.body.for.body_crit_edge
38 %0 = phi float [ %.pre, %for.body.for.body_crit_edge ], [ %r, %entry ]
39 %i.09 = phi i32 [ %inc, %for.body.for.body_crit_edge ], [ 0, %entry ]
40 %arrayidx2 = getelementptr inbounds float* %vla, i32 %i.09, !dbg !31
41 %div = fdiv float %0, %r, !dbg !31
42 store float %div, float* %arrayidx2, align 4, !dbg !31, !tbaa !26
43 %inc = add nsw i32 %i.09, 1, !dbg !30
44 tail call void @llvm.dbg.value(metadata i32 %inc, i64 0, metadata !18, metadata !{!"0x102"}), !dbg !30
45 %exitcond = icmp eq i32 %inc, %conv, !dbg !30
46 br i1 %exitcond, label %for.end, label %for.body.for.body_crit_edge, !dbg !30
48 for.body.for.body_crit_edge: ; preds = %for.body
49 %arrayidx2.phi.trans.insert = getelementptr inbounds float* %vla, i32 %inc
50 %.pre = load float* %arrayidx2.phi.trans.insert, align 4, !dbg !31, !tbaa !26
51 br label %for.body, !dbg !30
53 for.end: ; preds = %for.body, %entry
57 ; Function Attrs: nounwind readnone
58 declare void @llvm.dbg.declare(metadata, metadata, metadata) #1
60 ; Function Attrs: nounwind readnone
61 declare void @llvm.dbg.value(metadata, i64, metadata, metadata) #1
63 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" }
64 attributes #1 = { nounwind readnone }
67 !llvm.module.flags = !{!20, !33}
70 !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]
71 !1 = !{!"<unknown>", !"/Volumes/Data/radar/15464571"}
74 !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]
75 !5 = !{!"test.c", !"/Volumes/Data/radar/15464571"}
76 !6 = !{!"0x29", !5} ; [ DW_TAG_file_type ] [/Volumes/Data/radar/15464571/test.c]
77 !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 ]
79 !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]
80 !10 = !{!11, !12, !14, !18}
81 !11 = !{!"0x101\00r\0016777217\000", !4, !6, !9} ; [ DW_TAG_arg_variable ] [r] [line 1]
82 !12 = !{!"0x100\00count\003\000", !4, !6, !13} ; [ DW_TAG_auto_variable ] [count] [line 3]
83 !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]
84 !14 = !{!"0x100\00vla\004\008192", !4, !6, !15} ; [ DW_TAG_auto_variable ] [vla] [line 4]
85 !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]
87 !17 = !{!"0x21\000\00-1"} ; [ DW_TAG_subrange_type ] [unbounded]
88 !18 = !{!"0x100\00i\006\000", !19, !6, !13} ; [ DW_TAG_auto_variable ] [i] [line 6]
89 !19 = !{!"0xb\006\000\000", !5, !4} ; [ DW_TAG_lexical_block ] [/Volumes/Data/radar/15464571/test.c]
90 !20 = !{i32 2, !"Dwarf Version", i32 2}
91 !21 = !{!"clang version 3.4 "}
92 !22 = !{i32 1, i32 0, !4, null}
93 !23 = !{i32 3, i32 0, !4, null}
94 !24 = !{i32 4, i32 0, !4, null}
95 !25 = !{i32 5, i32 0, !4, null}
96 !26 = !{!27, !27, i64 0}
97 !27 = !{!"float", !28, i64 0}
98 !28 = !{!"omnipotent char", !29, i64 0}
99 !29 = !{!"Simple C/C++ TBAA"}
100 !30 = !{i32 6, i32 0, !19, null}
101 !31 = !{i32 7, i32 0, !19, null}
102 !32 = !{i32 8, i32 0, !4, null}
103 !33 = !{i32 1, !"Debug Info Version", i32 2}