First cut at supporting .debug_loc section.

This is used to track variable information.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104649 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 239 insertions, 0 deletions

diff --git a/test/DebugInfo/2010-05-25-DotDebugLoc.ll b/test/DebugInfo/2010-05-25-DotDebugLoc.ll
new file mode 100644
index 0000000..e6a7a6c
--- /dev/null
+++ b/test/DebugInfo/2010-05-25-DotDebugLoc.ll
@@ -0,0 +1,239 @@
+; RUN: llc -O2 < %s | grep debug_loc13
+; Test to check .debug_loc support. This test case emits 14 debug_loc entries.
+
+%0 = type { double }
+
+define hidden %0 @__divsc3(float %a, float %b, float %c, float %d) nounwind readnone {
+entry:
+  tail call void @llvm.dbg.value(metadata !{float %a}, i64 0, metadata !0)
+  tail call void @llvm.dbg.value(metadata !{float %b}, i64 0, metadata !11)
+  tail call void @llvm.dbg.value(metadata !{float %c}, i64 0, metadata !12)
+  tail call void @llvm.dbg.value(metadata !{float %d}, i64 0, metadata !13)
+  %0 = tail call float @fabsf(float %c) nounwind readnone, !dbg !19 ; <float> [#uses=1]
+  %1 = tail call float @fabsf(float %d) nounwind readnone, !dbg !19 ; <float> [#uses=1]
+  %2 = fcmp olt float %0, %1, !dbg !19            ; <i1> [#uses=1]
+  br i1 %2, label %bb, label %bb1, !dbg !19
+
+bb:                                               ; preds = %entry
+  %3 = fdiv float %c, %d, !dbg !20                ; <float> [#uses=3]
+  tail call void @llvm.dbg.value(metadata !{float %3}, i64 0, metadata !16), !dbg !20
+  %4 = fmul float %3, %c, !dbg !21                ; <float> [#uses=1]
+  %5 = fadd float %4, %d, !dbg !21                ; <float> [#uses=2]
+  tail call void @llvm.dbg.value(metadata !{float %5}, i64 0, metadata !14), !dbg !21
+  %6 = fmul float %3, %a, !dbg !22                ; <float> [#uses=1]
+  %7 = fadd float %6, %b, !dbg !22                ; <float> [#uses=1]
+  %8 = fdiv float %7, %5, !dbg !22                ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %8}, i64 0, metadata !17), !dbg !22
+  %9 = fmul float %3, %b, !dbg !23                ; <float> [#uses=1]
+  %10 = fsub float %9, %a, !dbg !23               ; <float> [#uses=1]
+  %11 = fdiv float %10, %5, !dbg !23              ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %11}, i64 0, metadata !18), !dbg !23
+  br label %bb2, !dbg !23
+
+bb1:                                              ; preds = %entry
+  %12 = fdiv float %d, %c, !dbg !24               ; <float> [#uses=3]
+  tail call void @llvm.dbg.value(metadata !{float %12}, i64 0, metadata !16), !dbg !24
+  %13 = fmul float %12, %d, !dbg !25              ; <float> [#uses=1]
+  %14 = fadd float %13, %c, !dbg !25              ; <float> [#uses=2]
+  tail call void @llvm.dbg.value(metadata !{float %14}, i64 0, metadata !14), !dbg !25
+  %15 = fmul float %12, %b, !dbg !26              ; <float> [#uses=1]
+  %16 = fadd float %15, %a, !dbg !26              ; <float> [#uses=1]
+  %17 = fdiv float %16, %14, !dbg !26             ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %17}, i64 0, metadata !17), !dbg !26
+  %18 = fmul float %12, %a, !dbg !27              ; <float> [#uses=1]
+  %19 = fsub float %b, %18, !dbg !27              ; <float> [#uses=1]
+  %20 = fdiv float %19, %14, !dbg !27             ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %20}, i64 0, metadata !18), !dbg !27
+  br label %bb2, !dbg !27
+
+bb2:                                              ; preds = %bb1, %bb
+  %y.0 = phi float [ %11, %bb ], [ %20, %bb1 ]    ; <float> [#uses=5]
+  %x.0 = phi float [ %8, %bb ], [ %17, %bb1 ]     ; <float> [#uses=5]
+  %21 = fcmp uno float %x.0, 0.000000e+00, !dbg !28 ; <i1> [#uses=1]
+  %22 = fcmp uno float %y.0, 0.000000e+00, !dbg !28 ; <i1> [#uses=1]
+  %or.cond = and i1 %21, %22                      ; <i1> [#uses=1]
+  br i1 %or.cond, label %bb4, label %bb46, !dbg !28
+
+bb4:                                              ; preds = %bb2
+  %23 = fcmp une float %c, 0.000000e+00, !dbg !29 ; <i1> [#uses=1]
+  %24 = fcmp une float %d, 0.000000e+00, !dbg !29 ; <i1> [#uses=1]
+  %or.cond93 = or i1 %23, %24                     ; <i1> [#uses=1]
+  br i1 %or.cond93, label %bb9, label %bb6, !dbg !29
+
+bb6:                                              ; preds = %bb4
+  %25 = fcmp uno float %a, 0.000000e+00, !dbg !29 ; <i1> [#uses=1]
+  %26 = fcmp uno float %b, 0.000000e+00, !dbg !29 ; <i1> [#uses=1]
+  %or.cond94 = and i1 %25, %26                    ; <i1> [#uses=1]
+  br i1 %or.cond94, label %bb9, label %bb8, !dbg !29
+
+bb8:                                              ; preds = %bb6
+  %27 = tail call float @copysignf(float 0x7FF0000000000000, float %c) nounwind readnone, !dbg !30 ; <float> [#uses=2]
+  %28 = fmul float %27, %a, !dbg !30              ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %28}, i64 0, metadata !17), !dbg !30
+  %29 = fmul float %27, %b, !dbg !31              ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %29}, i64 0, metadata !18), !dbg !31
+  br label %bb46, !dbg !31
+
+bb9:                                              ; preds = %bb6, %bb4
+  %30 = fcmp ord float %a, 0.000000e+00           ; <i1> [#uses=1]
+  %31 = fsub float %a, %a, !dbg !32               ; <float> [#uses=3]
+  %32 = fcmp uno float %31, 0.000000e+00          ; <i1> [#uses=1]
+  %33 = and i1 %30, %32, !dbg !32                 ; <i1> [#uses=2]
+  br i1 %33, label %bb14, label %bb11, !dbg !32
+
+bb11:                                             ; preds = %bb9
+  %34 = fcmp ord float %b, 0.000000e+00           ; <i1> [#uses=1]
+  %35 = fsub float %b, %b, !dbg !32               ; <float> [#uses=1]
+  %36 = fcmp uno float %35, 0.000000e+00          ; <i1> [#uses=1]
+  %37 = and i1 %34, %36, !dbg !32                 ; <i1> [#uses=1]
+  br i1 %37, label %bb14, label %bb27, !dbg !32
+
+bb14:                                             ; preds = %bb11, %bb9
+  %38 = fsub float %c, %c, !dbg !32               ; <float> [#uses=1]
+  %39 = fcmp ord float %38, 0.000000e+00          ; <i1> [#uses=1]
+  br i1 %39, label %bb15, label %bb27, !dbg !32
+
+bb15:                                             ; preds = %bb14
+  %40 = fsub float %d, %d, !dbg !32               ; <float> [#uses=1]
+  %41 = fcmp ord float %40, 0.000000e+00          ; <i1> [#uses=1]
+  br i1 %41, label %bb16, label %bb27, !dbg !32
+
+bb16:                                             ; preds = %bb15
+  %iftmp.0.0 = select i1 %33, float 1.000000e+00, float 0.000000e+00 ; <float> [#uses=1]
+  %42 = tail call float @copysignf(float %iftmp.0.0, float %a) nounwind readnone, !dbg !33 ; <float> [#uses=2]
+  tail call void @llvm.dbg.value(metadata !{float %42}, i64 0, metadata !0), !dbg !33
+  %43 = fcmp ord float %b, 0.000000e+00           ; <i1> [#uses=1]
+  %44 = fsub float %b, %b, !dbg !34               ; <float> [#uses=1]
+  %45 = fcmp uno float %44, 0.000000e+00          ; <i1> [#uses=1]
+  %46 = and i1 %43, %45, !dbg !34                 ; <i1> [#uses=1]
+  %iftmp.1.0 = select i1 %46, float 1.000000e+00, float 0.000000e+00 ; <float> [#uses=1]
+  %47 = tail call float @copysignf(float %iftmp.1.0, float %b) nounwind readnone, !dbg !34 ; <float> [#uses=2]
+  tail call void @llvm.dbg.value(metadata !{float %47}, i64 0, metadata !11), !dbg !34
+  %48 = fmul float %42, %c, !dbg !35              ; <float> [#uses=1]
+  %49 = fmul float %47, %d, !dbg !35              ; <float> [#uses=1]
+  %50 = fadd float %48, %49, !dbg !35             ; <float> [#uses=1]
+  %51 = fmul float %50, 0x7FF0000000000000, !dbg !35 ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %51}, i64 0, metadata !17), !dbg !35
+  %52 = fmul float %47, %c, !dbg !36              ; <float> [#uses=1]
+  %53 = fmul float %42, %d, !dbg !36              ; <float> [#uses=1]
+  %54 = fsub float %52, %53, !dbg !36             ; <float> [#uses=1]
+  %55 = fmul float %54, 0x7FF0000000000000, !dbg !36 ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %55}, i64 0, metadata !18), !dbg !36
+  br label %bb46, !dbg !36
+
+bb27:                                             ; preds = %bb15, %bb14, %bb11
+  %56 = fcmp ord float %c, 0.000000e+00           ; <i1> [#uses=1]
+  %57 = fsub float %c, %c, !dbg !37               ; <float> [#uses=1]
+  %58 = fcmp uno float %57, 0.000000e+00          ; <i1> [#uses=1]
+  %59 = and i1 %56, %58, !dbg !37                 ; <i1> [#uses=2]
+  br i1 %59, label %bb33, label %bb30, !dbg !37
+
+bb30:                                             ; preds = %bb27
+  %60 = fcmp ord float %d, 0.000000e+00           ; <i1> [#uses=1]
+  %61 = fsub float %d, %d, !dbg !37               ; <float> [#uses=1]
+  %62 = fcmp uno float %61, 0.000000e+00          ; <i1> [#uses=1]
+  %63 = and i1 %60, %62, !dbg !37                 ; <i1> [#uses=1]
+  %64 = fcmp ord float %31, 0.000000e+00          ; <i1> [#uses=1]
+  %or.cond95 = and i1 %63, %64                    ; <i1> [#uses=1]
+  br i1 %or.cond95, label %bb34, label %bb46, !dbg !37
+
+bb33:                                             ; preds = %bb27
+  %.old = fcmp ord float %31, 0.000000e+00        ; <i1> [#uses=1]
+  br i1 %.old, label %bb34, label %bb46, !dbg !37
+
+bb34:                                             ; preds = %bb33, %bb30
+  %65 = fsub float %b, %b, !dbg !37               ; <float> [#uses=1]
+  %66 = fcmp ord float %65, 0.000000e+00          ; <i1> [#uses=1]
+  br i1 %66, label %bb35, label %bb46, !dbg !37
+
+bb35:                                             ; preds = %bb34
+  %iftmp.2.0 = select i1 %59, float 1.000000e+00, float 0.000000e+00 ; <float> [#uses=1]
+  %67 = tail call float @copysignf(float %iftmp.2.0, float %c) nounwind readnone, !dbg !38 ; <float> [#uses=2]
+  tail call void @llvm.dbg.value(metadata !{float %67}, i64 0, metadata !12), !dbg !38
+  %68 = fcmp ord float %d, 0.000000e+00           ; <i1> [#uses=1]
+  %69 = fsub float %d, %d, !dbg !39               ; <float> [#uses=1]
+  %70 = fcmp uno float %69, 0.000000e+00          ; <i1> [#uses=1]
+  %71 = and i1 %68, %70, !dbg !39                 ; <i1> [#uses=1]
+  %iftmp.3.0 = select i1 %71, float 1.000000e+00, float 0.000000e+00 ; <float> [#uses=1]
+  %72 = tail call float @copysignf(float %iftmp.3.0, float %d) nounwind readnone, !dbg !39 ; <float> [#uses=2]
+  tail call void @llvm.dbg.value(metadata !{float %72}, i64 0, metadata !13), !dbg !39
+  %73 = fmul float %67, %a, !dbg !40              ; <float> [#uses=1]
+  %74 = fmul float %72, %b, !dbg !40              ; <float> [#uses=1]
+  %75 = fadd float %73, %74, !dbg !40             ; <float> [#uses=1]
+  %76 = fmul float %75, 0.000000e+00, !dbg !40    ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %76}, i64 0, metadata !17), !dbg !40
+  %77 = fmul float %67, %b, !dbg !41              ; <float> [#uses=1]
+  %78 = fmul float %72, %a, !dbg !41              ; <float> [#uses=1]
+  %79 = fsub float %77, %78, !dbg !41             ; <float> [#uses=1]
+  %80 = fmul float %79, 0.000000e+00, !dbg !41    ; <float> [#uses=1]
+  tail call void @llvm.dbg.value(metadata !{float %80}, i64 0, metadata !18), !dbg !41
+  br label %bb46, !dbg !41
+
+bb46:                                             ; preds = %bb35, %bb34, %bb33, %bb30, %bb16, %bb8, %bb2
+  %y.1 = phi float [ %80, %bb35 ], [ %y.0, %bb34 ], [ %y.0, %bb33 ], [ %y.0, %bb30 ], [ %55, %bb16 ], [ %29, %bb8 ], [ %y.0, %bb2 ] ; <float> [#uses=2]
+  %x.1 = phi float [ %76, %bb35 ], [ %x.0, %bb34 ], [ %x.0, %bb33 ], [ %x.0, %bb30 ], [ %51, %bb16 ], [ %28, %bb8 ], [ %x.0, %bb2 ] ; <float> [#uses=1]
+  %81 = fmul float %y.1, 0.000000e+00, !dbg !42   ; <float> [#uses=1]
+  %82 = fadd float %y.1, 0.000000e+00, !dbg !42   ; <float> [#uses=1]
+  %tmpr = fadd float %x.1, %81, !dbg !42          ; <float> [#uses=1]
+  %tmp89 = bitcast float %tmpr to i32             ; <i32> [#uses=1]
+  %tmp90 = zext i32 %tmp89 to i64                 ; <i64> [#uses=1]
+  %tmp85 = bitcast float %82 to i32               ; <i32> [#uses=1]
+  %tmp86 = zext i32 %tmp85 to i64                 ; <i64> [#uses=1]
+  %tmp87 = shl i64 %tmp86, 32                     ; <i64> [#uses=1]
+  %ins = or i64 %tmp90, %tmp87                    ; <i64> [#uses=1]
+  %tmp84 = bitcast i64 %ins to double             ; <double> [#uses=1]
+  %mrv75 = insertvalue %0 undef, double %tmp84, 0, !dbg !42 ; <%0> [#uses=1]
+  ret %0 %mrv75, !dbg !42
+}
+
+declare float @fabsf(float)
+
+declare float @copysignf(float, float) nounwind readnone
+
+declare void @llvm.dbg.value(metadata, i64, metadata) nounwind readnone
+
+!llvm.dbg.lv = !{!0, !11, !12, !13, !14, !16, !17, !18}
+
+!0 = metadata !{i32 524545, metadata !1, metadata !"a", metadata !2, i32 1921, metadata !9} ; [ DW_TAG_arg_variable ]
+!1 = metadata !{i32 524334, i32 0, metadata !2, metadata !"__divsc3", metadata !"__divsc3", metadata !"__divsc3", metadata !2, i32 1922, metadata !4, i1 false, i1 true, i32 0, i32 0, null, i1 false, i1 true} ; [ DW_TAG_subprogram ]
+!2 = metadata !{i32 524329, metadata !"libgcc2.c", metadata !"/Users/yash/clean/LG.D/gcc/../../llvmgcc/gcc", metadata !3} ; [ DW_TAG_file_type ]
+!3 = metadata !{i32 524305, i32 0, i32 1, metadata !"libgcc2.c", metadata !"/Users/yash/clean/LG.D/gcc/../../llvmgcc/gcc", metadata !"4.2.1 (Based on Apple Inc. build 5658) (LLVM build)", i1 true, i1 true, metadata !"", i32 0} ; [ DW_TAG_compile_unit ]
+!4 = metadata !{i32 524309, metadata !2, metadata !"", metadata !2, i32 0, i64 0, i64 0, i64 0, i32 0, null, metadata !5, i32 0, null} ; [ DW_TAG_subroutine_type ]
+!5 = metadata !{metadata !6, metadata !9, metadata !9, metadata !9, metadata !9}
+!6 = metadata !{i32 524310, metadata !7, metadata !"SCtype", metadata !7, i32 170, i64 0, i64 0, i64 0, i32 0, metadata !8} ; [ DW_TAG_typedef ]
+!7 = metadata !{i32 524329, metadata !"libgcc2.h", metadata !"/Users/yash/clean/LG.D/gcc/../../llvmgcc/gcc", metadata !3} ; [ DW_TAG_file_type ]
+!8 = metadata !{i32 524324, metadata !2, metadata !"complex float", metadata !2, i32 0, i64 64, i64 32, i64 0, i32 0, i32 3} ; [ DW_TAG_base_type ]
+!9 = metadata !{i32 524310, metadata !7, metadata !"SFtype", metadata !7, i32 167, i64 0, i64 0, i64 0, i32 0, metadata !10} ; [ DW_TAG_typedef ]
+!10 = metadata !{i32 524324, metadata !2, metadata !"float", metadata !2, i32 0, i64 32, i64 32, i64 0, i32 0, i32 4} ; [ DW_TAG_base_type ]
+!11 = metadata !{i32 524545, metadata !1, metadata !"b", metadata !2, i32 1921, metadata !9} ; [ DW_TAG_arg_variable ]
+!12 = metadata !{i32 524545, metadata !1, metadata !"c", metadata !2, i32 1921, metadata !9} ; [ DW_TAG_arg_variable ]
+!13 = metadata !{i32 524545, metadata !1, metadata !"d", metadata !2, i32 1921, metadata !9} ; [ DW_TAG_arg_variable ]
+!14 = metadata !{i32 524544, metadata !15, metadata !"denom", metadata !2, i32 1923, metadata !9} ; [ DW_TAG_auto_variable ]
+!15 = metadata !{i32 524299, metadata !1, i32 1922, i32 0} ; [ DW_TAG_lexical_block ]
+!16 = metadata !{i32 524544, metadata !15, metadata !"ratio", metadata !2, i32 1923, metadata !9} ; [ DW_TAG_auto_variable ]
+!17 = metadata !{i32 524544, metadata !15, metadata !"x", metadata !2, i32 1923, metadata !9} ; [ DW_TAG_auto_variable ]
+!18 = metadata !{i32 524544, metadata !15, metadata !"y", metadata !2, i32 1923, metadata !9} ; [ DW_TAG_auto_variable ]
+!19 = metadata !{i32 1929, i32 0, metadata !15, null}
+!20 = metadata !{i32 1931, i32 0, metadata !15, null}
+!21 = metadata !{i32 1932, i32 0, metadata !15, null}
+!22 = metadata !{i32 1933, i32 0, metadata !15, null}
+!23 = metadata !{i32 1934, i32 0, metadata !15, null}
+!24 = metadata !{i32 1938, i32 0, metadata !15, null}
+!25 = metadata !{i32 1939, i32 0, metadata !15, null}
+!26 = metadata !{i32 1940, i32 0, metadata !15, null}
+!27 = metadata !{i32 1941, i32 0, metadata !15, null}
+!28 = metadata !{i32 1946, i32 0, metadata !15, null}
+!29 = metadata !{i32 1948, i32 0, metadata !15, null}
+!30 = metadata !{i32 1950, i32 0, metadata !15, null}
+!31 = metadata !{i32 1951, i32 0, metadata !15, null}
+!32 = metadata !{i32 1953, i32 0, metadata !15, null}
+!33 = metadata !{i32 1955, i32 0, metadata !15, null}
+!34 = metadata !{i32 1956, i32 0, metadata !15, null}
+!35 = metadata !{i32 1957, i32 0, metadata !15, null}
+!36 = metadata !{i32 1958, i32 0, metadata !15, null}
+!37 = metadata !{i32 1960, i32 0, metadata !15, null}
+!38 = metadata !{i32 1962, i32 0, metadata !15, null}
+!39 = metadata !{i32 1963, i32 0, metadata !15, null}
+!40 = metadata !{i32 1964, i32 0, metadata !15, null}
+!41 = metadata !{i32 1965, i32 0, metadata !15, null}
+!42 = metadata !{i32 1969, i32 0, metadata !15, null}