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e322012e46
Set debug location for terminator instruction in loop backedge block (which is an unconditional jump to loop header). We can't copy debug location from original backedges, as there can be several of them, with different debug info locations. So, we follow the approach of SplitBlockPredecessors, and copy the debug info from first non-PHI instruction in the header (i.e. destination block). This is yet another change for PR23837. llvm-svn: 240999
40 lines
1.5 KiB
LLVM
40 lines
1.5 KiB
LLVM
; The loop canonicalization pass should guarantee that there is one backedge
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; for all loops. This allows the -indvars pass to recognize the %IV
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; induction variable in this testcase.
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; RUN: opt < %s -indvars -S | FileCheck %s
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; CHECK: Loop.backedge:
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; CHECK-NOT: br
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; CHECK: br label %Loop, !dbg [[BACKEDGE_LOC:![0-9]+]]
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; CHECK: [[BACKEDGE_LOC]] = !DILocation(line: 101, column: 1, scope: !{{.*}})
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define i32 @test(i1 %C) {
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; <label>:0
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br label %Loop, !dbg !6
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Loop: ; preds = %BE2, %BE1, %0
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%IV = phi i32 [ 1, %0 ], [ %IV2, %BE1 ], [ %IV2, %BE2 ] ; <i32> [#uses=2]
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store i32 %IV, i32* null, !dbg !7
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%IV2 = add i32 %IV, 2, !dbg !8 ; <i32> [#uses=2]
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br i1 %C, label %BE1, label %BE2, !dbg !9
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BE1: ; preds = %Loop
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br label %Loop, !dbg !10
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BE2: ; preds = %n br label %Loop
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br label %Loop, !dbg !11
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}
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!llvm.module.flags = !{!0, !1}
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!0 = !{i32 2, !"Dwarf Version", i32 4}
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!1 = !{i32 2, !"Debug Info Version", i32 3}
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!2 = !{}
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!3 = !DISubroutineType(types: !2)
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!4 = !DIFile(filename: "atomic.cpp", directory: "/tmp")
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!5 = !DISubprogram(name: "test", scope: !4, file: !4, line: 99, type: !3, isLocal: false, isDefinition: true, scopeLine: 100, flags: DIFlagPrototyped, isOptimized: false, variables: !2)
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!6 = !DILocation(line: 100, column: 1, scope: !5)
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!7 = !DILocation(line: 101, column: 1, scope: !5)
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!8 = !DILocation(line: 102, column: 1, scope: !5)
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!9 = !DILocation(line: 103, column: 1, scope: !5)
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!10 = !DILocation(line: 104, column: 1, scope: !5)
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!11 = !DILocation(line: 105, column: 1, scope: !5)
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