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92 lines
3.5 KiB
92 lines
3.5 KiB
4 months ago
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; RUN: opt -indvars -S < %s | FileCheck %s
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;
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; When the induction variable is widened by indvars, check that the debug loc
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; associated with the loop increment is correctly propagated.
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; Also, when the exit condition of a loop is rewritten to be a canonical !=
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; comparison, check that the debug loc of the orginal comparison is reused.
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;
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; Test case obtained from the following source code:
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;
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; ////
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; extern int foo(int); // line 1
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;
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; int bar(int X, int *A) {
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; for (int i = 0; i < X; ++i) // line 4
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; A[i] = foo(i);
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;
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; return A[0];
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; }
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; ///
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;
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; Check that the debug location for the loop increment still refers to
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; line 4, column 26, discriminator 2.
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;
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; Check that the canonicalized compare instruction for the loop exit
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; condition still refers to line 4, column 21, discriminator 1.
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;
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; CHECK-LABEL: for.body:
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; CHECK: [[PHI:%[0-9a-zA-Z.]+]] = phi i64 [
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; CHECK-LABEL: for.inc:
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; CHECK: add nuw nsw i64 [[PHI]], 1, !dbg ![[INDVARMD:[0-9]+]]
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; CHECK: icmp ne i64 %{{.+}}, %{{.+}}, !dbg ![[ICMPMD:[0-9]+]]
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; CHECK-DAG: ![[ICMPMD]] = !DILocation(line: 4, column: 21, scope: ![[ICMPSCOPEMD:[0-9]+]]
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; CHECK-DAG: ![[ICMPSCOPEMD]] = !DILexicalBlockFile(scope: !{{[0-9]+}}, file: !{{[0-9]+}}, discriminator: 1)
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; CHECK-DAG: ![[INDVARMD]] = !DILocation(line: 4, column: 26, scope: ![[INDVARSCOPEMD:[0-9]+]])
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; CHECK-DAG: ![[INDVARSCOPEMD]] = !DILexicalBlockFile(scope: !{{[0-9]+}}, file: !{{[0-9]+}}, discriminator: 2)
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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define i32 @bar(i32 %X, i32* %A) !dbg !5 {
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entry:
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%cmp5 = icmp sgt i32 %X, 0, !dbg !7
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br i1 %cmp5, label %for.body.lr.ph, label %for.end, !dbg !9
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for.body.lr.ph:
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br label %for.body, !dbg !9
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for.body:
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%i.06 = phi i32 [ 0, %for.body.lr.ph ], [ %inc, %for.inc ]
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%call = call i32 @foo(i32 %i.06), !dbg !10
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%idxprom = sext i32 %i.06 to i64, !dbg !11
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %idxprom, !dbg !11
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store i32 %call, i32* %arrayidx, align 4, !dbg !12
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br label %for.inc, !dbg !11
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for.inc:
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%inc = add nsw i32 %i.06, 1, !dbg !13
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%cmp = icmp slt i32 %inc, %X, !dbg !7
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br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge, !dbg !9, !llvm.loop !15
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for.cond.for.end_crit_edge:
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br label %for.end, !dbg !9
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for.end:
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%0 = load i32, i32* %A, align 4, !dbg !17
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ret i32 %0, !dbg !18
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}
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declare i32 @foo(i32)
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!3, !4}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, producer: "", isOptimized: false, runtimeVersion: 0, emissionKind: LineTablesOnly, enums: !2)
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!1 = !DIFile(filename: "test.c", directory: "")
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!2 = !{}
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!3 = !{i32 2, !"Dwarf Version", i32 4}
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!4 = !{i32 2, !"Debug Info Version", i32 3}
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!5 = distinct !DISubprogram(name: "bar", scope: !1, file: !1, line: 3, type: !6, isLocal: false, isDefinition: true, scopeLine: 3, flags: DIFlagPrototyped, isOptimized: false, unit: !0, retainedNodes: !2)
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!6 = !DISubroutineType(types: !2)
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!7 = !DILocation(line: 4, column: 21, scope: !8)
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!8 = !DILexicalBlockFile(scope: !5, file: !1, discriminator: 1)
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!9 = !DILocation(line: 4, column: 3, scope: !8)
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!10 = !DILocation(line: 5, column: 12, scope: !5)
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!11 = !DILocation(line: 5, column: 5, scope: !5)
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!12 = !DILocation(line: 5, column: 10, scope: !5)
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!13 = !DILocation(line: 4, column: 26, scope: !14)
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!14 = !DILexicalBlockFile(scope: !5, file: !1, discriminator: 2)
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!15 = distinct !{!15, !16}
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!16 = !DILocation(line: 4, column: 3, scope: !5)
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!17 = !DILocation(line: 7, column: 10, scope: !5)
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!18 = !DILocation(line: 7, column: 3, scope: !5)
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