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42dcce5386
When the loop exit condition is canonicalized as a != compaison, reuse the debug location of the original (non canonical) comparison. Before this patch, the debug location of the new icmp was obtained from the loop latch terminator. This patch fixes the issue by correctly setting the IRBuilder's "current debug location" to the location of the original compare. Differential Revision: https://reviews.llvm.org/D25953 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@285185 91177308-0d34-0410-b5e6-96231b3b80d8
92 lines
3.5 KiB
LLVM
92 lines
3.5 KiB
LLVM
; 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, variables: !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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