83 lines
3.0 KiB
LLVM
83 lines
3.0 KiB
LLVM
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; This test checks if debug loc is propagated to load/store created by GVN/Instcombine.
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; RUN: opt < %s -gvn -S | FileCheck %s --check-prefixes=ALL
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; RUN: opt < %s -gvn -instcombine -S | FileCheck %s --check-prefixes=ALL
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; struct node {
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; int *v;
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; struct desc *descs;
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; };
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; struct desc {
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; struct node *node;
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; };
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; extern int bar(void *v, void* n);
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; int test(struct desc *desc)
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; {
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; void *v, *n;
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; v = !desc ? ((void *)0) : desc->node->v; // Line 15
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; n = &desc->node->descs[0]; // Line 16
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; return bar(v, n);
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; }
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; Line 16, Column 13:
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; n = &desc->node->descs[0];
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; ^
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target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
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target triple = "aarch64--linux-gnu"
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%struct.desc = type { %struct.node* }
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%struct.node = type { i32*, %struct.desc* }
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define i32 @test_no_null_opt(%struct.desc* readonly %desc) local_unnamed_addr #0 !dbg !4 {
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entry:
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%tobool = icmp eq %struct.desc* %desc, null
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br i1 %tobool, label %cond.end, label %cond.false, !dbg !9
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; ALL: br i1 %tobool, label %entry.cond.end_crit_edge, label %cond.false, !dbg [[LOC_15_6:![0-9]+]]
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; ALL: entry.cond.end_crit_edge:
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; ALL: load %struct.node*, %struct.node** null, align {{[0-9]+}}, !dbg [[LOC_16_13:![0-9]+]]
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cond.false:
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%0 = bitcast %struct.desc* %desc to i8***, !dbg !11
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%1 = load i8**, i8*** %0, align 8, !dbg !11
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%2 = load i8*, i8** %1, align 8
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br label %cond.end, !dbg !9
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cond.end:
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; ALL: phi %struct.node* [ %3, %cond.false ], [ %.pre, %entry.cond.end_crit_edge ]
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; ALL: phi i8* [ %2, %cond.false ], [ null, %entry.cond.end_crit_edge ]
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%3 = phi i8* [ %2, %cond.false ], [ null, %entry ], !dbg !9
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%node2 = getelementptr inbounds %struct.desc, %struct.desc* %desc, i64 0, i32 0
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%4 = load %struct.node*, %struct.node** %node2, align 8, !dbg !10
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%descs = getelementptr inbounds %struct.node, %struct.node* %4, i64 0, i32 1
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%5 = bitcast %struct.desc** %descs to i8**
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%6 = load i8*, i8** %5, align 8
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%call = tail call i32 @bar(i8* %3, i8* %6)
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ret i32 %call
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}
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attributes #0 = { null_pointer_is_valid }
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declare i32 @bar(i8*, i8*) local_unnamed_addr #1
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!llvm.dbg.cu = !{!0}
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!llvm.module.flags = !{!2, !3}
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!0 = distinct !DICompileUnit(language: DW_LANG_C99, file: !1, emissionKind: FullDebug)
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!1 = !DIFile(filename: "test.c", directory: ".")
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!2 = !{i32 2, !"Dwarf Version", i32 4}
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!3 = !{i32 2, !"Debug Info Version", i32 3}
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!4 = distinct !DISubprogram(name: "test_no_null_opt", scope: !1, file: !1, line: 12, type: !5, isLocal: false, isDefinition: true, scopeLine: 13, flags: DIFlagPrototyped, isOptimized: true, unit: !0, retainedNodes: !8)
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!5 = !DISubroutineType(types: !6)
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!6 = !{!7}
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!7 = !DIBasicType(name: "int", size: 32, encoding: DW_ATE_signed)
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!8 = !{}
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!9 = !DILocation(line: 15, column: 6, scope: !4)
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!10 = !DILocation(line: 16, column: 13, scope: !4)
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!11 = !DILocation(line: 15, column: 34, scope: !4)
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;ALL: [[SCOPE:![0-9]+]] = distinct !DISubprogram(name: "test_no_null_opt",{{.*}}
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;ALL: [[LOC_15_6]] = !DILocation(line: 15, column: 6, scope: [[SCOPE]])
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;ALL: [[LOC_16_13]] = !DILocation(line: 16, column: 13, scope: [[SCOPE]])
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