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771f5d1cd6
Determining proper debug locations for instructions created in PHITransAddr is tricky. We use a simple approach here and simply copy debug locations from instructions computing load address to "corresponding" instructions re-creating the address computation in predecessor basic blocks. This may not always be correct, given all the rearrangement and simplification going on, and debug locations may jump around a lot, as the basic blocks we copy locations between may be very far from each other. Still, this would work good in most simple cases (e.g. when chain of address computing instruction is short, or our mapping turns out to be 1-to-1), and we desire to have *some* reasonable debug locations associated with newly inserted instructions. See http://reviews.llvm.org/D10351 review thread for more details. Test Plan: regression test suite Reviewers: spatel, dblaikie Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D10351 llvm-svn: 239479
53 lines
1.9 KiB
LLVM
53 lines
1.9 KiB
LLVM
; RUN: opt -basicaa -gvn -S < %s | FileCheck %s
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target datalayout = "e-p:64:64:64"
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; CHECK-LABEL: @foo(
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; CHECK: entry.end_crit_edge:
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; CHECK: %j.phi.trans.insert = sext i32 %x to i64, !dbg [[J_LOC:![0-9]+]]
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; CHECK: %q.phi.trans.insert = getelementptr {{.*}}, !dbg [[Q_LOC:![0-9]+]]
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; CHECK: %n.pre = load i32, i32* %q.phi.trans.insert, !dbg [[N_LOC:![0-9]+]]
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; CHECK: then:
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; CHECK: store i32 %z
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; CHECK: end:
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; CHECK: %n = phi i32 [ %n.pre, %entry.end_crit_edge ], [ %z, %then ], !dbg [[N_LOC]]
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; CHECK: ret i32 %n
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; CHECK-DAG: [[J_LOC]] = !DILocation(line: 45, column: 1, scope: !{{.*}})
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; CHECK-DAG: [[Q_LOC]] = !DILocation(line: 46, column: 1, scope: !{{.*}})
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; CHECK-DAG: [[N_LOC]] = !DILocation(line: 47, column: 1, scope: !{{.*}})
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@G = external global [100 x i32]
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define i32 @foo(i32 %x, i32 %z) {
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entry:
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%tobool = icmp eq i32 %z, 0, !dbg !7
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br i1 %tobool, label %end, label %then, !dbg !7
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then:
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%i = sext i32 %x to i64, !dbg !8
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%p = getelementptr [100 x i32], [100 x i32]* @G, i64 0, i64 %i, !dbg !8
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store i32 %z, i32* %p, !dbg !8
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br label %end, !dbg !8
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end:
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%j = sext i32 %x to i64, !dbg !9
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%q = getelementptr [100 x i32], [100 x i32]* @G, i64 0, i64 %j, !dbg !10
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%n = load i32, i32* %q, !dbg !11
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ret i32 %n, !dbg !11
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}
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!llvm.module.flags = !{!0, !1, !2}
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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 = !{i32 1, !"PIC Level", i32 2}
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!3 = !{}
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!4 = !DISubroutineType(types: !3)
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!5 = !DIFile(filename: "a.cc", directory: "/tmp")
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!6 = !DISubprogram(name: "foo", scope: !5, file: !5, line: 42, type: !4, isLocal: false, isDefinition: true, scopeLine: 43, flags: DIFlagPrototyped, isOptimized: false, function: i32 (i32, i32)* @foo, variables: !3)
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!7 = !DILocation(line: 43, column: 1, scope: !6)
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!8 = !DILocation(line: 44, column: 1, scope: !6)
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!9 = !DILocation(line: 45, column: 1, scope: !6)
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!10 = !DILocation(line: 46, column: 1, scope: !6)
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!11 = !DILocation(line: 47, column: 1, scope: !6)
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