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An 'if' statement introduces a scope, but in some cases the conditional branch to the then/else blocks had a debug-info attribution that did not include the scope. This led to some inefficiency in the DWARF line table.
46 lines
1.4 KiB
C++
46 lines
1.4 KiB
C++
// RUN: %clang_cc1 -debug-info-kind=limited -gno-column-info -triple=x86_64-pc-linux -emit-llvm %s -o - | FileCheck %s
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// The important thing is that the compare and the conditional branch have
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// locs with the same scope (the lexical block for the 'if'). By turning off
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// column info, they end up with the same !dbg record, which halves the number
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// of checks to verify the scope.
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int c = 2;
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int f() {
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#line 100
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if (int a = 5; a > c)
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return 1;
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return 0;
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}
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// CHECK-LABEL: define {{.*}} @_Z1fv()
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// CHECK: = icmp {{.*}} !dbg [[F_CMP:![0-9]+]]
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// CHECK-NEXT: br i1 {{.*}} !dbg [[F_CMP]]
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int g() {
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#line 200
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if (int a = f())
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return 2;
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return 3;
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}
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// CHECK-LABEL: define {{.*}} @_Z1gv()
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// CHECK: = icmp {{.*}} !dbg [[G_CMP:![0-9]+]]
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// CHECK-NEXT: br i1 {{.*}} !dbg [[G_CMP]]
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int h() {
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#line 300
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if (c > 3)
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return 4;
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return 5;
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}
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// CHECK-LABEL: define {{.*}} @_Z1hv()
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// CHECK: = icmp {{.*}} !dbg [[H_CMP:![0-9]+]]
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// CHECK-NEXT: br i1 {{.*}} !dbg [[H_CMP]]
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// CHECK-DAG: [[F_CMP]] = !DILocation(line: 100, scope: [[F_SCOPE:![0-9]+]]
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// CHECK-DAG: [[F_SCOPE]] = distinct !DILexicalBlock({{.*}} line: 100)
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// CHECK-DAG: [[G_CMP]] = !DILocation(line: 200, scope: [[G_SCOPE:![0-9]+]]
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// CHECK-DAG: [[G_SCOPE]] = distinct !DILexicalBlock({{.*}} line: 200)
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// CHECK-DAG: [[H_CMP]] = !DILocation(line: 300, scope: [[H_SCOPE:![0-9]+]]
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// CHECK-DAG: [[H_SCOPE]] = distinct !DILexicalBlock({{.*}} line: 300)
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