[PATCH] D47097: [WIP][DebugInfo] Preserve scope in auto generated StoreInst

[Anastasis via Phabricator via cfe-commits]

gramanas created this revision.
gramanas added a reviewer: vsk.
Herald added subscribers: JDevlieghere, aprantl.

In this test there is a store instruction generated by clang
for the function argument `int b` where the debug info is missing.

The goal of this patch is to instruct clang to add an artificial
location to auto generated store instructions using
ApplyDebugLocation::CreateArtificial() so that we can
preserve the scope information of the dbg metadata.


Repository:
  rC Clang

https://reviews.llvm.org/D47097

Files:
  test/CodeGen/debug-info-preserve-scope.c


Index: test/CodeGen/debug-info-preserve-scope.c
===================================================================
--- /dev/null
+++ test/CodeGen/debug-info-preserve-scope.c
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -O0 -debug-info-kind=limited -emit-llvm -o - %s | FileCheck %s
+
+static int a;
+
+// CHECK-LABEL: define void @f
+void f(int b) {
+  a = b;
+}
+
+// CHECK: store i32 %b, i32* %b.addr, align 4, !dbg ![[dbgLocForStore:[0-9]+]]
+


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