[llvm] [InstCombine] Retain debug information on store to null instruction (PR #86105)

[Nikita Popov via llvm-commits]

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@@ -0,0 +1,30 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
+; Verify whether debug information is attached to the store to null/undef instruction
+; !dbg should be present at the end of "store to null" instruction
+; RUN: opt -S -passes='instcombine' < %s | FileCheck %s > /dev/null
+
+source_filename = "test.ll"
+target triple = "hexagon"
+
+define void @_Z3foov() {
+; CHECK-LABEL: define void @_Z3foov() {
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    store i1 true, ptr poison, align 1, !dbg
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nikic wrote:

And now you're back to manually modifying the CHECK lines. You need to run update_test_checks.py with the correct opt binary. The call will look something like `llvm/utils/update_test_checks.py --opt-binary build/bin/opt llvm/test/Transforms/InstCombine/StoreToNull-DbgCheck.ll` (obviously after you have built LLVM with your changes...) If you do that, then this should produce something like `, !dbg [[DBG1:![0-9]+]]`.

https://github.com/llvm/llvm-project/pull/86105