[llvm] [NFC] Pre-commit test case for https://github.com/llvm/llvm-project/pull/162348 (PR #162938)

[Mingming Liu via llvm-commits]

https://github.com/mingmingl-llvm created https://github.com/llvm/llvm-project/pull/162938

None

>From 98ba624a5bb4a2a28e013aa54633d4466ad68b5d Mon Sep 17 00:00:00 2001
From: mingmingl <mingmingl at google.com>
Date: Fri, 10 Oct 2025 15:37:43 -0700
Subject: [PATCH] Pre-commit test case for
 https://github.com/llvm/llvm-project/pull/162348

---
 .../X86/global-variable-partition-with-dap.ll | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)
 create mode 100644 llvm/test/CodeGen/X86/global-variable-partition-with-dap.ll

diff --git a/llvm/test/CodeGen/X86/global-variable-partition-with-dap.ll b/llvm/test/CodeGen/X86/global-variable-partition-with-dap.ll
new file mode 100644
index 0000000000000..a0c243be0e7e8
--- /dev/null
+++ b/llvm/test/CodeGen/X86/global-variable-partition-with-dap.ll
@@ -0,0 +1,43 @@
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-i128:128-f80:128-n8:16:32:64-S128"
+target triple = "x86_64-unknown-linux-gnu"
+
+;; A minimal test case. llc will crash if global variables already has a section
+;; prefix. Subsequent PRs will expand on this test case to test the hotness
+;; reconciliation implementation.
+
+; RUN: not llc -mtriple=x86_64-unknown-linux-gnu -relocation-model=pic \
+; RUN:     -partition-static-data-sections=true \
+; RUN:     -data-sections=true  -unique-section-names=false \
+; RUN:     %s -o - 2>&1 | FileCheck %s --check-prefix=ERR
+
+; ERR: Global variable hot_bss already has a section prefix hot
+
+ at hot_bss = internal global i32 0, !section_prefix !17
+
+define void @hot_func() !prof !14 {
+  %9 = load i32, ptr @hot_bss
+  %11 = call i32 (...) @func_taking_arbitrary_param(i32 %9)
+  ret void
+}
+
+declare i32 @func_taking_arbitrary_param(...)
+
+!llvm.module.flags = !{!1}
+
+!1 = !{i32 1, !"ProfileSummary", !2}
+!2 = !{!3, !4, !5, !6, !7, !8, !9, !10}
+!3 = !{!"ProfileFormat", !"InstrProf"}
+!4 = !{!"TotalCount", i64 1460183}
+!5 = !{!"MaxCount", i64 849024}
+!6 = !{!"MaxInternalCount", i64 32769}
+!7 = !{!"MaxFunctionCount", i64 849024}
+!8 = !{!"NumCounts", i64 23627}
+!9 = !{!"NumFunctions", i64 3271}
+!10 = !{!"DetailedSummary", !11}
+!11 = !{!12, !13}
+!12 = !{i32 990000, i64 166, i32 73}
+!13 = !{i32 999999, i64 3, i32 1443}
+!14 = !{!"function_entry_count", i64 100000}
+!15 = !{!"function_entry_count", i64 1}
+!16 = !{!"branch_weights", i32 1, i32 99999}
+!17 = !{!"section_prefix", !"hot"}