[llvm-branch-commits] [clang] CodeGen: Fix implementation of __builtin_trivially_relocate. (PR #140312)

[Peter Collingbourne via llvm-branch-commits]

https://github.com/pcc updated https://github.com/llvm/llvm-project/pull/140312

>From 1399ec4fdf8fe08000b590844f4e24c31a310a01 Mon Sep 17 00:00:00 2001
From: Peter Collingbourne <p...@google.com>
Date: Wed, 21 May 2025 16:20:57 -0700
Subject: [PATCH] Add test with variable count

Created using spr 1.3.6-beta.1
---
 .../CodeGenCXX/cxx2c-trivially-relocatable.cpp     | 14 ++++++++++----
 1 file changed, 10 insertions(+), 4 deletions(-)

diff --git a/clang/test/CodeGenCXX/cxx2c-trivially-relocatable.cpp 
b/clang/test/CodeGenCXX/cxx2c-trivially-relocatable.cpp
index 63f3ba8e74ed5..465e539d363e8 100644
--- a/clang/test/CodeGenCXX/cxx2c-trivially-relocatable.cpp
+++ b/clang/test/CodeGenCXX/cxx2c-trivially-relocatable.cpp
@@ -1,5 +1,7 @@
 // RUN: %clang_cc1 -std=c++26 -triple x86_64-linux-gnu -emit-llvm -o - %s | 
FileCheck %s
 
+typedef __SIZE_TYPE__ size_t;
+
 struct S trivially_relocatable_if_eligible {
     S(const S&);
     ~S();
@@ -8,9 +10,13 @@ struct S trivially_relocatable_if_eligible {
 };
 
 // CHECK: @_Z4testP1SS0_
-// CHECK: call void @llvm.memmove.p0.p0.i64({{.*}}, i64 8
-// CHECK-NOT: __builtin
-// CHECK: ret
-void test(S* source, S* dest) {
+void test(S* source, S* dest, size_t count) {
+    // CHECK: call void @llvm.memmove.p0.p0.i64({{.*}}, i64 8
+    // CHECK-NOT: __builtin
     __builtin_trivially_relocate(dest, source, 1);
+    // CHECK: [[A:%.*]] = load i64, ptr %count.addr
+    // CHECK: [[M:%.*]] = mul i64 [[A]], 8
+    // CHECK: call void @llvm.memmove.p0.p0.i64({{.*}}, i64 [[M]]
+    __builtin_trivially_relocate(dest, source, count);
+    // CHECK: ret
 };

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