[llvm] AArch64: Add arm64ec libcall tests for __arm_sc_* functions (PR #144356)

[Matt Arsenault via llvm-commits]

https://github.com/arsenm created https://github.com/llvm/llvm-project/pull/144356

None

>From 4a10a361c2cd8608bf70b692851574e2e8e0ebf9 Mon Sep 17 00:00:00 2001
From: Matt Arsenault <Matthew.Arsenault at amd.com>
Date: Mon, 16 Jun 2025 22:29:22 +0900
Subject: [PATCH] AArch64: Add arm64ec libcall tests for __arm_sc_* functions

---
 llvm/test/CodeGen/AArch64/arm64ec-builtins.ll | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/llvm/test/CodeGen/AArch64/arm64ec-builtins.ll b/llvm/test/CodeGen/AArch64/arm64ec-builtins.ll
index 92b95a90d89a0..53d08a1157776 100644
--- a/llvm/test/CodeGen/AArch64/arm64ec-builtins.ll
+++ b/llvm/test/CodeGen/AArch64/arm64ec-builtins.ll
@@ -43,3 +43,33 @@ define float @f6(float %val, i32 %a) {
   %call = tail call fast float @llvm.ldexp.f32(float %val, i32 %a)
   ret float %call
 }
+
+ at dst = global [512 x i8] zeroinitializer, align 1
+ at src = global [512 x i8] zeroinitializer, align 1
+
+; FIXME: Wrong and probably needs a # prefix
+define void @call__arm_sc_memcpy(i64 noundef %n) #0 {
+; CHECK-LABEL: "#call__arm_sc_memcpy":
+; CHECK: bl __arm_sc_memcpy
+
+  tail call void @llvm.memcpy.p0.p0.i64(ptr align 1 @dst, ptr nonnull align 1 @src, i64 %n, i1 false)
+  ret void
+}
+
+; FIXME: Wrong and probably needs a # prefix
+define void @call__arm_sc_memmove(i64 noundef %n) #0 {
+; CHECK-LABEL: "#call__arm_sc_memmove":
+; CHECK: bl __arm_sc_memmove
+  tail call void @llvm.memmove.p0.p0.i64(ptr align 1 @dst, ptr nonnull align 1 @src, i64 %n, i1 false)
+  ret void
+}
+
+; FIXME: Wrong and probably needs a # prefix
+define void @call__arm_sc_memset(i64 noundef %n) #0 {
+; CHECK-LABEL: "#call__arm_sc_memset":
+; CHECK: bl __arm_sc_memset
+  tail call void @llvm.memset.p0.i64(ptr align 1 @dst, i8 2, i64 %n, i1 false)
+  ret void
+}
+
+attributes #0 = { nounwind "aarch64_pstate_sm_enabled" "target-features"="+sme2" }