[LoongArch] Add a test case for inline compatibility checks (#117144)

Author: heiher

llvm/test/Transforms/Inline/LoongArch/inline-target-features.ll

@@ -0,0 +1,34 @@
+; RUN: opt < %s -mtriple=loongarch64-unknown-linux-gnu -S -passes=inline | FileCheck %s
+; RUN: opt < %s -mtriple=loongarch64-unknown-linux-gnu -S -passes='cgscc(inline)' | FileCheck %s
+; Check that we only inline when we have compatible target attributes.
+
+target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
+target triple = "loongarch64-unknown-linux-gnu"
+
+define i32 @foo() #0 {
+entry:
+  %call = call i32 (...) @baz()
+  ret i32 %call
+; CHECK-LABEL: foo
+; CHECK: call i32 (...) @baz()
+}
+declare i32 @baz(...) #0
+
+define i32 @bar() #1 {
+entry:
+  %call = call i32 @foo()
+  ret i32 %call
+; CHECK-LABEL: bar
+; CHECK: call i32 (...) @baz()
+}
+
+define i32 @qux() #0 {
+entry:
+  %call = call i32 @bar()
+  ret i32 %call
+; CHECK-LABEL: qux
+; CHECK: call i32 @bar()
+}
+
+attributes #0 = { "target-cpu"="generic-la64" "target-features"="+f,+d" }
+attributes #1 = { "target-cpu"="generic-la64" "target-features"="+f,+d,+lsx,+lasx" }

llvm/test/Transforms/Inline/LoongArch/lit.local.cfg

@@ -0,0 +1,2 @@
+if not "LoongArch" in config.root.targets:
+    config.unsupported = True