AArch64: Fix undefined behavior in sme calling convention test (#165183)

arsenm · web-flow · commit 1fae9db3d593 · 2025-10-27T02:08:42.000Z
Mismatch of callsite and callee calling conventions
diff --git a/llvm/test/CodeGen/AArch64/sme-support-routines-calling-convention.ll b/llvm/test/CodeGen/AArch64/sme-support-routines-calling-convention.ll
@@ -64,6 +64,6 @@ define i64 @test_sme_calling_convention_x2() nounwind {
   ret i64 %pstate.sm
 }
 
-declare void @__arm_tpidr2_save()
-declare i64 @__arm_get_current_vg()
-declare {i64, i64} @__arm_sme_state()
+declare aarch64_sme_preservemost_from_x0 void @__arm_tpidr2_save()
+declare aarch64_sme_preservemost_from_x1 i64 @__arm_get_current_vg()
+declare aarch64_sme_preservemost_from_x2 {i64, i64} @__arm_sme_state()

Original file line number	Diff line number	Diff line change
`@@ -64,6 +64,6 @@ define i64 @test_sme_calling_convention_x2() nounwind {`
`64`	`64`	`ret i64 %pstate.sm`
`65`	`65`	`}`
`66`	`66`
`67`		`-declare void @__arm_tpidr2_save()`
`68`		`-declare i64 @__arm_get_current_vg()`
`69`		`-declare {i64, i64} @__arm_sme_state()`
	`67`	`+declare aarch64_sme_preservemost_from_x0 void @__arm_tpidr2_save()`
	`68`	`+declare aarch64_sme_preservemost_from_x1 i64 @__arm_get_current_vg()`
	`69`	`+declare aarch64_sme_preservemost_from_x2 {i64, i64} @__arm_sme_state()`