s390x: Fix handling of sret arguments (#5116)

Skip synthetic StructReturn entries in the return value list. Fixes https://github.com/bytecodealliance/wasmtime/issues/5089
2022-10-25 19:40:10 +02:00
parent 441401f9d6
commit 39b3b1d772
4 changed files with 34 additions and 3 deletions
--- a/cranelift/filetests/filetests/isa/s390x/call.clif
+++ b/cranelift/filetests/filetests/isa/s390x/call.clif
@@ -220,3 +220,21 @@ block0(v0: i128, v1: i128, v2: i128, v3: i128, v4: i128, v5: i128, v6: i128, v7:
 ;   vst %v17, 0(%r2)
 ;   br %r14

+
+function %call_sret() -> i64 {
+    fn0 = colocated %g(i64 sret)
+
+block0:
+    v1 = iconst.i64 0
+    call fn0(v1)
+    trap user0
+}
+
+;   stmg %r14, %r15, 112(%r15)
+;   aghi %r15, -160
+;   virtual_sp_offset_adjust 160
+; block0:
+;   lghi %r2, 0
+;   brasl %r14, %g
+;   trap
+