Change SPU C calling convention to match that described in
"SPU Application Binary Interface Specification, v1.9" by
IBM.
Specifically: use r3-r74 to pass parameters and the return value.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@111358 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/CodeGen/CellSPU/arg_ret.ll b/test/CodeGen/CellSPU/arg_ret.ll
new file mode 100644
index 0000000..db8ff10
--- /dev/null
+++ b/test/CodeGen/CellSPU/arg_ret.ll
@@ -0,0 +1,33 @@
+; Test parameter passing and return values
+;RUN: llc --march=cellspu %s -o - | FileCheck %s
+
+; this fits into registers r3-r74
+%paramstruct = type { i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,
+ i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,
+ i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,
+ i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,
+ i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,
+ i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32,i32}
+define ccc i32 @test_regs( %paramstruct %prm )
+{
+;CHECK: lr $3, $74
+;CHECK: bi $lr
+ %1 = extractvalue %paramstruct %prm, 71
+ ret i32 %1
+}
+
+define ccc i32 @test_regs_and_stack( %paramstruct %prm, i32 %stackprm )
+{
+;CHECK-NOT: a $3, $74, $75
+ %1 = extractvalue %paramstruct %prm, 71
+ %2 = add i32 %1, %stackprm
+ ret i32 %2
+}
+
+define ccc %paramstruct @test_return( i32 %param, %paramstruct %prm )
+{
+;CHEKC: lqd $75, 80($sp)
+;CHECK: lr $3, $4
+ ret %paramstruct %prm
+}
+