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

1 files changed, 33 insertions, 0 deletions

diff --git a/test/CodeGen/CellSPU/arg_ret.ll b/test/CodeGen/CellSPU/arg_ret.ll
new file mode 100644
index 0000000000..db8ff10466
--- /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
+}
+