vendor/llvm/llvm-trunk-r300422

1 files changed, 61 insertions, 0 deletions

diff --git a/test/CodeGen/ARM/arg-copy-elide.ll b/test/CodeGen/ARM/arg-copy-elide.ll
new file mode 100644
index 0000000000000..739b560b0833f
--- /dev/null
+++ b/test/CodeGen/ARM/arg-copy-elide.ll
@@ -0,0 +1,61 @@
+; RUN: llc -mtriple=armv7-linux < %s | FileCheck %s
+
+declare arm_aapcscc void @addrof_i32(i32*)
+declare arm_aapcscc void @addrof_i64(i64*)
+
+define arm_aapcscc void @simple(i32, i32, i32, i32, i32 %x) {
+entry:
+  %x.addr = alloca i32
+  store i32 %x, i32* %x.addr
+  call void @addrof_i32(i32* %x.addr)
+  ret void
+}
+
+; CHECK-LABEL: simple:
+; CHECK: push {r11, lr}
+; CHECK: add r0, sp, #8
+; CHECK: bl addrof_i32
+; CHECK: pop {r11, pc}
+
+
+; We need to load %x before calling addrof_i32 now because it could mutate %x in
+; place.
+
+define arm_aapcscc i32 @use_arg(i32, i32, i32, i32, i32 %x) {
+entry:
+  %x.addr = alloca i32
+  store i32 %x, i32* %x.addr
+  call void @addrof_i32(i32* %x.addr)
+  ret i32 %x
+}
+
+; CHECK-LABEL: use_arg:
+; CHECK: push {[[csr:[^ ]*]], lr}
+; CHECK: ldr [[csr]], [sp, #8]
+; CHECK: add r0, sp, #8
+; CHECK: bl addrof_i32
+; CHECK: mov r0, [[csr]]
+; CHECK: pop {[[csr]], pc}
+
+
+define arm_aapcscc i64 @split_i64(i32, i32, i32, i32, i64 %x) {
+entry:
+  %x.addr = alloca i64, align 4
+  store i64 %x, i64* %x.addr, align 4
+  call void @addrof_i64(i64* %x.addr)
+  ret i64 %x
+}
+
+; CHECK-LABEL: split_i64:
+; CHECK: push    {r4, r5, r11, lr}
+; CHECK: sub     sp, sp, #8
+; CHECK: ldr     r4, [sp, #28]
+; CHECK: ldr     r5, [sp, #24]
+; CHECK: mov     r0, sp
+; CHECK: str     r4, [sp, #4]
+; CHECK: str     r5, [sp]
+; CHECK: bl      addrof_i64
+; CHECK: mov     r0, r5
+; CHECK: mov     r1, r4
+; CHECK: add     sp, sp, #8
+; CHECK: pop     {r4, r5, r11, pc}