| ; RUN: llc -mtriple x86_64-w64-mingw32 %s -o - | FileCheck %s |
| |
| declare void @foo({ float, double }* byval) |
| @G = external constant { float, double } |
| |
| define void @bar() |
| { |
| ; Make sure we're creating a temporary stack slot, rather than just passing |
| ; the pointer through unmodified. |
| ; CHECK-LABEL: @bar |
| ; CHECK: movq .refptr.G(%rip), %rax |
| ; CHECK: movq (%rax), %rcx |
| ; CHECK: movq 8(%rax), %rax |
| ; CHECK: movq %rax, 40(%rsp) |
| ; CHECK: movq %rcx, 32(%rsp) |
| ; CHECK: leaq 32(%rsp), %rcx |
| call void @foo({ float, double }* byval @G) |
| ret void |
| } |
| |
| define void @baz({ float, double }* byval %arg) |
| { |
| ; On Win64 the byval is effectively ignored on declarations, since we do |
| ; pass a real pointer in registers. However, by our semantics if we pass |
| ; the pointer on to another byval function, we do need to make a copy. |
| ; CHECK-LABEL: @baz |
| ; CHECK: movq (%rcx), %rax |
| ; CHECK: movq 8(%rcx), %rcx |
| ; CHECK: movq %rcx, 40(%rsp) |
| ; CHECK: movq %rax, 32(%rsp) |
| ; CHECK: leaq 32(%rsp), %rcx |
| call void @foo({ float, double }* byval %arg) |
| ret void |
| } |