57 lines
1.6 KiB
LLVM
57 lines
1.6 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-linux-unknown | FileCheck %s --check-prefix=CHECK-64
|
|
; RUN: llc < %s -mtriple=i386-linux-unknown | FileCheck %s --check-prefix=CHECK-32
|
|
|
|
; Test that a large stack offset uses a single add/sub instruction to
|
|
; adjust the stack pointer.
|
|
|
|
define void @foo() nounwind {
|
|
; CHECK-64-LABEL: foo:
|
|
; CHECK-64: movabsq $50000000{{..}}, %rax
|
|
; CHECK-64-NEXT: subq %rax, %rsp
|
|
; CHECK-64-NOT: subq $2147483647, %rsp
|
|
; CHECK-64: movabsq $50000000{{..}}, [[RAX:%r..]]
|
|
; CHECK-64-NEXT: addq [[RAX]], %rsp
|
|
|
|
; CHECK-32-LABEL: foo:
|
|
; CHECK-32: movl $50000000{{..}}, %eax
|
|
; CHECK-32-NEXT: subl %eax, %esp
|
|
; CHECK-32-NOT: subl $2147483647, %esp
|
|
; CHECK-32: movl $50000000{{..}}, [[EAX:%e..]]
|
|
; CHECK-32-NEXT: addl [[EAX]], %esp
|
|
%1 = alloca [5000000000 x i8], align 16
|
|
call void @bar(ptr %1)
|
|
ret void
|
|
}
|
|
|
|
; Verify that we do not clobber the return value.
|
|
|
|
define i32 @foo2() nounwind {
|
|
; CHECK-64-LABEL: foo2:
|
|
; CHECK-64: movl $10, %eax
|
|
; CHECK-64-NOT: movabsq ${{.*}}, %rax
|
|
|
|
; CHECK-32-LABEL: foo2:
|
|
; CHECK-32: movl $10, %eax
|
|
; CHECK-32-NOT: movl ${{.*}}, %eax
|
|
%1 = alloca [5000000000 x i8], align 16
|
|
call void @bar(ptr %1)
|
|
ret i32 10
|
|
}
|
|
|
|
; Verify that we do not clobber EAX when using inreg attribute
|
|
|
|
define i32 @foo3(i32 inreg %x) nounwind {
|
|
; CHECK-64-LABEL: foo3:
|
|
; CHECK-64: movabsq $50000000{{..}}, %rax
|
|
; CHECK-64-NEXT: subq %rax, %rsp
|
|
|
|
; CHECK-32-LABEL: foo3:
|
|
; CHECK-32: subl $2147483647, %esp
|
|
; CHECK-32-NOT: movl ${{.*}}, %eax
|
|
%1 = alloca [5000000000 x i8], align 16
|
|
call void @bar(ptr %1)
|
|
ret i32 %x
|
|
}
|
|
|
|
declare void @bar(ptr)
|