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| ; 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
%2 = getelementptr inbounds [5000000000 x i8], [5000000000 x i8]* %1, i32 0, i32 0
call void @bar(i8* %2)
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
%2 = getelementptr inbounds [5000000000 x i8], [5000000000 x i8]* %1, i32 0, i32 0
call void @bar(i8* %2)
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
%2 = getelementptr inbounds [5000000000 x i8], [5000000000 x i8]* %1, i32 0, i32 0
call void @bar(i8* %2)
ret i32 %x
}
declare void @bar(i8*)
|