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| ; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -verify-machineinstrs | FileCheck %s -check-prefix=X32
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -verify-machineinstrs | FileCheck %s -check-prefix=X64
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnux32 -verify-machineinstrs | FileCheck %s -check-prefix=X32ABI
; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -filetype=obj
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -filetype=obj
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnux32 -filetype=obj
; Just to prevent the alloca from being optimized away
declare void @dummy_use(i32*, i32)
define i32 @test_basic(i32 %l) #0 {
%mem = alloca i32, i32 %l
call void @dummy_use (i32* %mem, i32 %l)
%terminate = icmp eq i32 %l, 0
br i1 %terminate, label %true, label %false
true:
ret i32 0
false:
%newlen = sub i32 %l, 1
%retvalue = call i32 @test_basic(i32 %newlen)
ret i32 %retvalue
; X32-LABEL: test_basic:
; X32: cmpl %gs:48, %esp
; X32-NEXT: jbe .LBB0_1
; X32: movl %esp, %eax
; X32: subl %ecx, %eax
; X32-NEXT: cmpl %eax, %gs:48
; X32: movl %eax, %esp
; X32: subl $12, %esp
; X32-NEXT: pushl %ecx
; X32-NEXT: calll __morestack_allocate_stack_space
; X32-NEXT: addl $16, %esp
; X32: pushl $4
; X32-NEXT: pushl $12
; X32-NEXT: calll __morestack
; X32-NEXT: ret
; X64-LABEL: test_basic:
; X64: cmpq %fs:112, %rsp
; X64-NEXT: jbe .LBB0_1
; X64: movq %rsp, %[[RDI:rdi|rax]]
; X64: subq %{{.*}}, %[[RDI]]
; X64-NEXT: cmpq %[[RDI]], %fs:112
; X64: movq %[[RDI]], %rsp
; X64: movq %{{.*}}, %rdi
; X64-NEXT: callq __morestack_allocate_stack_space
; X64: movq %rax, %rdi
; X64: movabsq $24, %r10
; X64-NEXT: movabsq $0, %r11
; X64-NEXT: callq __morestack
; X64-NEXT: ret
; X32ABI-LABEL: test_basic:
; X32ABI: cmpl %fs:64, %esp
; X32ABI-NEXT: jbe .LBB0_1
; X32ABI: movl %esp, %[[EDI:edi|eax]]
; X32ABI: subl %{{.*}}, %[[EDI]]
; X32ABI-NEXT: cmpl %[[EDI]], %fs:64
; X32ABI: movl %[[EDI]], %esp
; X32ABI: movl %{{.*}}, %edi
; X32ABI-NEXT: callq __morestack_allocate_stack_space
; X32ABI: movl %eax, %edi
; X32ABI: movl $24, %r10d
; X32ABI-NEXT: movl $0, %r11d
; X32ABI-NEXT: callq __morestack
; X32ABI-NEXT: ret
}
attributes #0 = { "split-stack" }
|