1; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -verify-machineinstrs | FileCheck %s -check-prefix=X32 2; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -verify-machineinstrs | FileCheck %s -check-prefix=X64 3; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -filetype=obj 4; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -filetype=obj 5 6; Just to prevent the alloca from being optimized away 7declare void @dummy_use(i32*, i32) 8 9define i32 @test_basic(i32 %l) #0 { 10 %mem = alloca i32, i32 %l 11 call void @dummy_use (i32* %mem, i32 %l) 12 %terminate = icmp eq i32 %l, 0 13 br i1 %terminate, label %true, label %false 14 15true: 16 ret i32 0 17 18false: 19 %newlen = sub i32 %l, 1 20 %retvalue = call i32 @test_basic(i32 %newlen) 21 ret i32 %retvalue 22 23; X32-LABEL: test_basic: 24 25; X32: cmpl %gs:48, %esp 26; X32-NEXT: ja .LBB0_2 27 28; X32: pushl $4 29; X32-NEXT: pushl $12 30; X32-NEXT: calll __morestack 31; X32-NEXT: ret 32 33; X32: movl %esp, %eax 34; X32: subl %ecx, %eax 35; X32-NEXT: cmpl %eax, %gs:48 36 37; X32: movl %eax, %esp 38 39; X32: subl $12, %esp 40; X32-NEXT: pushl %ecx 41; X32-NEXT: calll __morestack_allocate_stack_space 42; X32-NEXT: addl $16, %esp 43 44; X64-LABEL: test_basic: 45 46; X64: cmpq %fs:112, %rsp 47; X64-NEXT: ja .LBB0_2 48 49; X64: movabsq $24, %r10 50; X64-NEXT: movabsq $0, %r11 51; X64-NEXT: callq __morestack 52; X64-NEXT: ret 53 54; X64: movq %rsp, %[[RDI:rdi|rax]] 55; X64: subq %{{.*}}, %[[RDI]] 56; X64-NEXT: cmpq %[[RDI]], %fs:112 57 58; X64: movq %[[RDI]], %rsp 59 60; X64: movq %{{.*}}, %rdi 61; X64-NEXT: callq __morestack_allocate_stack_space 62; X64: movq %rax, %rdi 63 64} 65 66attributes #0 = { "split-stack" } 67