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 7 declare void @dummy_use(i32*, i32) 8 9 define 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 15 true: 16 ret i32 0 17 18 false: 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 66 attributes #0 = { "split-stack" } 67
