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=x86_64-linux-gnux32 -verify-machineinstrs | FileCheck %s -check-prefix=X32ABI 4 ; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -filetype=obj 5 ; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -filetype=obj 6 ; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnux32 -filetype=obj 7 8 ; Just to prevent the alloca from being optimized away 9 declare void @dummy_use(i32*, i32) 10 11 define i32 @test_basic(i32 %l) #0 { 12 %mem = alloca i32, i32 %l 13 call void @dummy_use (i32* %mem, i32 %l) 14 %terminate = icmp eq i32 %l, 0 15 br i1 %terminate, label %true, label %false 16 17 true: 18 ret i32 0 19 20 false: 21 %newlen = sub i32 %l, 1 22 %retvalue = call i32 @test_basic(i32 %newlen) 23 ret i32 %retvalue 24 25 ; X32-LABEL: test_basic: 26 27 ; X32: cmpl %gs:48, %esp 28 ; X32-NEXT: ja .LBB0_2 29 30 ; X32: pushl $4 31 ; X32-NEXT: pushl $12 32 ; X32-NEXT: calll __morestack 33 ; X32-NEXT: ret 34 35 ; X32: movl %esp, %eax 36 ; X32: subl %ecx, %eax 37 ; X32-NEXT: cmpl %eax, %gs:48 38 39 ; X32: movl %eax, %esp 40 41 ; X32: subl $12, %esp 42 ; X32-NEXT: pushl %ecx 43 ; X32-NEXT: calll __morestack_allocate_stack_space 44 ; X32-NEXT: addl $16, %esp 45 46 ; X64-LABEL: test_basic: 47 48 ; X64: cmpq %fs:112, %rsp 49 ; X64-NEXT: ja .LBB0_2 50 51 ; X64: movabsq $24, %r10 52 ; X64-NEXT: movabsq $0, %r11 53 ; X64-NEXT: callq __morestack 54 ; X64-NEXT: ret 55 56 ; X64: movq %rsp, %[[RDI:rdi|rax]] 57 ; X64: subq %{{.*}}, %[[RDI]] 58 ; X64-NEXT: cmpq %[[RDI]], %fs:112 59 60 ; X64: movq %[[RDI]], %rsp 61 62 ; X64: movq %{{.*}}, %rdi 63 ; X64-NEXT: callq __morestack_allocate_stack_space 64 ; X64: movq %rax, %rdi 65 66 ; X32ABI-LABEL: test_basic: 67 68 ; X32ABI: cmpl %fs:64, %esp 69 ; X32ABI-NEXT: ja .LBB0_2 70 71 ; X32ABI: movl $24, %r10d 72 ; X32ABI-NEXT: movl $0, %r11d 73 ; X32ABI-NEXT: callq __morestack 74 ; X32ABI-NEXT: ret 75 76 ; X32ABI: movl %esp, %[[EDI:edi|eax]] 77 ; X32ABI: subl %{{.*}}, %[[EDI]] 78 ; X32ABI-NEXT: cmpl %[[EDI]], %fs:64 79 80 ; X32ABI: movl %[[EDI]], %esp 81 82 ; X32ABI: movl %{{.*}}, %edi 83 ; X32ABI-NEXT: callq __morestack_allocate_stack_space 84 ; X32ABI: movl %eax, %edi 85 86 } 87 88 attributes #0 = { "split-stack" } 89
