1 ; RUN: llc < %s -mtriple=i686-linux -segmented-stacks | FileCheck %s -check-prefix=X32 2 ; RUN: llc < %s -mtriple=x86_64-linux -segmented-stacks | FileCheck %s -check-prefix=X64 3 4 ; Just to prevent the alloca from being optimized away 5 declare void @dummy_use(i32*, i32) 6 7 define i32 @test_basic(i32 %l) { 8 %mem = alloca i32, i32 %l 9 call void @dummy_use (i32* %mem, i32 %l) 10 %terminate = icmp eq i32 %l, 0 11 br i1 %terminate, label %true, label %false 12 13 true: 14 ret i32 0 15 16 false: 17 %newlen = sub i32 %l, 1 18 %retvalue = call i32 @test_basic(i32 %newlen) 19 ret i32 %retvalue 20 21 ; X32: test_basic: 22 23 ; X32: leal -12(%esp), %ecx 24 ; X32-NEXT: cmpl %gs:48, %ecx 25 26 ; X32: subl $8, %esp 27 ; X32-NEXT: pushl $4 28 ; X32-NEXT: pushl $12 29 ; X32-NEXT: calll __morestack 30 ; X32-NEXT: addl $8, %esp 31 ; X32-NEXT: ret 32 33 ; X32: movl %eax, %esp 34 35 ; X32: subl $12, %esp 36 ; X32-NEXT: pushl %ecx 37 ; X32-NEXT: calll __morestack_allocate_stack_space 38 ; X32-NEXT: addl $16, %esp 39 40 ; X64: test_basic: 41 42 ; X64: leaq -24(%rsp), %r11 43 ; X64-NEXT: cmpq %fs:112, %r11 44 45 ; X64: movabsq $24, %r10 46 ; X64-NEXT: movabsq $0, %r11 47 ; X64-NEXT: callq __morestack 48 ; X64-NEXT: ret 49 50 ; X64: movq %rsp, %rax 51 ; X64-NEXT: subq %rcx, %rax 52 ; X64-NEXT: cmpq %rax, %fs:112 53 54 ; X64: movq %rax, %rsp 55 56 ; X64: movq %rcx, %rdi 57 ; X64-NEXT: callq __morestack_allocate_stack_space 58 59 } 60 61 define i32 @test_nested(i32 * nest %closure, i32 %other) { 62 %addend = load i32 * %closure 63 %result = add i32 %other, %addend 64 ret i32 %result 65 66 ; X32: leal (%esp), %edx 67 ; X32-NEXT: cmpl %gs:48, %edx 68 69 70 ; X32: subl $8, %esp 71 ; X32-NEXT: pushl $4 72 ; X32-NEXT: pushl $0 73 ; X32-NEXT: calll __morestack 74 ; X32-NEXT: addl $8, %esp 75 ; X32-NEXT: ret 76 77 ; X64: leaq (%rsp), %r11 78 ; X64-NEXT: cmpq %fs:112, %r11 79 80 ; X64: movq %r10, %rax 81 ; X64-NEXT: movabsq $0, %r10 82 ; X64-NEXT: movabsq $0, %r11 83 ; X64-NEXT: callq __morestack 84 ; X64-NEXT: ret 85 ; X64: movq %rax, %r10 86 87 } 88
