a390c9905d
MOV64ri results in a significantly longer encoding, and use of this operator is fairly avoidable as we can always check the size of the immediate we're using. This is an updated version of D99045. Co-authored-by: Simonas Kazlauskas <git@kazlauskas.me> Reviewed By: craig.topper Differential Revision: https://reviews.llvm.org/D116458
215 lines
6.1 KiB
LLVM
215 lines
6.1 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -verify-machineinstrs | FileCheck %s -check-prefix=X86
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -verify-machineinstrs | FileCheck %s -check-prefix=X64
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnux32 -verify-machineinstrs | FileCheck %s -check-prefix=X32ABI
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; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -filetype=obj
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -filetype=obj
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux-gnux32 -filetype=obj
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; Just to prevent the alloca from being optimized away
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declare void @dummy_use(i32*, i32)
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define i32 @test_basic(i32 %l) #0 {
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; X86-LABEL: test_basic:
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; X86: # %bb.0:
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; X86-NEXT: cmpl %gs:48, %esp
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; X86-NEXT: jbe .LBB0_1
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; X86-NEXT: .LBB0_2:
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; X86-NEXT: pushl %ebp
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; X86-NEXT: .cfi_def_cfa_offset 8
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; X86-NEXT: .cfi_offset %ebp, -8
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; X86-NEXT: movl %esp, %ebp
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; X86-NEXT: .cfi_def_cfa_register %ebp
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; X86-NEXT: pushl %esi
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; X86-NEXT: pushl %eax
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; X86-NEXT: .cfi_offset %esi, -12
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; X86-NEXT: movl 8(%ebp), %esi
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; X86-NEXT: leal 15(,%esi,4), %ecx
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; X86-NEXT: andl $-16, %ecx
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; X86-NEXT: movl %esp, %eax
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; X86-NEXT: subl %ecx, %eax
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; X86-NEXT: cmpl %eax, %gs:48
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; X86-NEXT: jg .LBB0_4
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; X86-NEXT: # %bb.3:
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; X86-NEXT: movl %eax, %esp
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; X86-NEXT: jmp .LBB0_5
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; X86-NEXT: .LBB0_4:
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; X86-NEXT: subl $12, %esp
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; X86-NEXT: pushl %ecx
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; X86-NEXT: calll __morestack_allocate_stack_space
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; X86-NEXT: addl $16, %esp
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; X86-NEXT: .LBB0_5:
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; X86-NEXT: subl $8, %esp
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; X86-NEXT: pushl %esi
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; X86-NEXT: pushl %eax
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; X86-NEXT: calll dummy_use@PLT
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; X86-NEXT: addl $16, %esp
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; X86-NEXT: testl %esi, %esi
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; X86-NEXT: je .LBB0_6
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; X86-NEXT: # %bb.8: # %false
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; X86-NEXT: addl $-1, %esi
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; X86-NEXT: subl $12, %esp
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; X86-NEXT: pushl %esi
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; X86-NEXT: calll test_basic@PLT
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; X86-NEXT: jmp .LBB0_7
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; X86-NEXT: .LBB0_6: # %true
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; X86-NEXT: xorl %eax, %eax
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; X86-NEXT: .LBB0_7: # %true
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; X86-NEXT: leal -4(%ebp), %esp
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; X86-NEXT: popl %esi
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; X86-NEXT: popl %ebp
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; X86-NEXT: .cfi_def_cfa %esp, 4
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; X86-NEXT: retl
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; X86-NEXT: .LBB0_1:
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; X86-NEXT: .cfi_restore %ebp
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; X86-NEXT: .cfi_restore %esi
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; X86-NEXT: pushl $4
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; X86-NEXT: pushl $12
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; X86-NEXT: calll __morestack
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; X86-NEXT: retl
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; X86-NEXT: jmp .LBB0_2
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;
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; X64-LABEL: test_basic:
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; X64: # %bb.0:
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; X64-NEXT: cmpq %fs:112, %rsp
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; X64-NEXT: jbe .LBB0_1
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; X64-NEXT: .LBB0_2:
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; X64-NEXT: pushq %rbp
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; X64-NEXT: .cfi_def_cfa_offset 16
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; X64-NEXT: .cfi_offset %rbp, -16
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; X64-NEXT: movq %rsp, %rbp
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; X64-NEXT: .cfi_def_cfa_register %rbp
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; X64-NEXT: pushq %rbx
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; X64-NEXT: pushq %rax
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; X64-NEXT: .cfi_offset %rbx, -24
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; X64-NEXT: movl %edi, %ebx
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; X64-NEXT: movl %edi, %eax
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; X64-NEXT: leaq 15(,%rax,4), %rax
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; X64-NEXT: andq $-16, %rax
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; X64-NEXT: movq %rsp, %rdi
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; X64-NEXT: subq %rax, %rdi
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; X64-NEXT: cmpq %rdi, %fs:112
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; X64-NEXT: jg .LBB0_4
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; X64-NEXT: # %bb.3:
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; X64-NEXT: movq %rdi, %rsp
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; X64-NEXT: jmp .LBB0_5
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; X64-NEXT: .LBB0_4:
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; X64-NEXT: movq %rax, %rdi
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; X64-NEXT: callq __morestack_allocate_stack_space
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; X64-NEXT: movq %rax, %rdi
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; X64-NEXT: .LBB0_5:
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; X64-NEXT: movl %ebx, %esi
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; X64-NEXT: callq dummy_use@PLT
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; X64-NEXT: testl %ebx, %ebx
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; X64-NEXT: je .LBB0_6
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; X64-NEXT: # %bb.8: # %false
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; X64-NEXT: addl $-1, %ebx
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; X64-NEXT: movl %ebx, %edi
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; X64-NEXT: callq test_basic@PLT
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; X64-NEXT: jmp .LBB0_7
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; X64-NEXT: .LBB0_6: # %true
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; X64-NEXT: xorl %eax, %eax
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; X64-NEXT: .LBB0_7: # %true
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; X64-NEXT: leaq -8(%rbp), %rsp
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; X64-NEXT: popq %rbx
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; X64-NEXT: popq %rbp
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; X64-NEXT: .cfi_def_cfa %rsp, 8
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; X64-NEXT: retq
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; X64-NEXT: .LBB0_1:
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; X64-NEXT: .cfi_restore %rbx
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; X64-NEXT: .cfi_restore %rbp
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; X64-NEXT: movl $24, %r10d
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; X64-NEXT: movl $0, %r11d
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; X64-NEXT: callq __morestack
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; X64-NEXT: retq
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; X64-NEXT: jmp .LBB0_2
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;
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; X32ABI-LABEL: test_basic:
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; X32ABI: # %bb.0:
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; X32ABI-NEXT: cmpl %fs:64, %esp
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; X32ABI-NEXT: jbe .LBB0_1
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; X32ABI-NEXT: .LBB0_2:
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; X32ABI-NEXT: pushq %rbp
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; X32ABI-NEXT: .cfi_def_cfa_offset 16
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; X32ABI-NEXT: .cfi_offset %rbp, -16
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; X32ABI-NEXT: movl %esp, %ebp
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; X32ABI-NEXT: .cfi_def_cfa_register %rbp
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; X32ABI-NEXT: pushq %rbx
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; X32ABI-NEXT: pushq %rax
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; X32ABI-NEXT: .cfi_offset %rbx, -24
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; X32ABI-NEXT: movl %edi, %ebx
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; X32ABI-NEXT: leal 15(,%rbx,4), %eax
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; X32ABI-NEXT: andl $-16, %eax
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; X32ABI-NEXT: movl %esp, %edi
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; X32ABI-NEXT: subl %eax, %edi
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; X32ABI-NEXT: cmpl %edi, %fs:64
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; X32ABI-NEXT: jg .LBB0_4
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; X32ABI-NEXT: # %bb.3:
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; X32ABI-NEXT: movl %edi, %esp
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; X32ABI-NEXT: jmp .LBB0_5
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; X32ABI-NEXT: .LBB0_4:
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; X32ABI-NEXT: movl %eax, %edi
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; X32ABI-NEXT: callq __morestack_allocate_stack_space
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; X32ABI-NEXT: movl %eax, %edi
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; X32ABI-NEXT: .LBB0_5:
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; X32ABI-NEXT: movl %ebx, %esi
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; X32ABI-NEXT: callq dummy_use@PLT
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; X32ABI-NEXT: testl %ebx, %ebx
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; X32ABI-NEXT: je .LBB0_6
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; X32ABI-NEXT: # %bb.8: # %false
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; X32ABI-NEXT: addl $-1, %ebx
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; X32ABI-NEXT: movl %ebx, %edi
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; X32ABI-NEXT: callq test_basic@PLT
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; X32ABI-NEXT: jmp .LBB0_7
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; X32ABI-NEXT: .LBB0_6: # %true
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; X32ABI-NEXT: xorl %eax, %eax
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; X32ABI-NEXT: .LBB0_7: # %true
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; X32ABI-NEXT: leal -8(%ebp), %esp
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; X32ABI-NEXT: popq %rbx
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; X32ABI-NEXT: popq %rbp
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; X32ABI-NEXT: .cfi_def_cfa %rsp, 8
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; X32ABI-NEXT: retq
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; X32ABI-NEXT: .LBB0_1:
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; X32ABI-NEXT: .cfi_def_cfa_register 4294967294
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; X32ABI-NEXT: .cfi_restore %rbx
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; X32ABI-NEXT: .cfi_restore %rbp
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; X32ABI-NEXT: movl $24, %r10d
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; X32ABI-NEXT: movl $0, %r11d
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; X32ABI-NEXT: callq __morestack
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; X32ABI-NEXT: retq
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; X32ABI-NEXT: jmp .LBB0_2
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%mem = alloca i32, i32 %l
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call void @dummy_use (i32* %mem, i32 %l)
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%terminate = icmp eq i32 %l, 0
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br i1 %terminate, label %true, label %false
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true:
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ret i32 0
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false:
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%newlen = sub i32 %l, 1
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%retvalue = call i32 @test_basic(i32 %newlen)
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ret i32 %retvalue
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}
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attributes #0 = { "split-stack" }
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