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https://github.com/c64scene-ar/llvm-6502.git
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bc1fd917f0
This removes the -segmented-stacks command line flag in favor of a per-function "split-stack" attribute. Patch by Luqman Aden and Alex Crichton! git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205997 91177308-0d34-0410-b5e6-96231b3b80d8
67 lines
1.7 KiB
LLVM
67 lines
1.7 KiB
LLVM
; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -verify-machineinstrs | FileCheck %s -check-prefix=X32
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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=i686-linux -filetype=obj
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -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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%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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; X32-LABEL: test_basic:
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; X32: cmpl %gs:48, %esp
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; X32-NEXT: ja .LBB0_2
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; X32: pushl $4
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; X32-NEXT: pushl $12
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; X32-NEXT: calll __morestack
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; X32-NEXT: ret
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; X32: movl %esp, %eax
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; X32: subl %ecx, %eax
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; X32-NEXT: cmpl %eax, %gs:48
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; X32: movl %eax, %esp
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; X32: subl $12, %esp
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; X32-NEXT: pushl %ecx
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; X32-NEXT: calll __morestack_allocate_stack_space
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; X32-NEXT: addl $16, %esp
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; X64-LABEL: test_basic:
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; X64: cmpq %fs:112, %rsp
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; X64-NEXT: ja .LBB0_2
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; X64: movabsq $24, %r10
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; X64-NEXT: movabsq $0, %r11
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; X64-NEXT: callq __morestack
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; X64-NEXT: ret
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; X64: movq %rsp, %[[RDI:rdi|rax]]
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; X64: subq %{{.*}}, %[[RDI]]
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; X64-NEXT: cmpq %[[RDI]], %fs:112
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; X64: movq %[[RDI]], %rsp
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; X64: movq %{{.*}}, %rdi
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; X64-NEXT: callq __morestack_allocate_stack_space
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; X64: movq %rax, %rdi
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}
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attributes #0 = { "split-stack" }
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