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llvm-project/llvm/test/CodeGen/X86/segmented-stacks-dynamic.ll

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Instruction scheduling itinerary for Intel Atom. Adds an instruction itinerary to all x86 instructions, giving each a default latency of 1, using the InstrItinClass IIC_DEFAULT. Sets specific latencies for Atom for the instructions in files X86InstrCMovSetCC.td, X86InstrArithmetic.td, X86InstrControl.td, and X86InstrShiftRotate.td. The Atom latencies for the remainder of the x86 instructions will be set in subsequent patches. Adds a test to verify that the scheduler is working. Also changes the scheduling preference to "Hybrid" for i386 Atom, while leaving x86_64 as ILP. Patch by Preston Gurd! llvm-svn: 149558
2012-02-02 07:20:51 +08:00
; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=X32
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=X64
; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -segmented-stacks -filetype=obj
; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -segmented-stacks -filetype=obj
Split segmented stacks tests into tests for static- and dynamic-size frames. Patch by Brian Anderson. llvm-svn: 147959
2012-01-12 02:51:03 +08:00
; Just to prevent the alloca from being optimized away
declare void @dummy_use(i32*, i32)
define i32 @test_basic(i32 %l) {
%mem = alloca i32, i32 %l
call void @dummy_use (i32* %mem, i32 %l)
%terminate = icmp eq i32 %l, 0
br i1 %terminate, label %true, label %false
true:
ret i32 0
false:
%newlen = sub i32 %l, 1
%retvalue = call i32 @test_basic(i32 %newlen)
ret i32 %retvalue
; X32: test_basic:
; X32: cmpl %gs:48, %esp
; X32-NEXT: ja .LBB0_2
; X32: pushl $4
; X32-NEXT: pushl $12
; X32-NEXT: calll __morestack
; X32-NEXT: ret
; X32: movl %esp, %eax
; X32-NEXT: subl %ecx, %eax
; X32-NEXT: cmpl %eax, %gs:48
; X32: movl %eax, %esp
; X32: subl $12, %esp
; X32-NEXT: pushl %ecx
; X32-NEXT: calll __morestack_allocate_stack_space
; X32-NEXT: addl $16, %esp
; X64: test_basic:
; X64: cmpq %fs:112, %rsp
; X64-NEXT: ja .LBB0_2
; X64: movabsq $24, %r10
; X64-NEXT: movabsq $0, %r11
; X64-NEXT: callq __morestack
; X64-NEXT: ret
; X64: movq %rsp, %rdi
; X64-NEXT: subq %rax, %rdi
; X64-NEXT: cmpq %rdi, %fs:112
; X64: movq %rdi, %rsp
; X64: movq %rax, %rdi
; X64-NEXT: callq __morestack_allocate_stack_space
; X64-NEXT: movq %rax, %rdi
}