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d09b64fc25
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
65 lines
1.7 KiB
LLVM
65 lines
1.7 KiB
LLVM
; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=X32
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -segmented-stacks -verify-machineinstrs | FileCheck %s -check-prefix=X64
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; RUN: llc < %s -mcpu=generic -mtriple=i686-linux -segmented-stacks -filetype=obj
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; RUN: llc < %s -mcpu=generic -mtriple=x86_64-linux -segmented-stacks -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) {
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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: 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-NEXT: 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: 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
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; X64-NEXT: subq %rax, %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 %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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}
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