forked from OSchip/llvm-project
56 lines
1.8 KiB
LLVM
56 lines
1.8 KiB
LLVM
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -verify-machineinstrs -mcpu=skylake < %s | FileCheck %s
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target datalayout = "e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-pc-linux-gnu"
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; Shows a case where we spill a 32 byte value onto a stack which is only
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; 16 byte aligned. With stack realignment, we can use an aligned spill slot
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; (if we think it's profitable), but without realignment, using a stack
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; slot which is 32 byte aligned or a store which expects 32 byte alignment
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; is incorrect.
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declare void @foo()
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define void @can_realign(<8 x i32>* %p) {
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; CHECK-LABEL: can_realign:
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; CHECK: # %bb.0:
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; CHECK-NEXT: pushq %rbp
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; CHECK-NEXT: .cfi_def_cfa_offset 16
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; CHECK-NEXT: .cfi_offset %rbp, -16
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; CHECK-NEXT: movq %rsp, %rbp
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; CHECK-NEXT: .cfi_def_cfa_register %rbp
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; CHECK-NEXT: andq $-32, %rsp
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; CHECK-NEXT: subq $64, %rsp
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; CHECK-NEXT: vmovaps (%rdi), %ymm0
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; CHECK-NEXT: vmovaps %ymm0, (%rsp)
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: callq foo
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; CHECK-NEXT: .Ltmp0:
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; CHECK-NEXT: movq %rbp, %rsp
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; CHECK-NEXT: popq %rbp
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; CHECK-NEXT: .cfi_def_cfa %rsp, 8
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; CHECK-NEXT: retq
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%val = load <8 x i32>, <8 x i32>* %p, align 32
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call void @foo() ["deopt" (<8 x i32> %val)]
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ret void
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}
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; TODO: currently shows incorrect codegen, FIXME
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define void @no_realign(<8 x i32>* %p) "no-realign-stack" {
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; CHECK-LABEL: no_realign:
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; CHECK: # %bb.0:
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; CHECK-NEXT: subq $40, %rsp
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; CHECK-NEXT: .cfi_def_cfa_offset 48
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; CHECK-NEXT: vmovaps (%rdi), %ymm0
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; CHECK-NEXT: vmovaps %ymm0, (%rsp)
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; CHECK-NEXT: vzeroupper
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; CHECK-NEXT: callq foo
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; CHECK-NEXT: .Ltmp1:
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; CHECK-NEXT: addq $40, %rsp
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; CHECK-NEXT: .cfi_def_cfa_offset 8
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; CHECK-NEXT: retq
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%val = load <8 x i32>, <8 x i32>* %p, align 32
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call void @foo() ["deopt" (<8 x i32> %val)]
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ret void
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}
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