derek.holloway
7502bf64a4
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39 lines
1.2 KiB
LLVM
39 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
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; RUN: llc -global-isel=1 -mtriple=x86_64-linux-gnu -o - %s | FileCheck %s
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declare void @use_addr(ptr)
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declare ptr @llvm.stacksave.p0()
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declare void @llvm.stackrestore.p0(ptr)
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define void @test_scoped_alloca(i64 %n) {
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; CHECK-LABEL: test_scoped_alloca:
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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: pushq %rbx
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; CHECK-NEXT: pushq %rax
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; CHECK-NEXT: .cfi_offset %rbx, -24
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; CHECK-NEXT: movq %rsp, %rbx
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; CHECK-NEXT: movq %rsp, %rax
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; CHECK-NEXT: addq $15, %rdi
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; CHECK-NEXT: andq $-16, %rdi
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; CHECK-NEXT: subq %rdi, %rax
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; CHECK-NEXT: movq %rax, %rsp
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; CHECK-NEXT: movq %rax, %rdi
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; CHECK-NEXT: callq use_addr
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; CHECK-NEXT: movq %rbx, %rsp
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; CHECK-NEXT: leaq -8(%rbp), %rsp
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; CHECK-NEXT: popq %rbx
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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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%sp = call ptr @llvm.stacksave.p0()
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%addr = alloca i8, i64 %n
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call void @use_addr(ptr %addr)
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call void @llvm.stackrestore.p0(ptr %sp)
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ret void
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}
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