derek.holloway
7502bf64a4
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131 lines
4.3 KiB
LLVM
131 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --no_x86_scrub_sp
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; RUN: llc < %s | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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; | case1 | alloca + align < probe_size
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define i32 @foo1(i64 %i) local_unnamed_addr #0 {
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; CHECK-LABEL: foo1:
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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 $-64, %rsp
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; CHECK-NEXT: subq $832, %rsp # imm = 0x340
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; CHECK-NEXT: movl $1, (%rsp,%rdi,4)
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; CHECK-NEXT: movl (%rsp), %eax
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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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%a = alloca i32, i32 200, align 64
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%b = getelementptr inbounds i32, ptr %a, i64 %i
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store volatile i32 1, ptr %b
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%c = load volatile i32, ptr %a
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ret i32 %c
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}
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; | case2 | alloca > probe_size, align > probe_size
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define i32 @foo2(i64 %i) local_unnamed_addr #0 {
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; CHECK-LABEL: foo2:
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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 $-2048, %rsp # imm = 0xF800
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; CHECK-NEXT: subq $2048, %rsp # imm = 0x800
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; CHECK-NEXT: movq $0, (%rsp)
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; CHECK-NEXT: subq $4096, %rsp # imm = 0x1000
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; CHECK-NEXT: movq $0, (%rsp)
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; CHECK-NEXT: subq $2048, %rsp # imm = 0x800
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; CHECK-NEXT: movl $1, (%rsp,%rdi,4)
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; CHECK-NEXT: movl (%rsp), %eax
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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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%a = alloca i32, i32 2000, align 2048
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%b = getelementptr inbounds i32, ptr %a, i64 %i
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store volatile i32 1, ptr %b
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%c = load volatile i32, ptr %a
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ret i32 %c
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}
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; | case3 | alloca < probe_size, align < probe_size, alloca + align > probe_size
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define i32 @foo3(i64 %i) local_unnamed_addr #0 {
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; CHECK-LABEL: foo3:
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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 $-1024, %rsp # imm = 0xFC00
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; CHECK-NEXT: subq $3072, %rsp # imm = 0xC00
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; CHECK-NEXT: movq $0, (%rsp)
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; CHECK-NEXT: subq $1024, %rsp # imm = 0x400
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; CHECK-NEXT: movl $1, (%rsp,%rdi,4)
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; CHECK-NEXT: movl (%rsp), %eax
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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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%a = alloca i32, i32 1000, align 1024
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%b = getelementptr inbounds i32, ptr %a, i64 %i
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store volatile i32 1, ptr %b
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%c = load volatile i32, ptr %a
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ret i32 %c
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}
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; | case4 | alloca + probe_size < probe_size, followed by dynamic alloca
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define i32 @foo4(i64 %i) local_unnamed_addr #0 {
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; CHECK-LABEL: foo4:
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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: andq $-64, %rsp
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; CHECK-NEXT: subq $896, %rsp # imm = 0x380
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; CHECK-NEXT: movq %rsp, %rbx
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; CHECK-NEXT: .cfi_offset %rbx, -24
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; CHECK-NEXT: movl $1, (%rbx,%rdi,4)
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; CHECK-NEXT: movl (%rbx), %ecx
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; CHECK-NEXT: movq %rsp, %rax
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; CHECK-NEXT: leaq 15(,%rcx,4), %rcx
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; CHECK-NEXT: andq $-16, %rcx
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; CHECK-NEXT: subq %rcx, %rax
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; CHECK-NEXT: cmpq %rsp, %rax
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; CHECK-NEXT: jae .LBB3_3
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; CHECK-NEXT: .LBB3_2: # =>This Inner Loop Header: Depth=1
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; CHECK-NEXT: xorq $0, (%rsp)
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; CHECK-NEXT: subq $4096, %rsp # imm = 0x1000
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; CHECK-NEXT: cmpq %rsp, %rax
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; CHECK-NEXT: jb .LBB3_2
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; CHECK-NEXT: .LBB3_3:
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; CHECK-NEXT: andq $-64, %rax
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; CHECK-NEXT: movq %rax, %rsp
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; CHECK-NEXT: movl (%rax), %eax
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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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%a = alloca i32, i32 200, align 64
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%b = getelementptr inbounds i32, ptr %a, i64 %i
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store volatile i32 1, ptr %b
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%c = load volatile i32, ptr %a
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%d = alloca i32, i32 %c, align 64
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%e = load volatile i32, ptr %d
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ret i32 %e
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}
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attributes #0 = {"probe-stack"="inline-asm"}
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