9b8fcd04ef
Due to reversed arguments, the loop start was almost always skipping the whole loop, since FinalStackProbed is probably less than StackPtr for large alignments. The intent was to skip the loop if the first sub on StackPtr made it less than FinalStackProbed already, so flip it. Reviewed By: serge-sans-paille Differential Revision: https://reviews.llvm.org/D139756
76 lines
2.5 KiB
LLVM
76 lines
2.5 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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define i32 @foo_noprotect() local_unnamed_addr {
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; CHECK-LABEL: foo_noprotect:
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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 $-65536, %rsp # imm = 0xFFFF0000
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; CHECK-NEXT: subq $65536, %rsp # imm = 0x10000
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; CHECK-NEXT: movl $1, 392(%rsp)
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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, i64 100, align 65536
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%b = getelementptr inbounds i32, ptr %a, i64 98
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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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define i32 @foo_protect() local_unnamed_addr #0 {
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; CHECK-LABEL: foo_protect:
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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: movq %rsp, %r11
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; CHECK-NEXT: andq $-65536, %r11 # imm = 0xFFFF0000
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; CHECK-NEXT: cmpq %rsp, %r11
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; CHECK-NEXT: je .LBB1_4
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; CHECK-NEXT: # %bb.1:
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; CHECK-NEXT: subq $4096, %rsp # imm = 0x1000
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; CHECK-NEXT: cmpq %r11, %rsp
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; CHECK-NEXT: jb .LBB1_3
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; CHECK-NEXT: .LBB1_2: # =>This Inner Loop Header: Depth=1
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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: cmpq %rsp, %r11
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; CHECK-NEXT: jb .LBB1_2
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; CHECK-NEXT: .LBB1_3:
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; CHECK-NEXT: movq %r11, %rsp
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; CHECK-NEXT: movq $0, (%rsp)
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; CHECK-NEXT: .LBB1_4:
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; CHECK-NEXT: movq %rsp, %r11
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; CHECK-NEXT: subq $65536, %r11 # imm = 0x10000
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; CHECK-NEXT: .LBB1_5: # =>This Inner Loop Header: Depth=1
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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: cmpq %r11, %rsp
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; CHECK-NEXT: jne .LBB1_5
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; CHECK-NEXT: # %bb.6:
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; CHECK-NEXT: movl $1, 392(%rsp)
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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, i64 100, align 65536
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%b = getelementptr inbounds i32, ptr %a, i64 98
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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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attributes #0 = {"probe-stack"="inline-asm"}
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