22 lines
605 B
LLVM
22 lines
605 B
LLVM
; RUN: llc -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck %s
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; Ensure that red zone usage occurs.
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define void @testStackProbesOff() {
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%array = alloca [40096 x i8], align 16
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ret void
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; CHECK-LABEL: testStackProbesOff:
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; CHECK: subq $39976, %rsp # imm = 0x9C28
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}
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; Ensure stack probes do not result in red zone usage.
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define void @testStackProbesOn() "probe-stack"="__probestack" {
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%array = alloca [40096 x i8], align 16
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ret void
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; CHECK-LABEL: testStackProbesOn:
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; CHECK: movl $40104, %eax # imm = 0x9CA8
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; CHECK-NEXT: callq __probestack
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; CHECK-NEXT: subq %rax, %rsp
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}
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