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6e99d9f4a2
This commit adds prologue code emission for stack probe function calls. Reviewed By: majnemer Differential Revision: https://reviews.llvm.org/D34387 llvm-svn: 306010
30 lines
1.1 KiB
LLVM
30 lines
1.1 KiB
LLVM
; RUN: llc -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck --check-prefix=X86-LINUX %s
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; RUN: llc -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck --check-prefix=X64-LINUX %s
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; RUN: llc -mtriple=x86_64-pc-linux-gnu -code-model=large < %s -o - | FileCheck --check-prefix=X64-LINUX-LARGE %s
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declare void @use([40096 x i8]*)
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; Ensure calls to __probestack occur for large stack frames
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define void @test() "probe-stack"="__probestack" {
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%array = alloca [40096 x i8], align 16
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call void @use([40096 x i8]* %array)
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ret void
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; X86-LINUX-LABEL: test:
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; X86-LINUX: movl $40124, %eax # imm = 0x9CBC
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; X86-LINUX-NEXT: calll __probestack
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; X86-LINUX-NEXT: subl %eax, %esp
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; X64-LINUX-LABEL: test:
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; X64-LINUX: movl $40104, %eax # imm = 0x9CA8
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; X64-LINUX-NEXT: callq __probestack
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; X64-LINUX-NEXT: subq %rax, %rsp
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; X64-LINUX-LARGE-LABEL: test:
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; X64-LINUX-LARGE: movl $40104, %eax # imm = 0x9CA8
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; X64-LINUX-LARGE-NEXT: movabsq $__probestack, %r11
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; X64-LINUX-LARGE-NEXT: callq *%r11
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; X64-LINUX-LARGE-NEXT: subq %rax, %rsp
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}
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