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Diffstat (limited to 'test/CodeGen/X86/stack-probes.ll')
| -rw-r--r-- | test/CodeGen/X86/stack-probes.ll | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/test/CodeGen/X86/stack-probes.ll b/test/CodeGen/X86/stack-probes.ll new file mode 100644 index 000000000000..861a975f6cb7 --- /dev/null +++ b/test/CodeGen/X86/stack-probes.ll @@ -0,0 +1,29 @@ +; RUN: llc -mtriple=i386-pc-linux-gnu < %s -o - | FileCheck --check-prefix=X86-LINUX %s +; RUN: llc -mtriple=x86_64-pc-linux-gnu < %s -o - | FileCheck --check-prefix=X64-LINUX %s +; RUN: llc -mtriple=x86_64-pc-linux-gnu -code-model=large < %s -o - | FileCheck --check-prefix=X64-LINUX-LARGE %s + +declare void @use([40096 x i8]*) + +; Ensure calls to __probestack occur for large stack frames +define void @test() "probe-stack"="__probestack" { + %array = alloca [40096 x i8], align 16 + call void @use([40096 x i8]* %array) + ret void + +; X86-LINUX-LABEL: test: +; X86-LINUX: movl $40124, %eax # imm = 0x9CBC +; X86-LINUX-NEXT: calll __probestack +; X86-LINUX-NEXT: subl %eax, %esp + +; X64-LINUX-LABEL: test: +; X64-LINUX: movl $40104, %eax # imm = 0x9CA8 +; X64-LINUX-NEXT: callq __probestack +; X64-LINUX-NEXT: subq %rax, %rsp + +; X64-LINUX-LARGE-LABEL: test: +; X64-LINUX-LARGE: movl $40104, %eax # imm = 0x9CA8 +; X64-LINUX-LARGE-NEXT: movabsq $__probestack, %r11 +; X64-LINUX-LARGE-NEXT: callq *%r11 +; X64-LINUX-LARGE-NEXT: subq %rax, %rsp + +} |