38 lines
1.3 KiB
LLVM
38 lines
1.3 KiB
LLVM
; RUN: llc -mtriple x86_64-apple-macosx10.8.0 < %s 2>&1 >/dev/null | FileCheck %s
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; Check the internal option that warns when the stack frame size exceeds the
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; given amount.
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; <rdar://13987214>
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; CHECK-NOT: nowarn
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define void @nowarn() nounwind ssp "warn-stack-size"="80" {
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entry:
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%buffer = alloca [12 x i8], align 1
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call void @doit(ptr %buffer) nounwind
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ret void
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}
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; CHECK: warning: <unknown>:0:0: stack frame size ([[STCK:[0-9]+]]) exceeds limit (80) in function 'warn'
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define void @warn() nounwind ssp "warn-stack-size"="80" {
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entry:
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%buffer = alloca [80 x i8], align 1
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call void @doit(ptr %buffer) nounwind
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ret void
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}
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; Ensure that warn-stack-size also considers the size of the unsafe stack.
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; With safestack enabled the machine stack size is well below 80, but the
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; combined stack size of the machine stack and unsafe stack will exceed the
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; warning threshold
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; CHECK: warning: <unknown>:0:0: stack frame size ([[STCK:[0-9]+]]) exceeds limit (80) in function 'warn_safestack'
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define i32 @warn_safestack() nounwind ssp safestack "warn-stack-size"="80" {
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entry:
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%var = alloca i32, align 4
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%buffer = alloca [80 x i8], align 1
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call void @doit(ptr %buffer) nounwind
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call void @doit(ptr %var) nounwind
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%val = load i32, ptr %var
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ret i32 %val
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}
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declare void @doit(ptr)
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