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Imported Upstream version 6.0.0.172
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external/llvm/test/CodeGen/AArch64/arm64-big-stack.ll
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external/llvm/test/CodeGen/AArch64/arm64-big-stack.ll
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; RUN: llc < %s | FileCheck %s
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target triple = "arm64-apple-macosx10"
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; Check that big stacks are generated correctly.
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; Currently, this is done by a sequence of sub instructions,
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; which can encode immediate with a 12 bits mask an optionally
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; shift left (up to 12). I.e., 16773120 is the biggest value.
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; <rdar://12513931>
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; CHECK-LABEL: foo:
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; CHECK: sub sp, sp, #4095, lsl #12
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; CHECK: sub sp, sp, #4095, lsl #12
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; CHECK: sub sp, sp, #2, lsl #12
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define void @foo() nounwind ssp {
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entry:
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%buffer = alloca [33554432 x i8], align 1
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%arraydecay = getelementptr inbounds [33554432 x i8], [33554432 x i8]* %buffer, i64 0, i64 0
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call void @doit(i8* %arraydecay) nounwind
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ret void
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}
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declare void @doit(i8*)
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