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Imported Upstream version 6.0.0.172

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Former-commit-id: f3cc9b82f3e5bd8f0fd3ebc098f789556b44e9cd
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Xamarin Public Jenkins (auto-signing)
2019-04-12 14:10:50 +00:00
parent 8016999e4d
commit 64ac736ec5
32155 changed files with 3981439 additions and 75368 deletions
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28
external/llvm/test/CodeGen/X86/stackmap-shadow-optimization.ll vendored Normal file
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; RUN: llc < %s -mtriple=x86_64-apple-darwin -mcpu=corei7 | FileCheck %s
; Check that the X86 stackmap shadow optimization is only outputting a 3-byte
; nop here. 8-bytes are requested, but 5 are covered by the code for the call to
; bar. However, the frame teardown and the return do not count towards the
; stackmap shadow as the call return counts as a branch target so must flush
; the shadow.
; Note that in order for a thread to not return in to the patched space
; the call must be at the end of the shadow, so the required nop must be
; before the call, not after.
define void @shadow_optimization_test() {
entry:
; CHECK-LABEL: shadow_optimization_test:
; CHECK: callq _bar
; CHECK: nop
; CHECK: callq _bar
; CHECK-NOT: nop
; CHECK: callq _bar
; CHECK-NOT: nop
call void @bar()
tail call void (i64, i32, ...) @llvm.experimental.stackmap(i64 0, i32 8)
call void @bar()
call void @bar()
ret void
}
declare void @llvm.experimental.stackmap(i64, i32, ...)
declare void @bar()