3fa07dee94
This reverts r370525 (git commit 0bb1630685fba255fa93def92603f064c2ffd203) Also reverts r370543 (git commit 185ddc08eed6542781040b8499ef7ad15c8ae9f4) The approach I took only works for functions marked `noreturn`. In general, a call that is not known to be noreturn may be followed by unreachable for other reasons. For example, there could be multiple call sites to a function that throws sometimes, and at some call sites, it is known to always throw, so it is followed by unreachable. We need to insert an `int3` in these cases to pacify the Windows unwinder. I think this probably deserves its own standalone, Win64-only fixup pass that runs after block placement. Implementing that will take some time, so let's revert to TrapUnreachable in the mean time. llvm-svn: 370829
23 lines
693 B
LLVM
23 lines
693 B
LLVM
; RUN: llc < %s -mtriple=i686-pc-win32 | FileCheck -check-prefix=CHECK -check-prefix=WIN32 %s
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; RUN: llc < %s -mtriple=x86_64-pc-win32 | FileCheck -check-prefix=CHECK -check-prefix=WIN64 %s
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; RUN: llc < %s -mtriple=i386-linux-gnu | FileCheck -check-prefix=LINUX %s
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target datalayout = "e-m:x-p:32:32-i64:64-f80:32-n8:16:32-a:0:32-S32"
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target triple = "i686-pc-windows-msvc18.0.0"
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; Don't emit empty functions on Windows; it can lead to duplicate entries
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; (multiple functions sharing the same RVA) in the Guard CF Function Table which
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; the kernel refuses to load.
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define void @f() {
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entry:
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unreachable
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; CHECK-LABEL: f:
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; WIN32: nop
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; WIN64: ud2
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; LINUX-NOT: nop
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; LINUX-NOT: ud2
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}
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