27 lines
761 B
LLVM
27 lines
761 B
LLVM
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;; RUN: opt -S -codegenprepare < %s | FileCheck %s
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;; Ensure that codegenprepare (via InstSimplify) doesn't eliminate the
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;; phi here (which would cause a module verification error).
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;; CHECK: phi
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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declare void @foo(i32)
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define dso_local i32 @futex_lock_pi_atomic() local_unnamed_addr {
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entry:
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%0 = callbr i32 asm "", "=r,X,~{dirflag},~{fpsr},~{flags}"(i8* blockaddress(@futex_lock_pi_atomic, %b.exit))
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to label %asm.fallthrough.i [label %b.exit]
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asm.fallthrough.i:
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br label %b.exit
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b.exit:
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%g.0 = phi i32 [ %0, %asm.fallthrough.i ], [ undef, %entry ]
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tail call void @foo(i32 %g.0)
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ret i32 undef
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}
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