39 lines
1.1 KiB
LLVM
39 lines
1.1 KiB
LLVM
; RUN: llc < %s -mtriple=x86_64-apple-macosx | FileCheck %s
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; This is supposed to be testing BranchFolding's common
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; code hoisting logic, but has been erroneously passing due
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; to there being a redundant xorl in the entry block
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; and no common code to hoist.
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; However, now that MachineSink sinks the redundant xor
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; hoist-common looks at it and rejects it for hoisting,
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; which causes this test to fail.
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; Since it seems this test is broken, marking XFAIL for now
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; until someone decides to remove it or fix what it tests.
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; XFAIL: *
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; Common "xorb al, al" instruction in the two successor blocks should be
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; moved to the entry block above the test + je.
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; rdar://9145558
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define zeroext i1 @t(i32 %c) nounwind ssp {
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entry:
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; CHECK-LABEL: t:
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; CHECK: xorl %eax, %eax
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; CHECK: test
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; CHECK: je
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%tobool = icmp eq i32 %c, 0
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br i1 %tobool, label %return, label %if.then
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if.then:
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; CHECK: callq
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%call = tail call zeroext i1 (...) @foo() nounwind
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br label %return
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return:
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; CHECK: ret
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%retval.0 = phi i1 [ %call, %if.then ], [ false, %entry ]
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ret i1 %retval.0
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}
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declare zeroext i1 @foo(...)
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