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reapply 86289, 86278, 86270, 86267, 86266 & 86264 plus a fix

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(making pred factoring only happen if threading is guaranteed
to be successful).

This now survives an X86-64 bootstrap of llvm-gcc.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86355 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2009-11-07 08:05:03 +00:00
parent e880efe446
commit 5729d38c81
3 changed files with 416 additions and 243 deletions
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22
test/Transforms/JumpThreading/crash.ll
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@ -170,3 +170,25 @@ bb32.i:
ret i32 1
}
define fastcc void @test5(i1 %tmp, i32 %tmp1) nounwind ssp {
entry:
br i1 %tmp, label %bb12, label %bb13
bb12:
br label %bb13
bb13:
%.lcssa31 = phi i32 [ undef, %bb12 ], [ %tmp1, %entry ]
%A = and i1 undef, undef
br i1 %A, label %bb15, label %bb61
bb15:
ret void
bb61:
ret void
}