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5dd784a8ca
select instruction git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@12546 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
1.0 KiB
LLVM
37 lines
1.0 KiB
LLVM
; Test a bunch of cases where the cfg simplification code should
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; be able to fold PHI nodes into computation in common cases. Folding the PHI
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; nodes away allows the branches to be eliminated, performing a simple form of
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; 'if conversion'.
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; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis > %t.xform
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; RUN: not grep phi %t.xform && grep ret %t.xform
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declare void %use(bool)
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declare void %use(int)
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void %test(bool %c, int %V, int %V2) {
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br bool %c, label %T, label %F
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T:
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br label %F
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F:
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%B1 = phi bool [true, %0], [false, %T]
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%B2 = phi bool [true, %T], [false, %0]
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%I1 = phi int [1, %T], [0, %0]
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%I2 = phi int [1, %0], [0, %T]
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%I3 = phi int [17, %T], [0, %0]
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%I4 = phi int [17, %T], [5, %0]
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%I5 = phi int [%V, %T], [0, %0]
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%I6 = phi int [%V, %0], [0, %T]
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%I7 = phi int [%V, %0], [%V2, %T]
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call void %use(bool %B1)
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call void %use(bool %B2)
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call void %use(int %I1)
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call void %use(int %I2)
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call void %use(int %I3)
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call void %use(int %I4)
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call void %use(int %I5)
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call void %use(int %I6)
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ret void
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}
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