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; Test a bunch of cases where the cfg simplification code should
; be able to fold PHI nodes into computation in common cases. Folding the PHI
; nodes away allows the branches to be eliminated, performing a simple form of
; 'if conversion'.
; RUN: llvm-as < %s | opt -simplifycfg | llvm-dis > %t.xform
; RUN: not grep phi %t.xform && grep ret %t.xform
declare void %use(bool)
declare void %use(int)
void %test2(bool %c, bool %d, int %V, int %V2) {
br bool %d, label %X, label %F
X:
br bool %c, label %T, label %F
T:
br label %F
F:
%B1 = phi bool [true, %0], [false, %T], [false, %X]
%I7 = phi int [%V, %0], [%V2, %T], [%V2, %X]
call void %use(bool %B1)
call void %use(int %I7)
ret void
}
void %test(bool %c, int %V, int %V2) {
br bool %c, label %T, label %F
T:
br label %F
F:
%B1 = phi bool [true, %0], [false, %T]
%I6 = phi int [%V, %0], [0, %T]
call void %use(bool %B1)
call void %use(int %I6)
ret void
}
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