2010-03-31-RedundantPHIs.ll
1.24 KB
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; RUN: opt < %s -basicaa -newgvn -S | FileCheck %s
; CHECK-NOT: load
; CHECK-NOT: phi
define i8* @cat(i8* %s1, ...) nounwind {
entry:
br i1 undef, label %bb, label %bb3
bb: ; preds = %entry
unreachable
bb3: ; preds = %entry
store i8* undef, i8** undef, align 4
br i1 undef, label %bb5, label %bb6
bb5: ; preds = %bb3
unreachable
bb6: ; preds = %bb3
br label %bb12
bb8: ; preds = %bb12
br i1 undef, label %bb9, label %bb10
bb9: ; preds = %bb8
%0 = load i8*, i8** undef, align 4 ; <i8*> [#uses=0]
%1 = load i8*, i8** undef, align 4 ; <i8*> [#uses=0]
br label %bb11
bb10: ; preds = %bb8
br label %bb11
bb11: ; preds = %bb10, %bb9
br label %bb12
bb12: ; preds = %bb11, %bb6
br i1 undef, label %bb8, label %bb13
bb13: ; preds = %bb12
ret i8* undef
}