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https://github.com/c64scene-ar/llvm-6502.git
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offload the work to hasConstantValue rather than do something more complicated (such handling mutually recursive phis) because (1) it is not clear it is worth it; and (2) if it is worth it, maybe such logic would be better placed in hasConstantValue. Adjust some GVN tests which are now cleaned up much further (eg: all phi nodes are removed). git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@119043 91177308-0d34-0410-b5e6-96231b3b80d8
34 lines
798 B
LLVM
34 lines
798 B
LLVM
; RUN: opt < %s -basicaa -gvn -S | FileCheck %s
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@last = external global [65 x i32*]
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define i32 @NextRootMove(i32 %wtm) {
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entry:
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%tmp17618 = load i32** getelementptr ([65 x i32*]* @last, i32 0, i32 1), align 4
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; CHECK: entry:
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; CHECK-NEXT: %tmp17618 = load
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; CHECK-NOT: load
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; CHECK-NOT: phi
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br label %cond_true116
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cond_true116:
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br i1 false, label %cond_true128, label %cond_true145
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cond_true128:
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%tmp17625 = load i32** getelementptr ([65 x i32*]* @last, i32 0, i32 1), align 4
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br i1 false, label %bb98.backedge, label %return.loopexit
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bb98.backedge:
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br label %cond_true116
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cond_true145:
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%tmp17631 = load i32** getelementptr ([65 x i32*]* @last, i32 0, i32 1), align 4
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br i1 false, label %bb98.backedge, label %return.loopexit
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return.loopexit:
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br label %return
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return:
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ret i32 0
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}
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