3dd8c9176b
MSSA-based LICM has been enabled by default for a few years now. This drops the old AST-based implementation. Using loop(licm) will result in a fatal error, the use of loop-mssa(licm) is required (or just licm, which defaults to loop-mssa). Note that the core canSinkOrHoistInst() logic has to retain AST support for now, because it is shared with LoopSink. Differential Revision: https://reviews.llvm.org/D108244
17 lines
544 B
LLVM
17 lines
544 B
LLVM
; RUN: opt < %s -licm | llvm-dis
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; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop-mssa(licm)' < %s | llvm-dis
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define void @testfunc(i32 %i) {
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; <label>:0
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br label %Loop
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Loop: ; preds = %Loop, %0
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%j = phi i32 [ 0, %0 ], [ %Next, %Loop ] ; <i32> [#uses=1]
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%i2 = mul i32 %i, 17 ; <i32> [#uses=1]
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%Next = add i32 %j, %i2 ; <i32> [#uses=2]
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%cond = icmp eq i32 %Next, 0 ; <i1> [#uses=1]
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br i1 %cond, label %Out, label %Loop
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Out: ; preds = %Loop
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ret void
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}
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