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https://github.com/c64scene-ar/llvm-6502.git
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36e12073df
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24099 91177308-0d34-0410-b5e6-96231b3b80d8
58 lines
2.4 KiB
LLVM
58 lines
2.4 KiB
LLVM
; RUN: llvm-as < %s | opt -loop-reduce &&
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; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | not grep mul
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; Make sure we don't get a multiply by 6 in this loop.
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int %foo(int %A, int %B, int %C, int %D) {
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entry:
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%tmp.5 = setgt int %C, 0 ; <bool> [#uses=1]
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%tmp.25 = and int %A, 1 ; <int> [#uses=1]
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br label %loopentry.1
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loopentry.1: ; preds = %loopexit.1, %entry
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%indvar20 = phi uint [ 0, %entry ], [ %indvar.next21, %loopexit.1 ] ; <uint> [#uses=2]
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%k.1 = phi int [ 0, %entry ], [ %k.1.3, %loopexit.1 ] ; <int> [#uses=2]
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br bool %tmp.5, label %no_exit.1.preheader, label %loopexit.1
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no_exit.1.preheader: ; preds = %loopentry.1
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%i.0.0 = cast uint %indvar20 to int ; <int> [#uses=1]
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%tmp.9 = mul int %i.0.0, 6 ; <int> [#uses=1]
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br label %no_exit.1.outer
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no_exit.1.outer: ; preds = %cond_true, %no_exit.1.preheader
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%k.1.2.ph = phi int [ %k.1, %no_exit.1.preheader ], [ %k.09, %cond_true ] ; <int> [#uses=2]
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%j.1.2.ph = phi int [ 0, %no_exit.1.preheader ], [ %inc.1, %cond_true ] ; <int> [#uses=1]
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br label %no_exit.1
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no_exit.1: ; preds = %cond_continue, %no_exit.1.outer
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%indvar = phi uint [ 0, %no_exit.1.outer ], [ %indvar.next, %cond_continue ] ; <uint> [#uses=2]
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%indvar = cast uint %indvar to int ; <int> [#uses=1]
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%j.1.2 = add int %indvar, %j.1.2.ph ; <int> [#uses=2]
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%tmp.11 = add int %j.1.2, %tmp.9 ; <int> [#uses=1]
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%tmp.12 = cast int %tmp.11 to ubyte ; <ubyte> [#uses=1]
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%tmp.13 = shl int %D, ubyte %tmp.12 ; <int> [#uses=2]
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%tmp.15 = seteq int %tmp.13, %B ; <bool> [#uses=1]
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%inc.1 = add int %j.1.2, 1 ; <int> [#uses=3]
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br bool %tmp.15, label %cond_true, label %cond_continue
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cond_true: ; preds = %no_exit.1
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%tmp.26 = and int %tmp.25, %tmp.13 ; <int> [#uses=1]
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%k.09 = add int %tmp.26, %k.1.2.ph ; <int> [#uses=2]
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%tmp.517 = setlt int %inc.1, %C ; <bool> [#uses=1]
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br bool %tmp.517, label %no_exit.1.outer, label %loopexit.1
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cond_continue: ; preds = %no_exit.1
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%tmp.519 = setlt int %inc.1, %C ; <bool> [#uses=1]
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%indvar.next = add uint %indvar, 1 ; <uint> [#uses=1]
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br bool %tmp.519, label %no_exit.1, label %loopexit.1
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loopexit.1: ; preds = %cond_continue, %cond_true, %loopentry.1
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%k.1.3 = phi int [ %k.1, %loopentry.1 ], [ %k.09, %cond_true ], [ %k.1.2.ph, %cond_continue ] ; <int> [#uses=2]
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%indvar.next21 = add uint %indvar20, 1 ; <uint> [#uses=2]
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%exitcond = seteq uint %indvar.next21, 4 ; <bool> [#uses=1]
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br bool %exitcond, label %loopexit.0, label %loopentry.1
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loopexit.0: ; preds = %loopexit.1
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ret int %k.1.3
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}
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