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https://github.com/c64scene-ar/llvm-6502.git
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29 lines
1.2 KiB
LLVM
29 lines
1.2 KiB
LLVM
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; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep mul | wc -l | grep 1
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; LSR should not make two copies of the Q*L expression in the preheader!
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sbyte %test(sbyte* %A, sbyte* %B, int %L, int %Q, int %N) {
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entry:
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%tmp.6 = mul int %Q, %L ; <int> [#uses=1]
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%N = cast int %N to uint ; <uint> [#uses=1]
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br label %no_exit
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no_exit: ; preds = %no_exit, %no_exit.preheader
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%indvar = phi uint [ 0, %entry], [ %indvar.next, %no_exit ] ; <uint> [#uses=2]
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%Sum.0.0 = phi sbyte [ 0, %entry], [ %tmp.21, %no_exit ] ; <sbyte> [#uses=1]
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%indvar = cast uint %indvar to int ; <int> [#uses=1]
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%N_addr.0.0 = sub int %N, %indvar ; <int> [#uses=1]
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%tmp.8 = add int %N_addr.0.0, %tmp.6 ; <int> [#uses=2]
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%tmp.9 = getelementptr sbyte* %A, int %tmp.8 ; <sbyte*> [#uses=1]
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%tmp.10 = load sbyte* %tmp.9 ; <sbyte> [#uses=1]
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%tmp.17 = getelementptr sbyte* %B, int %tmp.8 ; <sbyte*> [#uses=1]
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%tmp.18 = load sbyte* %tmp.17 ; <sbyte> [#uses=1]
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%tmp.19 = sub sbyte %tmp.10, %tmp.18 ; <sbyte> [#uses=1]
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%tmp.21 = add sbyte %tmp.19, %Sum.0.0 ; <sbyte> [#uses=2]
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%indvar.next = add uint %indvar, 1 ; <uint> [#uses=2]
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%exitcond = seteq uint %indvar.next, %N ; <bool> [#uses=1]
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br bool %exitcond, label %loopexit, label %no_exit
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loopexit:
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ret sbyte %tmp.21
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}
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