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https://github.com/c64scene-ar/llvm-6502.git
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e6d5d39c07
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@48538 91177308-0d34-0410-b5e6-96231b3b80d8
28 lines
1.2 KiB
LLVM
28 lines
1.2 KiB
LLVM
; RUN: llvm-as < %s | opt -loop-reduce | llvm-dis | grep mul | count 1
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; LSR should not make two copies of the Q*L expression in the preheader!
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define i8 @test(i8* %A, i8* %B, i32 %L, i32 %Q, i32 %N.s) {
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entry:
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%tmp.6 = mul i32 %Q, %L ; <i32> [#uses=1]
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%N = bitcast i32 %N.s to i32 ; <i32> [#uses=1]
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br label %no_exit
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no_exit: ; preds = %no_exit, %entry
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%indvar.ui = phi i32 [ 0, %entry ], [ %indvar.next, %no_exit ] ; <i32> [#uses=2]
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%Sum.0.0 = phi i8 [ 0, %entry ], [ %tmp.21, %no_exit ] ; <i8> [#uses=1]
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%indvar = bitcast i32 %indvar.ui to i32 ; <i32> [#uses=1]
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%N_addr.0.0 = sub i32 %N.s, %indvar ; <i32> [#uses=1]
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%tmp.8 = add i32 %N_addr.0.0, %tmp.6 ; <i32> [#uses=2]
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%tmp.9 = getelementptr i8* %A, i32 %tmp.8 ; <i8*> [#uses=1]
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%tmp.10 = load i8* %tmp.9 ; <i8> [#uses=1]
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%tmp.17 = getelementptr i8* %B, i32 %tmp.8 ; <i8*> [#uses=1]
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%tmp.18 = load i8* %tmp.17 ; <i8> [#uses=1]
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%tmp.19 = sub i8 %tmp.10, %tmp.18 ; <i8> [#uses=1]
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%tmp.21 = add i8 %tmp.19, %Sum.0.0 ; <i8> [#uses=2]
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%indvar.next = add i32 %indvar.ui, 1 ; <i32> [#uses=2]
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%exitcond = icmp eq i32 %indvar.next, %N ; <i1> [#uses=1]
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br i1 %exitcond, label %loopexit, label %no_exit
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loopexit: ; preds = %no_exit
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ret i8 %tmp.21
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}
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