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https://github.com/c64scene-ar/llvm-6502.git
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49 lines
1.2 KiB
LLVM
49 lines
1.2 KiB
LLVM
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; This code snippet is derived from the following "whetstone" style code:
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; int whet(int j) {
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; if (j == 1) j = 2;
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; else j = 7;
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; if (j > 2) j = 0;
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; else j = 3;
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; if (j < 1) j = 10;
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; else j = 0;
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; return j;
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;}
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;
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; This should eliminate all BB's except BB0, BB9, BB10
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;
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; RUN: if as < %s | opt -cee -instcombine -simplifycfg | dis | grep 'bb[2-8]'
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; RUN: then exit 1
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; RUN: else exit 0
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; RUN: fi
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implementation ; Functions:
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int %whet(int %j) {
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bb0: ; No predecessors!
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%cond220 = setne int %j, 1 ; <bool> [#uses=1]
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br bool %cond220, label %bb3, label %bb4
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bb3: ; preds = %bb0
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br label %bb4
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bb4: ; preds = %bb3, %bb0
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%reg111 = phi int [ 7, %bb3 ], [ 2, %bb0 ] ; <int> [#uses=1]
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%cond222 = setle int %reg111, 2 ; <bool> [#uses=1]
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br bool %cond222, label %bb6, label %bb7
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bb6: ; preds = %bb4
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br label %bb7
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bb7: ; preds = %bb6, %bb4
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%reg114 = phi int [ 3, %bb6 ], [ 0, %bb4 ] ; <int> [#uses=1]
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%cond225 = setgt int %reg114, 0 ; <bool> [#uses=1]
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br bool %cond225, label %bb9, label %bb10
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bb9: ; preds = %bb7
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br label %bb10
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bb10: ; preds = %bb9, %bb7
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%reg117 = phi int [ 0, %bb9 ], [ 10, %bb7 ] ; <int> [#uses=1]
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ret int %reg117
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}
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