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235d88f303
* Closes #1614 * Implements the copy propagation transformation in JuvixReg and adds tests for it. * For this optimization to give any improvement, we need to run dead code elimination afterwards (#2827).
85 lines
1.6 KiB
Plaintext
85 lines
1.6 KiB
Plaintext
-- Copy & constant propagation
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type either {
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left : integer -> either;
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right : bool -> either;
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}
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function main() : * {
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tmp[0] = 7;
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tmp[1] = tmp[0];
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tmp[0] = tmp[1];
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tmp[2] = tmp[0];
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-- tmp[2] = 7
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tmp[1] = tmp[0];
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tmp[0] = add tmp[1] 1;
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tmp[2] = add tmp[2] tmp[1];
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-- tmp[2] = 14
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tmp[0] = 19;
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tmp[1] = tmp[0];
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tmp[0] = add tmp[1] 1;
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tmp[3] = add tmp[0] tmp[1];
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tmp[4] = tmp[3];
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tmp[2] = add tmp[4] tmp[2];
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-- tmp[2] = 53
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tmp[1] = eq tmp[2] 54;
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tmp[0] = 4;
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tmp[3] = 3;
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tmp[4] = tmp[0];
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tmp[5] = 4;
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tmp[6] = tmp[5];
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br tmp[1] {
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true: {
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tmp[4] = 7;
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};
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false: {
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tmp[3] = tmp[6];
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};
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};
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tmp[2] = add tmp[2] tmp[4];
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tmp[2] = add tmp[2] tmp[3];
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-- tmp[2] = 61
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tmp[0] = alloc left (3);
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tmp[1] = 17;
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tmp[3] = tmp[1];
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case[either] tmp[0] {
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left: {
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tmp[4] = tmp[0].left[0];
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tmp[1] = tmp[4];
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tmp[3] = tmp[1];
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};
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right: {
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nop;
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};
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};
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tmp[2] = add tmp[2] tmp[3];
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-- tmp[2] = 64
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tmp[0] = alloc right (true);
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tmp[1] = 17;
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tmp[3] = tmp[1];
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case[either] tmp[0] {
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left: {
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tmp[1] = tmp[0].left[0];
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};
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right: {
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br tmp[0].right[0] {
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true: {
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tmp[1] = add tmp[3] 1;
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};
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false: {
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nop;
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};
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};
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};
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};
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tmp[2] = add tmp[2] tmp[1];
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-- tmp[2] = 82
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ret tmp[2];
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}
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