| 1 | // A contrived example to test the double jump removal peephole. |
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| 2 | |
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| 3 | extern "C" unsigned long bar(unsigned long count) { |
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| 4 | return count + 1; |
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| 5 | } |
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| 6 | |
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| 7 | unsigned long foo(unsigned long count) { |
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| 8 | asm( |
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| 9 | " cmpq $1,%0\n" |
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| 10 | " je .L7\n" |
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| 11 | " incq %0\n" |
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| 12 | " jmp .L1\n" |
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| 13 | ".L1: jmp .L2\n" |
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| 14 | ".L2: incq %0\n" |
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| 15 | " cmpq $2,%0\n" |
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| 16 | " jne .L3\n" |
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| 17 | " jmp .L4\n" |
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| 18 | ".L3: jmp .L5\n" |
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| 19 | ".L5: incq %0\n" |
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| 20 | ".L4: movq %0,%%rdi\n" |
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| 21 | " pop %%rbp\n" |
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| 22 | " jmp .L6\n" |
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| 23 | ".L7: pop %%rbp\n" |
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| 24 | " incq %0\n" |
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| 25 | " jmp .L6\n" |
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| 26 | ".L6: jmp bar\n" |
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| 27 | : |
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| 28 | : "m" (count) |
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| 29 | ); |
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| 30 | return count; |
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| 31 | } |
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| 32 | |
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| 33 | int main(int argc, const char* argv[]) { |
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| 34 | return foo(count: 38); |
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| 35 | } |
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| 36 | |
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