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76fa404b89
* fix(asm): consider asm blocks as volatile When asm blocks are not marked as volatile, they may be (wrongly) discarded by LLVM optimization passes. * fix(asm): mark syscall as clobbering return register The `syscall` instruction returns the system call result in the `rax` register. * feat(asm): add push instructions. * feat(asm): add pop instructions
45 lines
879 B
Plaintext
45 lines
879 B
Plaintext
// #target: macos-x64
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module test;
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fn void main(String[] args)
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{
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int x;
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if (args.len < 10) return;
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asm
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{
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in $eax, 3;
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in $ax, $dx;
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incb $al;
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incw $bx;
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incl $eax;
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incq $rax;
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incl [&x];
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insb;
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insw;
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insl;
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int 0x08;
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int3;
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// int1; Broken in LLVM
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invd;
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invlpg [&x];
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invpcid $rax, [&x];
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invlpga $ecx, $rax;
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iret;
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iretl;
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iretw;
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iretq;
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push 1;
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pushw 2;
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pushw $ax;
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pushw [&x];
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pushq $rax;
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pushq [&x];
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popw $ax;
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popq $rax;
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}
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}
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/* #expect: test.ll
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"in $$3, %eax\0Ain %dx, %ax\0Aincb %al\0Aincw %bx\0Aincl %eax\0Aincq %rax\0Aincl $0\0Ainsb \0Ainsw \0Ainsl \0Aint $$8\0Aint3 \0Ainvd \0Ainvlpg $0\0Ainvpcid $1, %rax\0Ainvlpga %rax, %ecx\0Airet \0Airetl \0Airetw \0Airetq \0Apush $$1\0Apushw $$2\0Apushw %ax\0Apushw $1\0Apushq %rax\0Apushq $1\0Apopw %ax\0Apopq %rax\0A", "=*&m,*m,~{cc},~{rax},~{rbx},~{flags},~{dirflag},~{fspr}"
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