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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
20 lines
433 B
Plaintext
20 lines
433 B
Plaintext
// #target: macos-x64
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module testing;
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fn void start() @export("_start") @naked @nostrip {
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asm {
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movq $rax, 0x3c;
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movq $rdi, 42;
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syscall;
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}
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}
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/* #expect: testing.ll
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define void @_start() #0 {
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entry:
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call void asm sideeffect alignstack "movq $$60, %rax\0Amovq $$42, %rdi\0Asyscall \0A", "~{cc},~{rax},~{rcx},~{r8},~{r11},~{flags},~{dirflag},~{fspr}"()
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ret void
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}
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