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asm: correctly handle flags in the CFG

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gingerBill
2026-08-24 22:56:49 +01:00
parent 477fd7467b
commit 032566714c
6 changed files with 175 additions and 55 deletions
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5
src/check_asm.cpp
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@@ -1630,7 +1630,8 @@ gb_internal void check_mnemonic(AsmCtx *asm_ctx, CheckerContext *ctx, Entity *tm
explicit_writes |= synth;
}
facts->gen_regs = produced | pinned_param_writes;
facts->gen_regs = produced | pinned_param_writes;
facts->gen_flags = cast(u16)clobber.flags_wr;
// NOTE(bill): mnemonics such as `xor r, r` / `sub r, r` act as zeroing the destination
// independent of its prior value: the read is architecturally dead, so it must not count as a use.
@@ -2715,7 +2716,7 @@ gb_internal void check_asm_template_from_entity(CheckerContext *c, Entity *e, De
if (build_context.metrics.arch == TargetArch_amd64) {
check_asm_template(&g_asm_amd64, c, e, d);
} else if (build_context.metrics.arch == TargetArch_riscv64) {
check_asm_template(&g_asm_riscv, c, e, d);
// check_asm_template(&g_asm_riscv, c, e, d);
} else {
error(e->token, "asm templates are not currently supported for this target");
}