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cgen: materialise str-def operands in streq pushes

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A str `def` has no name(SB) header; the streq push arms read a frame
slot that does not exist. Load the literal through cgexpr (AX=ptr,
BX=len) instead. Both stages.
This commit is contained in:
Hojun-Cho
2026-08-07 22:59:47 +09:00
parent 0bb1f86c14
commit c654e97db1
3 changed files with 38 additions and 0 deletions
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10
cmd/w6c/cgen.c
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@@ -4925,6 +4925,12 @@ cgexpr(Cg *c, Node *n, Local *locals)
ins1(c, A_PUSHQ, areg(D_AX));
ins2(c, A_MOVQ, amem(D_BX, 0), areg(D_AX));
ins1(c, A_PUSHQ, areg(D_AX));
} else if (off == 0 && def_isanydef(n->rhs->str)) {
/* A str `def` has no name(SB) header: cgexpr
* materialises its literal as AX=ptr, BX=len. */
cgexpr(c, n->rhs, locals);
ins1(c, A_PUSHQ, areg(D_BX));
ins1(c, A_PUSHQ, areg(D_AX));
} else {
ins2(c, A_MOVQ, amem(D_BP, off + 8), areg(D_AX));
ins1(c, A_PUSHQ, areg(D_AX));
@@ -4948,6 +4954,10 @@ cgexpr(Cg *c, Node *n, Local *locals)
ins1(c, A_PUSHQ, areg(D_AX));
ins2(c, A_MOVQ, amem(D_BX, 0), areg(D_AX));
ins1(c, A_PUSHQ, areg(D_AX));
} else if (off == 0 && def_isanydef(n->lhs->str)) {
cgexpr(c, n->lhs, locals);
ins1(c, A_PUSHQ, areg(D_BX));
ins1(c, A_PUSHQ, areg(D_AX));
} else {
ins2(c, A_MOVQ, amem(D_BP, off + 8), areg(D_AX));
ins1(c, A_PUSHQ, areg(D_AX));