From 821adf9e5c962c97e46f3a215c876bc10916e302 Mon Sep 17 00:00:00 2001
From: lemon <lsof@mailbox.org>
Date: Fri, 21 Nov 2025 16:52:46 +0100
Subject: remove umul

---
 amd64/emit.c | 1 -
 amd64/isel.c | 5 ++---
 c/c.c        | 4 ++--
 ir/builder.c | 2 +-
 ir/fold.c    | 1 -
 ir/op.def    | 1 -
 6 files changed, 5 insertions(+), 9 deletions(-)

diff --git a/amd64/emit.c b/amd64/emit.c
index a7bf542..5a63a61 100644
--- a/amd64/emit.c
+++ b/amd64/emit.c
@@ -1041,7 +1041,6 @@ emitinstr(uchar **pcode, struct function *fn, struct block *blk, int curi, struc
       break;
    case Omul:
       if (kisint(cls))
-   case Oumul:
          Ximul(pcode, cls, reg2oper(ins->reg-1), ref2oper(ins->l), ref2oper(ins->r));
       else
          Xmulf(pcode, cls, reg2oper(ins->reg-1), ref2oper(ins->r));
diff --git a/amd64/isel.c b/amd64/isel.c
index b17e541..2ae9a92 100644
--- a/amd64/isel.c
+++ b/amd64/isel.c
@@ -15,7 +15,6 @@ static const uchar opflags[NOPER] = {
    [Oadd]  = ZF|CLOBF,
    [Osub]  = ZF|CLOBF,
    [Omul]  = CLOBF,
-   [Oumul] = CLOBF,
    [Odiv]  = CLOBF,
    [Oudiv] = CLOBF,
    [Orem]  = CLOBF,
@@ -457,7 +456,7 @@ sel(struct function *fn, struct instr *ins, struct block *blk, int *curi)
          }
       }
       /* fallthru */
-   case Omul: case Oumul:
+   case Omul:
    case Oand: case Oxor: case Oior:
       /* commutative ops */
       if (iscon(ins->l))
@@ -473,7 +472,7 @@ sel(struct function *fn, struct instr *ins, struct block *blk, int *curi)
    case Onot:
    ALU:
       if (!(op == Oadd && kisint(ins->cls))) /* 3-address add is lea */
-      if (!(in_range(op, Omul, Oumul) && kisint(ins->cls) && isimm32(ins->r))) /* for (I)MUL r,r/m,imm */
+      if (!(op == Omul && kisint(ins->cls) && isimm32(ins->r))) /* for (I)MUL r,r/m,imm */
          ins->inplace = 1;
       if (iscon(ins->l)) {
          fixarg(&ins->l, ins, blk, curi);
diff --git a/c/c.c b/c/c.c
index cc82950..5708419 100644
--- a/c/c.c
+++ b/c/c.c
@@ -3255,7 +3255,7 @@ compileexpr(struct function *fn, const struct expr *ex, bool discard)
    case EADDROF:
       return expraddr(fn, sub);
    case EMUL:
-      op = isunsigned(ex->ty) ? Oumul : Omul;
+      op = Omul;
       goto BinArith;
    case EDIV:
       op = isunsigned(ex->ty) ? Oudiv : Odiv;
@@ -3382,7 +3382,7 @@ compileexpr(struct function *fn, const struct expr *ex, bool discard)
       if (discard) return NOREF;
       return bitsiz ? narrow(fn, cls, sub[0].ty, q, bitsiz) : q;
    case ESETMUL:
-      op = isunsigned(ex->ty) ? Oumul : Omul;
+      op = Omul;
       goto Compound;
    case ESETDIV:
       op = isunsigned(ex->ty) ? Oudiv : Odiv;
diff --git a/ir/builder.c b/ir/builder.c
index 9c6a0ef..b177a39 100644
--- a/ir/builder.c
+++ b/ir/builder.c
@@ -18,7 +18,7 @@ irbinop(struct function *fn, enum op op, enum irclass k, union ref l, union ref
    case Osub:
       if (r.bits == ZEROREF.bits) return l; /* x +/- 0 ==> x */
       break;
-   case Omul: case Oumul:
+   case Omul:
       if (isnumcon(l)) rswap(l, r); /* put const in rhs */
       if (r.bits == ZEROREF.bits) /* x * 0 ==> 0 */
          return ZEROREF;
diff --git a/ir/fold.c b/ir/fold.c
index 751583e..b45aa38 100644
--- a/ir/fold.c
+++ b/ir/fold.c
@@ -27,7 +27,6 @@ foldint(enum op op, enum irclass k, union ref lr, union ref rr)
    case Oadd:  x = l.u + r.u; break;
    case Osub:  x = l.u - r.u; break;
    case Omul:  x = l.u * r.u; break;
-   case Oumul: x = l.u * r.u; break;
    case Odiv:  x = w ? l.s / r.s : (int)l.s / (int)r.s; break;
    case Oudiv: x = w ? l.u / r.u : (uint)l.u / (uint)r.u; break;
    case Orem:  x = w ? l.s % r.s : (int)l.s % (int)r.s; break;
diff --git a/ir/op.def b/ir/op.def
index b3d237c..947b1f0 100644
--- a/ir/op.def
+++ b/ir/op.def
@@ -23,7 +23,6 @@ _(extu32,    1)
 _(add,       2)
 _(sub,       2)
 _(mul,       2)
-_(umul,      2)
 _(div,       2)
 _(udiv,      2)
 _(rem,       2)
-- 
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