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Diffstat (limited to 'src/mesa/shader/slang/slang_codegen.c')
-rw-r--r--src/mesa/shader/slang/slang_codegen.c106
1 files changed, 46 insertions, 60 deletions
diff --git a/src/mesa/shader/slang/slang_codegen.c b/src/mesa/shader/slang/slang_codegen.c
index bd7b30cd13a..6671f31c478 100644
--- a/src/mesa/shader/slang/slang_codegen.c
+++ b/src/mesa/shader/slang/slang_codegen.c
@@ -617,6 +617,21 @@ new_break(slang_ir_node *loopNode)
static slang_ir_node *
+new_break_if_false(slang_ir_node *loopNode, slang_ir_node *cond)
+{
+ slang_ir_node *n = new_node1(IR_BREAK_IF_FALSE, cond);
+ assert(loopNode);
+ assert(loopNode->Opcode == IR_LOOP);
+ if (n) {
+ /* insert this node at head of linked list */
+ n->BranchNode = loopNode->BranchNode;
+ loopNode->BranchNode = n;
+ }
+ return n;
+}
+
+
+static slang_ir_node *
new_cont(slang_ir_node *loopNode)
{
slang_ir_node *n = new_node0(IR_CONT);
@@ -632,6 +647,14 @@ new_cont(slang_ir_node *loopNode)
static slang_ir_node *
+new_cond(slang_ir_node *n)
+{
+ slang_ir_node *c = new_node1(IR_COND, n);
+ return c;
+}
+
+
+static slang_ir_node *
new_if(slang_ir_node *cond, slang_ir_node *ifPart, slang_ir_node *elsePart)
{
return new_node3(IR_IF, cond, ifPart, elsePart);
@@ -1290,14 +1313,6 @@ _slang_is_noop(const slang_operation *oper)
}
-static slang_ir_node *
-_slang_gen_cond(slang_ir_node *n)
-{
- slang_ir_node *c = new_node1(IR_COND, n);
- return c;
-}
-
-
static void
print_funcs(struct slang_function_scope_ *scope, const char *name)
{
@@ -1381,12 +1396,10 @@ _slang_gen_while(slang_assemble_ctx * A, const slang_operation *oper)
slang_ir_node *prevLoop;
/*
* LOOP:
- * eval expr (child[0]), updating condcodes
- * IF !expr:
- * BRK
+ * BREAK if !expr (child[0])
* body code (child[1])
*/
- slang_ir_node *ifThen, *cond, *body, *loop;
+ slang_ir_node *loop, *cond, *breakIf, *body;
loop = new_loop(NULL);
@@ -1395,19 +1408,12 @@ _slang_gen_while(slang_assemble_ctx * A, const slang_operation *oper)
A->CurLoop = loop;
cond = _slang_gen_operation(A, &oper->children[0]);
- cond = new_node1(IR_NOT, cond);
- cond = _slang_gen_cond(cond);
-
- ifThen = new_if(cond,
- new_break(A->CurLoop),
- NULL);
-
+ breakIf = new_break_if_false(A->CurLoop, cond);
body = _slang_gen_operation(A, &oper->children[1]);
+ loop->Children[0] = new_seq(breakIf, body);
- loop->Children[0] = new_seq(ifThen, body);
-
-
- A->CurLoop = prevLoop; /* pop loop, restore prev */
+ /* pop loop, restore prev */
+ A->CurLoop = prevLoop;
return loop;
}
@@ -1423,11 +1429,9 @@ _slang_gen_do(slang_assemble_ctx * A, const slang_operation *oper)
/*
* LOOP:
* body code (child[0])
- * eval expr (child[1]), updating condcodes
- * IF !expr:
- * BRK
+ * BREAK if !expr (child[1])
*/
- slang_ir_node *ifThen, *cond, *body, *loop;
+ slang_ir_node *loop, *cond, *breakIf, *body;
loop = new_loop(NULL);
@@ -1436,18 +1440,12 @@ _slang_gen_do(slang_assemble_ctx * A, const slang_operation *oper)
A->CurLoop = loop;
body = _slang_gen_operation(A, &oper->children[0]);
-
cond = _slang_gen_operation(A, &oper->children[1]);
- cond = new_node1(IR_NOT, cond);
- cond = _slang_gen_cond(cond);
+ breakIf = new_break_if_false(A->CurLoop, cond);
+ loop->Children[0] = new_seq(body, breakIf);
- ifThen = new_if(cond,
- new_break(A->CurLoop),
- NULL);
-
- loop->Children[0] = new_seq(body, ifThen);
-
- A->CurLoop = prevLoop; /* pop loop, restore prev */
+ /* pop loop, restore prev */
+ A->CurLoop = prevLoop;
return loop;
}
@@ -1463,13 +1461,11 @@ _slang_gen_for(slang_assemble_ctx * A, const slang_operation *oper)
/*
* init (child[0])
* LOOP:
- * eval expr (child[1]), updating condcodes
- * IF !expr:
- * BRK
+ * BREAK if !expr (child[1])
* body code (child[3])
* incr code (child[2]) // XXX continue here
*/
- slang_ir_node *init, *ifThen, *cond, *body, *loop, *incr;
+ slang_ir_node *loop, *cond, *breakIf, *body, *init, *incr;
init = _slang_gen_operation(A, &oper->children[0]);
loop = new_loop(NULL);
@@ -1479,21 +1475,14 @@ _slang_gen_for(slang_assemble_ctx * A, const slang_operation *oper)
A->CurLoop = loop;
cond = _slang_gen_operation(A, &oper->children[1]);
- cond = new_node1(IR_NOT, cond);
- cond = _slang_gen_cond(cond);
-
- ifThen = new_if(cond,
- new_break(A->CurLoop),
- NULL);
-
+ breakIf = new_break_if_false(A->CurLoop, cond);
body = _slang_gen_operation(A, &oper->children[3]);
-
incr = _slang_gen_operation(A, &oper->children[2]);
+ loop->Children[0] = new_seq(breakIf,
+ new_seq(body, incr));
- loop->Children[0] = new_seq(ifThen,
- new_seq(body,incr));
-
- A->CurLoop = prevLoop; /* pop loop, restore prev */
+ /* pop loop, restore prev */
+ A->CurLoop = prevLoop;
return new_seq(init, loop);
}
@@ -1521,7 +1510,7 @@ _slang_gen_if(slang_assemble_ctx * A, const slang_operation *oper)
slang_atom endifAtom = slang_atom_pool_gen(A->atoms, "__endif");
cond = _slang_gen_operation(A, &oper->children[0]);
- cond = _slang_gen_cond(cond);
+ cond = new_cond(cond);
/*assert(cond->Store);*/
bra = new_cjump(haveElseClause ? elseAtom : endifAtom, 0);
tree = new_seq(cond, bra);
@@ -1572,7 +1561,7 @@ _slang_gen_hl_if(slang_assemble_ctx * A, const slang_operation *oper)
slang_ir_node *ifNode, *cond, *ifBody, *elseBody;
cond = _slang_gen_operation(A, &oper->children[0]);
- cond = _slang_gen_cond(cond);
+ cond = new_cond(cond);
ifBody = _slang_gen_operation(A, &oper->children[1]);
if (haveElseClause)
elseBody = _slang_gen_operation(A, &oper->children[2]);
@@ -1662,7 +1651,7 @@ _slang_gen_select(slang_assemble_ctx *A, slang_operation *oper)
/* eval condition */
cond = _slang_gen_operation(A, &oper->children[0]);
- cond = _slang_gen_cond(cond);
+ cond = new_cond(cond);
tree = new_seq(tmpDecl, cond);
/* jump if false to "alt" label */
@@ -2245,9 +2234,6 @@ _slang_gen_operation(slang_assemble_ctx * A, slang_operation *oper)
case slang_oper_block_no_new_scope:
/* list of operations */
- /*
- assert(oper->num_children > 0);
- */
if (oper->num_children > 0)
{
slang_ir_node *n, *tree = NULL;
@@ -2287,7 +2273,7 @@ _slang_gen_operation(slang_assemble_ctx * A, slang_operation *oper)
break;
case slang_oper_expression:
return _slang_gen_operation(A, &oper->children[0]);
- break;
+
case slang_oper_for:
return _slang_gen_for(A, oper);
case slang_oper_do:
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-15 13:34:07 +0000