From a5dfa5cd2bfa11fb3d9e84877f8dead1815e9077 Mon Sep 17 00:00:00 2001 From: Tim Foley Date: Tue, 7 Nov 2017 16:47:36 -0800 Subject: IR: add support for `discard` statement (#261) - Add definition of `discard` instruction - A `discard` is a terminator instruction, just like `returnVoid` - Lower `DiscardStmt` in AST to a `discard` instruction in the IR - Emit `discard` instruction as a `discard;` statement when emitting HLSL/GLSL - Add a test case using the "graphics compute" mode that tests discard. The test writes to one entry in a UAV before doing a conditional (always true at runtime) discard, and then writes to another entry; we expect to see the results of the first write, but not the second. --- source/slang/lower-to-ir.cpp | 5 +++++ 1 file changed, 5 insertions(+) (limited to 'source/slang/lower-to-ir.cpp') diff --git a/source/slang/lower-to-ir.cpp b/source/slang/lower-to-ir.cpp index 4fabd6a81..86f037435 100644 --- a/source/slang/lower-to-ir.cpp +++ b/source/slang/lower-to-ir.cpp @@ -1912,6 +1912,11 @@ struct StmtLoweringVisitor : StmtVisitor getBuilder()->emitReturn(); } } + + void visitDiscardStmt(DiscardStmt* /*stmt*/) + { + getBuilder()->emitDiscard(); + } }; void lowerStmt( -- cgit v1.2.3