This CL adds the machinery to emit binary operations to the IR. The
debug helper is split into Debug and Disassembler. The Disassembler is
used to help test the IR output.
Bug: tint:1718
Change-Id: Iffdd3be92e69a87828655ac41be91b34d5618174
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110841
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
This CL updates the if and switch nodes to store the condition value in
a register. The EmitExpression is updated to return a Register and the
builder updated to emit the expressions for the if, break-if, while,
and switch expressions.
Bug: tint:1718
Change-Id: Ie710812c74e8b9423a4aa997db451d9cdf304feb
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110784
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
This CL fills in the EmitLiteral method. Each literal is emitted as the
appropriate type of register. The literal is not added to the current
flow block as it is not yet used.
Bug: tint:1718
Change-Id: Ic6a576bcc08dc6ea251b60d1d079929ac4d97981
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110783
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
This CL renames the `Build` method in the test helper to be
`CreateBuilder` to maek the intention clearer. A second,
`CreateEmptyBuilder` is provided to allow for easier testing of
expressions.
The `current_flow_block` and `builder` are moved to public so they can
be used/updated during testing.
Bug: tint:1718
Change-Id: I663d4c7a3c76e6bf5396ca05f54fe634d35d0d56
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110781
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
This CL adds commented out blocks for the various switches required to
walk the AST.
Bug: tint:1718
Change-Id: I70e7c4d0168621bf97006a782f2942df1173c393
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/110780
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
This Cl removes the internal infrastructor and backend code
generation for the fallthrough statement.
Bug: tint:1644
Change-Id: I2a1de7d527865e5a7221074f4e0fb106599f4c57
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/109005
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
When emitting the if true/false blocks we attempt to set the merge
target if the start block hasn't branched. This isn't right, as if the
block branched to other control flow, then that isn't the end of the
flow chain for that branch. We have to look at the current branch
target, and, if it exists, branch that to the if merge block.
Bug: tint:1718
Change-Id: Ifcafc4dd12c805efbee9d1dbcbc42c6add8f06a9
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107861
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
This CL adds the ability to dump an IR graph to a dot file. The
`--dump-ir-graph` option is added to the main tint command. The IR code
is moved behind a TINT_BUILD_IR flag in order to allow the GN build to
continue to build the tint program.
Bug: tint:1718
Change-Id: I0953fe2a59a34c21bb6cd288cb90e9d0298af793
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107860
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
This CL adds the ability to convert a for statement into a loop control
flow node.
Bug: tint:1718
Change-Id: Ibd55ae3b202518d3362267eaa1f507dce6a9fe56
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107804
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
This CL adds `while` statement support into the IR builder, converting
them into loop flow nodes.
Bug: tint:1718
Change-Id: I6dbaa24a0082463281dc933f02805169836fedd6
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107803
Reviewed-by: Ben Clayton <bclayton@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
This CL adds `fallthrough` support to the IR building. Fallthrough is
deprecated but needs to be supported until removed from Tint.
Bug: tint:1718
Change-Id: I52ce4cc9953384a450ad09422b2ba38943284a42
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107802
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
This CL updates the IR builder to create control flow nodes for
a switch statement and the contained case statements.
Bug: tint:1718
Change-Id: I05b73db11ab14676cc123f436ae5912b1dbee0d5
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107801
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
This CL updates the flow node to track the nodes which are inbound
to the current target. This allows to fix an issue with a loop,
after a continuing with a break, properly eliminating dead code.
This also allows always providing the merge target for an if, it
just knows if it's disconnected by having zero inbound branches.
Bug: tint:1718
Change-Id: Ia9b9dbc734bf1e9cd0c829093c0cb1e470efb32e
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/107800
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Reviewed-by: Ben Clayton <bclayton@google.com>
Kokoro: Kokoro <noreply+kokoro@google.com>
This CL starts adding the basics for an IR for Tint. The IR is
a lower level representation then the AST with several of the
restrictions removed. For example, the IR is mutable, is a DAG
instead of a tree, and removes a number of WGSL constructs to
simplify transforms.
Bug: tint:1718
Change-Id: I6a16ac3116cee31410896c3a0424af7b41f958c3
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/105800
Commit-Queue: Dan Sinclair <dsinclair@chromium.org>
Kokoro: Kokoro <noreply+kokoro@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>
