[RISCV] ReadStoreData is read later in the pipeline for SiFive7 #86454
+1
−1
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Store data is read later in the pipeline, so we use SiFive7AnyToGPRBypass to model that a store instruction can begin some cycles before that data is ready.
|
@llvm/pr-subscribers-backend-risc-v Author: Michael Maitland (michaelmaitland) ChangesStore data is read later in the pipeline, so we use SiFive7AnyToGPRBypass to model that a store instruction can begin some cycles before that data is ready. Full diff: https://github.com/llvm/llvm-project/pull/86454.diff 1 Files Affected:
diff --git a/llvm/lib/Target/RISCV/RISCVSchedSiFive7.td b/llvm/lib/Target/RISCV/RISCVSchedSiFive7.td
index 3586d235bdbbb9..54a13889ee698a 100644
--- a/llvm/lib/Target/RISCV/RISCVSchedSiFive7.td
+++ b/llvm/lib/Target/RISCV/RISCVSchedSiFive7.td
@@ -950,7 +950,7 @@ def : InstRW<[WriteIALU], (instrs COPY)>;
def : SiFive7AnyToGPRBypass<ReadJmp>;
def : SiFive7AnyToGPRBypass<ReadJalr>;
def : ReadAdvance<ReadCSR, 0>;
-def : ReadAdvance<ReadStoreData, 0>;
+def : SiFive7AnyToGPRBypass<ReadStoreData>;
def : ReadAdvance<ReadMemBase, 0>;
def : SiFive7AnyToGPRBypass<ReadIALU>;
def : SiFive7AnyToGPRBypass<ReadIALU32>;
|
|
✅ With the latest revision this PR passed the Python code formatter. |
|
✅ With the latest revision this PR passed the C/C++ code formatter. |
|
ping |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Store data is read later in the pipeline, so we use SiFive7AnyToGPRBypass to model that a store instruction can begin some cycles before that data is ready.