[llvm] [GlobalIsel] Add Gallery to MIR Patterns (PR #89974)
via llvm-commits
llvm-commits at lists.llvm.org
Wed Apr 24 11:49:07 PDT 2024
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-llvm-globalisel
Author: Thorsten Schütt (tschuett)
<details>
<summary>Changes</summary>
---
Full diff: https://github.com/llvm/llvm-project/pull/89974.diff
1 Files Affected:
- (modified) llvm/docs/GlobalISel/MIRPatterns.rst (+18)
``````````diff
diff --git a/llvm/docs/GlobalISel/MIRPatterns.rst b/llvm/docs/GlobalISel/MIRPatterns.rst
index 728e3247014452..97717005ebd619 100644
--- a/llvm/docs/GlobalISel/MIRPatterns.rst
+++ b/llvm/docs/GlobalISel/MIRPatterns.rst
@@ -514,3 +514,21 @@ of operands.
(match (does_not_bind $tmp, $x)
(G_MUL $dst, $x, $tmp)),
(apply (COPY $dst, $x))>;
+
+
+ Gallery
+----------------
+
+We should use precise patterns that state our intentions. Please avoid
+using wip_match_opcode in patterns.
+
+.. code-block:: text
+ :caption: Example fold ext(trunc)
+
+(match (wip_match_opcode G_ZEXT):$root,
+
+(match (G_TRUNC $src, $x),
+ (G_ZEXT $root, $src),
+
+(match (G_TRUNC $src, $x, (MIFlags NoUWrap)),
+ (G_ZEXT $root, $src),
``````````
</details>
https://github.com/llvm/llvm-project/pull/89974
More information about the llvm-commits
mailing list