Merge pull request #5683 from martin-frbg/fix_skx_smallgemm

martin-frbg · web-flow · commit b3de37c96b79 · 2026-03-18T09:08:05.000+01:00
Fix potential over-optimization of the AVX512 small SGEMM kernel by gcc15
diff --git a/kernel/x86_64/sgemm_small_kernel_tt_skylakex.c b/kernel/x86_64/sgemm_small_kernel_tt_skylakex.c
@@ -307,7 +307,7 @@ int CNAME(BLASLONG M, BLASLONG N, BLASLONG K, FLOAT * A, BLASLONG lda, FLOAT alp
 		}
 	}
 	if (i < M) {
-		int index_n[16];
+		static int index_n[16];
 		for (int ii = 0; ii < 16; ii++) {
 			index_n[ii] = ii * ldc;
 		}

Original file line number	Diff line number	Diff line change
`@@ -307,7 +307,7 @@ int CNAME(BLASLONG M, BLASLONG N, BLASLONG K, FLOAT * A, BLASLONG lda, FLOAT alp`
`307`	`307`	`}`
`308`	`308`	`}`
`309`	`309`	`if (i < M) {`
`310`		`- int index_n[16];`
	`310`	`+ static int index_n[16];`
`311`	`311`	`for (int ii = 0; ii < 16; ii++) {`
`312`	`312`	`index_n[ii] = ii * ldc;`
`313`	`313`	`}`