[llvm] [Offload][Tests] Non-contiguous_update_to_tests (PR #169623)
Amit Tiwari via llvm-commits
llvm-commits at lists.llvm.org
Thu Nov 27 00:44:43 PST 2025
https://github.com/amitamd7 updated https://github.com/llvm/llvm-project/pull/169623
>From 9aca39194e1bd728e33db3634395804f13e9c46c Mon Sep 17 00:00:00 2001
From: amtiwari <amtiwari at amd.com>
Date: Wed, 26 Nov 2025 03:58:44 -0500
Subject: [PATCH] non-contiguous_update_to_tests
---
...pdate.c => strided_multiple_update_from.c} | 0
.../offloading/strided_multiple_update_to.c | 123 ++++++++++++++++++
...update.c => strided_partial_update_from.c} | 0
.../offloading/strided_partial_update_to.c | 73 +++++++++++
...strided_update.c => strided_update_from.c} | 0
offload/test/offloading/strided_update_to.c | 72 ++++++++++
6 files changed, 268 insertions(+)
rename offload/test/offloading/{strided_multiple_update.c => strided_multiple_update_from.c} (100%)
create mode 100644 offload/test/offloading/strided_multiple_update_to.c
rename offload/test/offloading/{strided_partial_update.c => strided_partial_update_from.c} (100%)
create mode 100644 offload/test/offloading/strided_partial_update_to.c
rename offload/test/offloading/{strided_update.c => strided_update_from.c} (100%)
create mode 100644 offload/test/offloading/strided_update_to.c
diff --git a/offload/test/offloading/strided_multiple_update.c b/offload/test/offloading/strided_multiple_update_from.c
similarity index 100%
rename from offload/test/offloading/strided_multiple_update.c
rename to offload/test/offloading/strided_multiple_update_from.c
diff --git a/offload/test/offloading/strided_multiple_update_to.c b/offload/test/offloading/strided_multiple_update_to.c
new file mode 100644
index 0000000000000..911c1dddeb2f5
--- /dev/null
+++ b/offload/test/offloading/strided_multiple_update_to.c
@@ -0,0 +1,123 @@
+// This test checks that #pragma omp target update to(data1[0:3:4],
+// data2[0:2:5]) correctly updates disjoint strided sections of multiple arrays
+// from the host to the device.
+
+// RUN: %libomptarget-compile-run-and-check-generic
+#include <omp.h>
+#include <stdio.h>
+
+int main() {
+ int len = 12;
+ double data1[len], data2[len];
+
+ // Initialize host arrays
+ for (int i = 0; i < len; i++) {
+ data1[i] = i;
+ data2[i] = i * 10;
+ }
+
+ printf("original host array values:\n");
+ printf("data1:\n");
+ for (int i = 0; i < len; i++)
+ printf("%.1f\n", data1[i]);
+ printf("data2:\n");
+ for (int i = 0; i < len; i++)
+ printf("%.1f\n", data2[i]);
+
+ // CHECK: original host array values:
+ // CHECK-NEXT: data1:
+ // CHECK-NEXT: 0.0
+ // CHECK-NEXT: 1.0
+ // CHECK-NEXT: 2.0
+ // CHECK-NEXT: 3.0
+ // CHECK-NEXT: 4.0
+ // CHECK-NEXT: 5.0
+ // CHECK-NEXT: 6.0
+ // CHECK-NEXT: 7.0
+ // CHECK-NEXT: 8.0
+ // CHECK-NEXT: 9.0
+ // CHECK-NEXT: 10.0
+ // CHECK-NEXT: 11.0
+ // CHECK-NEXT: data2:
+ // CHECK-NEXT: 0.0
+ // CHECK-NEXT: 10.0
+ // CHECK-NEXT: 20.0
+ // CHECK-NEXT: 30.0
+ // CHECK-NEXT: 40.0
+ // CHECK-NEXT: 50.0
+ // CHECK-NEXT: 60.0
+ // CHECK-NEXT: 70.0
+ // CHECK-NEXT: 80.0
+ // CHECK-NEXT: 90.0
+ // CHECK-NEXT: 100.0
+ // CHECK-NEXT: 110.0
+
+#pragma omp target data map(tofrom : data1[0 : len], data2[0 : len])
+ {
+ // Initialize device arrays to 20
+#pragma omp target
+ {
+ for (int i = 0; i < len; i++) {
+ data1[i] = 20.0;
+ data2[i] = 20.0;
+ }
+ }
+
+ // Modify host arrays for strided elements
+ data1[0] = 10.0;
+ data1[4] = 10.0;
+ data1[8] = 10.0;
+ data2[0] = 10.0;
+ data2[5] = 10.0;
+
+ // data1[0:3:4] // indices 0,4,8
+ // data2[0:2:5] // indices 0,5
+#pragma omp target update to(data1[0 : 3 : 4], data2[0 : 2 : 5])
+
+ // Verify on device by adding 5
+#pragma omp target
+ {
+ for (int i = 0; i < len; i++)
+ data1[i] += 5.0;
+ for (int i = 0; i < len; i++)
+ data2[i] += 5.0;
+ }
+ }
+
+ printf("device array values after update to:\n");
+ printf("data1:\n");
+ for (int i = 0; i < len; i++)
+ printf("%.1f\n", data1[i]);
+ printf("data2:\n");
+ for (int i = 0; i < len; i++)
+ printf("%.1f\n", data2[i]);
+
+ // CHECK: device array values after update to:
+ // CHECK-NEXT: data1:
+ // CHECK-NEXT: 15.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 15.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 15.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: data2:
+ // CHECK-NEXT: 15.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 15.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+ // CHECK-NEXT: 25.0
+}
+
diff --git a/offload/test/offloading/strided_partial_update.c b/offload/test/offloading/strided_partial_update_from.c
similarity index 100%
rename from offload/test/offloading/strided_partial_update.c
rename to offload/test/offloading/strided_partial_update_from.c
diff --git a/offload/test/offloading/strided_partial_update_to.c b/offload/test/offloading/strided_partial_update_to.c
new file mode 100644
index 0000000000000..baef7201c6b0c
--- /dev/null
+++ b/offload/test/offloading/strided_partial_update_to.c
@@ -0,0 +1,73 @@
+// This test checks that #pragma omp target update to(data[0:4:3]) correctly
+// updates every third element (stride 3) from the host to the device, partially
+// across the array
+
+// RUN: %libomptarget-compile-run-and-check-generic
+#include <omp.h>
+#include <stdio.h>
+
+int main() {
+ int len = 11;
+ double data[len];
+
+ // Initialize on host
+ for (int i = 0; i < len; i++)
+ data[i] = i;
+
+ // Initial values
+ printf("original host array values:\n");
+ for (int i = 0; i < len; i++)
+ printf("%f\n", data[i]);
+ printf("\n");
+
+ // CHECK: 0.000000
+ // CHECK: 1.000000
+ // CHECK: 2.000000
+ // CHECK: 3.000000
+ // CHECK: 4.000000
+ // CHECK: 5.000000
+ // CHECK: 6.000000
+ // CHECK: 7.000000
+ // CHECK: 8.000000
+ // CHECK: 9.000000
+ // CHECK: 10.000000
+
+#pragma omp target data map(tofrom : data[0 : len])
+ {
+ // Initialize device array to 20
+#pragma omp target
+ for (int i = 0; i < len; i++)
+ data[i] = 20.0;
+
+ // Modify host data for strided elements
+ data[0] = 10.0;
+ data[3] = 10.0;
+ data[6] = 10.0;
+ data[9] = 10.0;
+
+#pragma omp target update to(data[0 : 4 : 3]) // indices 0,3,6,9
+
+ // Verify on device by adding 5
+#pragma omp target
+ for (int i = 0; i < len; i++)
+ data[i] += 5.0;
+ }
+
+ printf("device array values after update to:\n");
+ for (int i = 0; i < len; i++)
+ printf("%f\n", data[i]);
+ printf("\n");
+
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+}
+
diff --git a/offload/test/offloading/strided_update.c b/offload/test/offloading/strided_update_from.c
similarity index 100%
rename from offload/test/offloading/strided_update.c
rename to offload/test/offloading/strided_update_from.c
diff --git a/offload/test/offloading/strided_update_to.c b/offload/test/offloading/strided_update_to.c
new file mode 100644
index 0000000000000..89f80e021394a
--- /dev/null
+++ b/offload/test/offloading/strided_update_to.c
@@ -0,0 +1,72 @@
+// This test checks that "update to" clause in OpenMP is supported when the
+// elements are updated in a non-contiguous manner. This test checks that
+// #pragma omp target update to(data[0:4:2]) correctly updates only every
+// other element (stride 2) from the host to the device
+
+// RUN: %libomptarget-compile-run-and-check-generic
+#include <omp.h>
+#include <stdio.h>
+
+int main() {
+ int len = 8;
+ double data[len];
+
+ // Initialize on host
+ for (int i = 0; i < len; i++) {
+ data[i] = i;
+ }
+
+ // Initial values
+ printf("original host array values:\n");
+ for (int i = 0; i < len; i++)
+ printf("%f\n", data[i]);
+ printf("\n");
+
+#pragma omp target data map(tofrom : len, data[0 : len])
+ {
+ // Initialize device to 20
+#pragma omp target
+ for (int i = 0; i < len; i++) {
+ data[i] = 20.0;
+ }
+
+ // Modify host for strided elements
+ data[0] = 10.0;
+ data[2] = 10.0;
+ data[4] = 10.0;
+ data[6] = 10.0;
+
+#pragma omp target update to(data[0 : 4 : 2])
+
+ // Verify on device by adding 5
+#pragma omp target
+ for (int i = 0; i < len; i++) {
+ data[i] += 5.0;
+ }
+ }
+
+ // CHECK: 0.000000
+ // CHECK: 1.000000
+ // CHECK: 2.000000
+ // CHECK: 3.000000
+ // CHECK: 4.000000
+ // CHECK: 5.000000
+ // CHECK: 6.000000
+ // CHECK: 7.000000
+
+ printf("device array values after update to:\n");
+ for (int i = 0; i < len; i++)
+ printf("%f\n", data[i]);
+ printf("\n");
+
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+ // CHECK: 15.000000
+ // CHECK: 25.000000
+
+ return 0;
+}
\ No newline at end of file
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