diff mbox series

RISC-V: Support -m[no-]unaligned-access

Message ID CAHtqR7U-33VeGbCXsu2Xo2=5=aESTZTw8DEE7t1xQ_eogp=cNA@mail.gmail.com
State New
Headers show
Series RISC-V: Support -m[no-]unaligned-access | expand

Commit Message

Wang Pengcheng Dec. 22, 2023, 9:23 a.m. UTC 
These two options are negative alias of -m[no-]strict-align.

This matches LLVM implmentation.

gcc/ChangeLog:

* config/riscv/riscv.opt: Add option alias.

gcc/testsuite/ChangeLog:

* gcc.target/riscv/predef-align-10.c: New test.
* gcc.target/riscv/predef-align-7.c: New test.
* gcc.target/riscv/predef-align-8.c: New test.
* gcc.target/riscv/predef-align-9.c: New test.

Signed-off-by: Wang Pengcheng
---
gcc/config/riscv/riscv.opt | 4 ++++
gcc/testsuite/gcc.target/riscv/predef-align-10.c | 16 ++++++++++++++++
gcc/testsuite/gcc.target/riscv/predef-align-7.c | 15 +++++++++++++++
gcc/testsuite/gcc.target/riscv/predef-align-8.c | 16 ++++++++++++++++
gcc/testsuite/gcc.target/riscv/predef-align-9.c | 15 +++++++++++++++
5 files changed, 66 insertions(+)
create mode 100644 gcc/testsuite/gcc.target/riscv/predef-align-10.c
create mode 100644 gcc/testsuite/gcc.target/riscv/predef-align-7.c
create mode 100644 gcc/testsuite/gcc.target/riscv/predef-align-8.c
create mode 100644 gcc/testsuite/gcc.target/riscv/predef-align-9.c

+}
diff mbox series

Patch

diff --git a/gcc/config/riscv/riscv.opt b/gcc/config/riscv/riscv.opt
index cf207d4dcdf..1e22998ce6e 100644
--- a/gcc/config/riscv/riscv.opt
+++ b/gcc/config/riscv/riscv.opt
@@ -116,6 +116,10 @@  mstrict-align
Target Mask(STRICT_ALIGN) Save
Do not generate unaligned memory accesses.

+munaligned-access
+Target Alias(mstrict-align) NegativeAlias
+Enable unaligned memory accesses.
+
Enum
Name(code_model) Type(enum riscv_code_model)
Known code models (for use with the -mcmodel= option):
diff --git a/gcc/testsuite/gcc.target/riscv/predef-align-10.c
b/gcc/testsuite/gcc.target/riscv/predef-align-10.c
new file mode 100644
index 00000000000..c86b2c7a5ed
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/predef-align-10.c
@@ -0,0 +1,16 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mtune=rocket -munaligned-access" } */
+
+int main() {
+
+/* rocket default is cpu tune param misaligned access slow */
+#if !defined(__riscv_misaligned_slow)
+#error "__riscv_misaligned_slow is not set"
+#endif
+
+#if defined(__riscv_misaligned_avoid) || defined(__riscv_misaligned_fast)
+#error "__riscv_misaligned_avoid or __riscv_misaligned_fast is
unexpectedly set"
+#endif
+
+ return 0;
+}
diff --git a/gcc/testsuite/gcc.target/riscv/predef-align-7.c
b/gcc/testsuite/gcc.target/riscv/predef-align-7.c
new file mode 100644
index 00000000000..405f3686c2e
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/predef-align-7.c
@@ -0,0 +1,15 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mtune=thead-c906 -mno-unaligned-access" } */
+
+int main() {
+
+#if !defined(__riscv_misaligned_avoid)
+#error "__riscv_misaligned_avoid is not set"
+#endif
+
+#if defined(__riscv_misaligned_fast) || defined(__riscv_misaligned_slow)
+#error "__riscv_misaligned_fast or __riscv_misaligned_slow is unexpectedly
set"
+#endif
+
+ return 0;
+}
diff --git a/gcc/testsuite/gcc.target/riscv/predef-align-8.c
b/gcc/testsuite/gcc.target/riscv/predef-align-8.c
new file mode 100644
index 00000000000..64072c04a47
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/predef-align-8.c
@@ -0,0 +1,16 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mtune=thead-c906 -munaligned-access" } */
+
+int main() {
+
+/* thead-c906 default is cpu tune param misaligned access fast */
+#if !defined(__riscv_misaligned_fast)
+#error "__riscv_misaligned_fast is not set"
+#endif
+
+#if defined(__riscv_misaligned_avoid) || defined(__riscv_misaligned_slow)
+#error "__riscv_misaligned_avoid or __riscv_misaligned_slow is
unexpectedly set"
+#endif
+
+ return 0;
+}
diff --git a/gcc/testsuite/gcc.target/riscv/predef-align-9.c
b/gcc/testsuite/gcc.target/riscv/predef-align-9.c
new file mode 100644
index 00000000000..f5418de87cf
--- /dev/null
+++ b/gcc/testsuite/gcc.target/riscv/predef-align-9.c
@@ -0,0 +1,15 @@ 
+/* { dg-do compile } */
+/* { dg-options "-mtune=rocket -mno-unaligned-access" } */
+
+int main() {
+
+#if !defined(__riscv_misaligned_avoid)
+#error "__riscv_misaligned_avoid is not set"
+#endif
+
+#if defined(__riscv_misaligned_fast) || defined(__riscv_misaligned_slow)
+#error "__riscv_misaligned_fast or __riscv_misaligned_slow is unexpectedly
set"
+#endif
+
+ return 0;