The problem here is the aarch64 backend enables -mearly-ra at -O2 and above but
it is not marked as an Optimization in the .opt file so enabling it sometimes
reset the target options when going from -O1 to -O2 for the first time.
Build and tested for aarch64-linux-gnu with no regressions.
PR target/116065
gcc/ChangeLog:
* config/aarch64/aarch64.opt (mearly-ra=): Mark as Optimization rather
than Save.
gcc/testsuite/ChangeLog:
* gcc.target/aarch64/sve/target_optimization-1.c: New test.
Signed-off-by: Andrew Pinski <quic_apin...@quicinc.com>
---
gcc/config/aarch64/aarch64.opt | 2 +-
.../aarch64/sve/target_optimization-1.c | 16 ++++++++++++++++
2 files changed, 17 insertions(+), 1 deletion(-)
create mode 100644 gcc/testsuite/gcc.target/aarch64/sve/target_optimization-1.c
diff --git a/gcc/config/aarch64/aarch64.opt b/gcc/config/aarch64/aarch64.opt
index 2f90f10352a..6229bcb371e 100644
--- a/gcc/config/aarch64/aarch64.opt
+++ b/gcc/config/aarch64/aarch64.opt
@@ -256,7 +256,7 @@ EnumValue
Enum(early_ra_scope) String(none) Value(AARCH64_EARLY_RA_NONE)
mearly-ra=
-Target RejectNegative Joined Enum(early_ra_scope) Var(aarch64_early_ra)
Init(AARCH64_EARLY_RA_NONE) Save
+Target RejectNegative Joined Enum(early_ra_scope) Var(aarch64_early_ra)
Init(AARCH64_EARLY_RA_NONE) Optimization
Specify when to enable an early register allocation pass. The possibilities
are: all functions, functions that have access to strided multi-register
instructions, and no functions.
diff --git a/gcc/testsuite/gcc.target/aarch64/sve/target_optimization-1.c
b/gcc/testsuite/gcc.target/aarch64/sve/target_optimization-1.c
new file mode 100644
index 00000000000..3010f0c4189
--- /dev/null
+++ b/gcc/testsuite/gcc.target/aarch64/sve/target_optimization-1.c
@@ -0,0 +1,16 @@
+/* { dg-do compile } */
+/* { dg-options "-O1" } */
+
+#include <arm_sve.h>
+
+/* Turn off SVE overall */
+#pragma GCC target("+nosve")
+
+/* But the function turns it on again so it should work.
+ Even if changing the optimization level from O1 to O2. */
+int __attribute__((target ("+sve"), optimize(2)))
+bar (void)
+{
+ svfloat32_t xseg;
+ return svlen_f32(xseg);
+}
--
2.43.0
