[v1] LoongArch: Enable '-free' starting at -O2.
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gcc/ChangeLog:
* common/config/loongarch/loongarch-common.cc:
Enable '-free' on O2 and above.
* doc/invoke.texi:
Modify the description information of the '-free'
compilation option and add the LoongArch description.
gcc/testsuite/ChangeLog:
* gcc.target/loongarch/sign-extend.c: New test.
---
.../config/loongarch/loongarch-common.cc | 1 +
gcc/doc/invoke.texi | 4 +--
.../gcc.target/loongarch/sign-extend.c | 25 +++++++++++++++++++
3 files changed, 28 insertions(+), 2 deletions(-)
create mode 100644 gcc/testsuite/gcc.target/loongarch/sign-extend.c
@@ -35,6 +35,7 @@ static const struct default_options loongarch_option_optimization_table[] =
{
{ OPT_LEVELS_ALL, OPT_fasynchronous_unwind_tables, NULL, 1 },
{ OPT_LEVELS_1_PLUS, OPT_fsection_anchors, NULL, 1 },
+ { OPT_LEVELS_2_PLUS, OPT_free, NULL, 1 },
{ OPT_LEVELS_NONE, 0, NULL, 0 }
};
@@ -12639,8 +12639,8 @@ Attempt to remove redundant extension instructions. This is especially
helpful for the x86-64 architecture, which implicitly zero-extends in 64-bit
registers after writing to their lower 32-bit half.
-Enabled for Alpha, AArch64, PowerPC, RISC-V, SPARC, h83000 and x86 at levels
-@option{-O2}, @option{-O3}, @option{-Os}.
+Enabled for Alpha, AArch64, LoongArch, PowerPC, RISC-V, SPARC, h83000 and x86 at
+levels @option{-O2}, @option{-O3}, @option{-Os}.
@opindex fno-lifetime-dse
@opindex flifetime-dse
new file mode 100644
@@ -0,0 +1,25 @@
+/* { dg-do compile } */
+/* { dg-options "-mabi=lp64d -O2" } */
+/* { dg-final { scan-assembler-times "slli.w" 1 } } */
+
+extern int PL_savestack_ix;
+extern int PL_regsize;
+extern int PL_savestack_max;
+void Perl_savestack_grow_cnt (int need);
+extern void Perl_croak (char *);
+
+int
+S_regcppush(int parenfloor)
+{
+ int retval = PL_savestack_ix;
+ int paren_elems_to_push = (PL_regsize - parenfloor) * 4;
+ int p;
+
+ if (paren_elems_to_push < 0)
+ Perl_croak ("panic: paren_elems_to_push < 0");
+
+ if (PL_savestack_ix + (paren_elems_to_push + 6) > PL_savestack_max)
+ Perl_savestack_grow_cnt (paren_elems_to_push + 6);
+
+ return retval;
+}