[gcc r16-3839] testsuite: Port asm-hard-reg tests for PRU

[Dimitar Dimitrov]

https://gcc.gnu.org/g:d020b73ce0002926866f506898cacfe54417e148

commit r16-3839-gd020b73ce0002926866f506898cacfe54417e148
Author: Dimitar Dimitrov <dimitar@dinux.eu>
Date:   Sat Sep 13 10:56:35 2025 +0300

    testsuite: Port asm-hard-reg tests for PRU
    
    Add the necessary register definitions for PRU, so that asm-hard-reg
    tests can pass for PRU.
    
    gcc/testsuite/ChangeLog:
    
            * gcc.dg/asm-hard-reg-error-1.c: Enable test for PRU, and define
            registers for PRU.
            * gcc.dg/asm-hard-reg-error-4.c: Define hard regs for PRU.
            * gcc.dg/asm-hard-reg-error-5.c: Ditto.
    
    Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>

Diff:
---
 gcc/testsuite/gcc.dg/asm-hard-reg-error-1.c | 7 ++++++-
 gcc/testsuite/gcc.dg/asm-hard-reg-error-4.c | 3 +++
 gcc/testsuite/gcc.dg/asm-hard-reg-error-5.c | 3 +++
 3 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/gcc/testsuite/gcc.dg/asm-hard-reg-error-1.c b/gcc/testsuite/gcc.dg/asm-hard-reg-error-1.c
index 0d7c2f210d83..0a31c8508c76 100644
--- a/gcc/testsuite/gcc.dg/asm-hard-reg-error-1.c
+++ b/gcc/testsuite/gcc.dg/asm-hard-reg-error-1.c
@@ -1,4 +1,4 @@
-/* { dg-do compile { target aarch64*-*-* arm*-*-* i?86-*-* powerpc*-*-* riscv*-*-* s390*-*-* x86_64-*-* } } */
+/* { dg-do compile { target aarch64*-*-* arm*-*-* i?86-*-* powerpc*-*-* pru*-*-* riscv*-*-* s390*-*-* x86_64-*-* } } */
 
 #if defined (__aarch64__)
 # define GPR1_RAW "x0"
@@ -20,6 +20,11 @@
 # define GPR2 "{r5}"
 # define GPR3 "{r6}"
 # define INVALID_GPR_A "{r33}"
+#elif defined (__PRU__)
+# define GPR1_RAW "r20"
+# define GPR2 "{r21}"
+# define GPR3 "{r22}"
+# define INVALID_GPR_A "{r34}"
 #elif defined (__riscv)
 # define GPR1_RAW "t4"
 # define GPR2 "{t5}"
diff --git a/gcc/testsuite/gcc.dg/asm-hard-reg-error-4.c b/gcc/testsuite/gcc.dg/asm-hard-reg-error-4.c
index d1856ad48187..c1e07c9f930d 100644
--- a/gcc/testsuite/gcc.dg/asm-hard-reg-error-4.c
+++ b/gcc/testsuite/gcc.dg/asm-hard-reg-error-4.c
@@ -8,6 +8,9 @@
 #elif defined __AVR__
 # define R0 "20"
 # define R1 "24"
+#elif defined __PRU__
+# define R0 "0"
+# define R1 "4"
 #else
 # define R0 "0"
 # define R1 "1"
diff --git a/gcc/testsuite/gcc.dg/asm-hard-reg-error-5.c b/gcc/testsuite/gcc.dg/asm-hard-reg-error-5.c
index 7f538ea9b9e0..6588b09c3778 100644
--- a/gcc/testsuite/gcc.dg/asm-hard-reg-error-5.c
+++ b/gcc/testsuite/gcc.dg/asm-hard-reg-error-5.c
@@ -9,6 +9,9 @@
 #elif defined __AVR__
 # define R0 "20"
 # define R1 "24"
+#elif defined __PRU__
+# define R0 "0"
+# define R1 "4"
 #else
 # define R0 "0"
 # define R1 "1"