Add a test for LoongArch relaxation

test/elf/loongarch64_relax-pcala-addi.sh

@@ -0,0 +1,58 @@
+#!/bin/bash
+. $(dirname $0)/common.inc
+
+cat <<'EOF' | $CC -o $t/a.o -c -xassembler -
+.globl get_sym1, get_sym2, get_sym3
+get_sym1:
+  la.pcrel $a0, sym1
+  ret
+get_sym2:
+  la.pcrel $a0, sym2
+  ret
+get_sym3:
+  la.pcrel $a0, sym3
+  ret
+EOF
+
+cat <<'EOF' | $CC -o $t/b.o -c -xassembler -
+.globl sym1, sym2, sym3
+sym1:
+  addi.w $a0, $r0, 1
+  ret
+.space 1024 * 1024
+sym2:
+  addi.w $a0, $r0, 2
+  ret
+.space 1024 * 1024
+sym3:
+  addi.w $a0, $r0, 3
+  ret
+EOF
+
+cat <<EOF | $CC -o $t/c.o -c -xc -
+#include <stdio.h>
+
+int (*get_sym1())();
+int (*get_sym2())();
+int (*get_sym3())();
+
+int main() {
+  printf("%d %d %d\n", get_sym1()(), get_sym2()(), get_sym3()());
+}
+EOF
+
+$CC -B. -o $t/exe1 $t/a.o $t/b.o $t/c.o -Wl,--no-relax
+$QEMU $t/exe1 | grep -q '^1 2 3$'
+
+$OBJDUMP -d $t/exe1 > $t/exe1.objdump
+grep -A1 '<get_sym1>:' $t/exe1.objdump | grep -q pcalau12i
+grep -A1 '<get_sym2>:' $t/exe1.objdump | grep -q pcalau12i
+grep -A1 '<get_sym3>:' $t/exe1.objdump | grep -q pcalau12i
+
+$CC -B. -o $t/exe2 $t/a.o $t/b.o $t/c.o -Wl,--relax
+$QEMU $t/exe2 | grep -q '^1 2 3$'
+
+$OBJDUMP -d $t/exe2 > $t/exe2.objdump
+grep -A1 '<get_sym1>:' $t/exe2.objdump | grep -q pcaddi
+grep -A1 '<get_sym2>:' $t/exe2.objdump | grep -q pcaddi
+grep -A1 '<get_sym3>:' $t/exe2.objdump | grep -q pcalau12i