[flang] Fix Failing rewrite-out_of_range testcase to only check for real 10 on supported platforms (#91629)

The real 10 tests fail on `AIX` on `PPC`, only check them on `x86_64`

Co-authored-by: Mark Danial <[email protected]>

Author: madanial0

flang/test/Evaluate/rewrite-out_of_range.F90

@@ -1,5 +1,5 @@
 ! Tests rewriting of OUT_OF_RANGE()
-! RUN: %flang_fc1 -fdebug-unparse %s 2>&1 | FileCheck %s
+! RUN: %flang_fc1 -fdebug-unparse -cpp %s 2>&1 | FileCheck %s --check-prefixes=CHECK%if target=x86_64{{.*}} %{,CHECK-X86-64%}
 
 logical round
 
@@ -194,12 +194,12 @@
 !CHECK:   PRINT *, " real", 8_4, "real", 8_4, .false._4
 !CHECK:   PRINT *, " real", 8_4, "real", 10_4, .false._4
 !CHECK:   PRINT *, " real", 8_4, "real", 16_4, .false._4
-!CHECK:   PRINT *, " real", 10_4, "real", 2_4, blt(transfer(abs(x)-6.5504e4_10,0_16)-1_16,604444463063240877801471_16)
-!CHECK:   PRINT *, " real", 10_4, "real", 3_4, blt(transfer(abs(x)-3.3895313892515354759047080037148786688e38_10,0_16)-1_16,604444463063240877801471_16)
-!CHECK:   PRINT *, " real", 10_4, "real", 4_4, blt(transfer(abs(x)-3.4028234663852885981170418348451692544e38_10,0_16)-1_16,604444463063240877801471_16)
-!CHECK:   PRINT *, " real", 10_4, "real", 8_4, blt(transfer(abs(x)-1.79769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368e308_10,0_16)-1_16,604444463063240877801471_16)
-!CHECK:   PRINT *, " real", 10_4, "real", 10_4, .false._4
-!CHECK:   PRINT *, " real", 10_4, "real", 16_4, .false._4
+!CHECK-X86-64:   PRINT *, " real", 10_4, "real", 2_4, blt(transfer(abs(x)-6.5504e4_10,0_16)-1_16,604444463063240877801471_16)
+!CHECK-X86-64:   PRINT *, " real", 10_4, "real", 3_4, blt(transfer(abs(x)-3.3895313892515354759047080037148786688e38_10,0_16)-1_16,604444463063240877801471_16)
+!CHECK-X86-64:   PRINT *, " real", 10_4, "real", 4_4, blt(transfer(abs(x)-3.4028234663852885981170418348451692544e38_10,0_16)-1_16,604444463063240877801471_16)
+!CHECK-X86-64:   PRINT *, " real", 10_4, "real", 8_4, blt(transfer(abs(x)-1.79769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368e308_10,0_16)-1_16,604444463063240877801471_16)
+!CHECK-X86-64:   PRINT *, " real", 10_4, "real", 10_4, .false._4
+!CHECK-X86-64:   PRINT *, " real", 10_4, "real", 16_4, .false._4
 !CHECK:   PRINT *, " real", 16_4, "real", 2_4, blt(transfer(abs(x)-6.5504e4_16,0_16)-1_16,170135991163610696904058773219554885631_16)
 !CHECK:   PRINT *, " real", 16_4, "real", 3_4, blt(transfer(abs(x)-3.3895313892515354759047080037148786688e38_16,0_16)-1_16,170135991163610696904058773219554885631_16)
 !CHECK:   PRINT *, " real", 16_4, "real", 4_4, blt(transfer(abs(x)-3.4028234663852885981170418348451692544e38_16,0_16)-1_16,170135991163610696904058773219554885631_16)