Expand diff run lines in profiling tests for lit compatibility

Expanded the `diff` run lines in several profiling test files to avoid using process substitution (`<(...)`), which is not supported by the `lit` internal shell. The updated commands now explicitly redirect the output of `llvm-profdata show` to temporary files before performing the comparison with `diff`.
In the `focus-function.test` file, the requirement for `shell` was added because `lit` does not support the `for` loop syntax, which is necessary for the script to run correctly.

Author: Harini0924

compiler-rt/test/fuzzer/focus-function.test

@@ -1,7 +1,7 @@
 # Tests -focus_function
 #
 # TODO: don't require linux.
-# REQUIRES: linux
+# REQUIRES: shell, linux
 UNSUPPORTED: target=aarch64{{.*}}
 
 RUN: %cpp_compiler %S/OnlySomeBytesTest.cpp -o %t-exe

compiler-rt/test/profile/Linux/counter_promo_for.c

@@ -12,7 +12,9 @@
 // RUN: %run %t.nopromo.gen
 // RUN: llvm-profdata merge -o %t.nopromo.profdata %t.nopromo.prof/
 // RUN: llvm-profdata show --counts --all-functions %t.nopromo.profdata  > %t.nopromo.dump
-// RUN: diff <(llvm-profdata show %t.promo.profdata) <(llvm-profdata show %t.nopromo.profdata)
+// RUN: llvm-profdata show %t.promo.profdata > %t.promo.dump
+// RUN: llvm-profdata show %t.nopromo.profdata > %t.nopromo.dump
+// RUN: diff %t.promo.dump %t.nopromo.dump
 
 int g;
 __attribute__((noinline)) void bar(int i) { g += i; }

compiler-rt/test/profile/Linux/counter_promo_nest.c

@@ -10,7 +10,9 @@
 // RUN: %run %t.nopromo.gen
 // RUN: llvm-profdata merge -o %t.nopromo.profdata %t.nopromo.prof/
 // RUN: llvm-profdata show --counts --all-functions %t.nopromo.profdata  > %t.nopromo.dump
-// RUN: diff <(llvm-profdata show %t.promo.profdata) <(llvm-profdata show %t.nopromo.profdata)
+// RUN: llvm-profdata show %t.promo.profdata > %t.promo.dump
+// RUN: llvm-profdata show %t.nopromo.profdata > %t.nopromo.dump
+// RUN: diff %t.promo.dump %t.nopromo.dump
 int g;
 __attribute__((noinline)) void bar() {
  g++;

compiler-rt/test/profile/Linux/counter_promo_while.c

@@ -12,7 +12,10 @@
 // RUN: %run %t.nopromo.gen
 // RUN: llvm-profdata merge -o %t.nopromo.profdata %t.nopromo.prof/
 // RUN: llvm-profdata show --counts --all-functions %t.nopromo.profdata  > %t.nopromo.dump
-// RUN: diff <(llvm-profdata show %t.promo.profdata) <(llvm-profdata show %t.nopromo.profdata)
+// RUN: llvm-profdata show %t.promo.profdata > %t.promo.dump
+// RUN: llvm-profdata show %t.nopromo.profdata > %t.nopromo.dump
+// RUN: diff %t.promo.dump %t.nopromo.dump
+
 int g;
 __attribute__((noinline)) void bar(int i) { g += i; }
 __attribute__((noinline)) void foo(int n, int N) {

compiler-rt/test/profile/Linux/instrprof-debug-info-correlate.c

@@ -7,13 +7,17 @@
 // RUN: env LLVM_PROFILE_FILE=%t.d4.proflite %run %t.d4
 // RUN: llvm-profdata merge -o %t.d4.profdata --debug-info=%t.d4 %t.d4.proflite
 
-// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.d4.profdata)
+// RUN: llvm-profdata show --all-functions --counts %t.normal.profdata > %t.normal.dump
+// RUN: llvm-profdata show --all-functions --counts %t.d4.profdata > %t.d4.dump
+// RUN: diff %t.normal.dump %t.d4.dump
 
 // RUN: %clang_pgogen -o %t -g -mllvm --debug-info-correlate -mllvm --disable-vp=true %S/../Inputs/instrprof-debug-info-correlate-main.cpp %S/../Inputs/instrprof-debug-info-correlate-foo.cpp
 // RUN: env LLVM_PROFILE_FILE=%t.proflite %run %t
 // RUN: llvm-profdata merge -o %t.profdata --debug-info=%t %t.proflite
 
-// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+// RUN: llvm-profdata show --all-functions --counts %t.normal.profdata > %t.normal2.dump
+// RUN: llvm-profdata show --all-functions --counts %t.profdata > %t.prof.dump
+// RUN: diff %t.normal2.dump %t.prof.dump
 
 // RUN: %clang_pgogen -o %t.cov -g -mllvm --debug-info-correlate -mllvm -pgo-function-entry-coverage -mllvm --disable-vp=true %S/../Inputs/instrprof-debug-info-correlate-main.cpp %S/../Inputs/instrprof-debug-info-correlate-foo.cpp
 // RUN: env LLVM_PROFILE_FILE=%t.cov.proflite %run %t.cov
@@ -23,7 +27,9 @@
 // RUN: env LLVM_PROFILE_FILE=%t.cov.profraw %run %t.cov.normal
 // RUN: llvm-profdata merge -o %t.cov.normal.profdata %t.cov.profraw
 
-// RUN: diff <(llvm-profdata show --all-functions --counts %t.cov.normal.profdata) <(llvm-profdata show --all-functions --counts %t.cov.profdata)
+// RUN: llvm-profdata show --all-functions --counts %t.cov.normal.profdata > %t.cov.normal.dump
+// RUN: llvm-profdata show --all-functions --counts %t.cov.profdata > %t.cov.dump
+// RUN: diff %t.cov.normal.dump %t.cov.dump
 
 // Test debug info correlate with online merging.
 
@@ -36,11 +42,17 @@
 // RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.proflite %run %t
 // RUN: llvm-profdata merge -o %t.profdata --debug-info=%t %t.profdir/
 
-// RUN: diff <(llvm-profdata show --all-functions --counts %t.normal.profdata) <(llvm-profdata show --all-functions --counts %t.profdata)
+
+// RUN: llvm-profdata show --all-functions --counts %t.normal.profdata > %t.normal3.dump
+// RUN: llvm-profdata show --all-functions --counts %t.profdata > %t.prof3.dump
+// RUN: diff %t.normal3.dump %t.prof3.dump
 
 // RUN: rm -rf %t.profdir && mkdir %t.profdir
 // RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.cov.proflite %run %t.cov
 // RUN: env LLVM_PROFILE_FILE=%t.profdir/%m.cov.proflite %run %t.cov
 // RUN: llvm-profdata merge -o %t.cov.profdata --debug-info=%t.cov %t.profdir/
 
-// RUN: diff <(llvm-profdata show --all-functions --counts %t.cov.normal.profdata) <(llvm-profdata show --all-functions --counts %t.cov.profdata)
+// RUN: llvm-profdata show --all-functions --counts %t.cov.normal.profdata > %t.cov.normal2.dump
+// RUN: llvm-profdata show --all-functions --counts %t.cov.profdata > %t.cov2.dump
+// RUN: diff %t.cov.normal2.dump %t.cov2.dump
+