Use count instead of grep -c

[• rafael]

Summary

Using count is more common in llvm and avoids a subshell.

[filcab]

LGTM

compiler-rt/test/asan/TestCases/Posix/halt_on_error-torture.cc

 // Stress test recovery mode with many threads.
 //
 // RUN: %clangxx_asan -fsanitize-recover=address -pthread %s -o %t
 //
 // RUN: rm -f 1.txt
 // RUN: %env_asan_opts=halt_on_error=false:suppress_equal_pcs=false %run %t 1 10 >>1.txt 2>&1
 // RUN: FileCheck %s < 1.txt
-// RUN: [ $(grep -c 'ERROR: AddressSanitizer: use-after-poison' 1.txt) -eq 10 ]
+// RUN: grep 'ERROR: AddressSanitizer: use-after-poison' 1.txt | count 10
 // RUN: FileCheck --check-prefix=CHECK-NO-COLLISION %s < 1.txt
 //
 // Collisions are unlikely but still possible so we need the ||.
 // RUN: rm -f 10.txt
 // RUN: %env_asan_opts=halt_on_error=false:suppress_equal_pcs=false %run %t 10 20 >>10.txt 2>&1 || true
 // RUN: FileCheck --check-prefix=CHECK-COLLISION %s < 10.txt || FileCheck --check-prefix=CHECK-NO-COLLISION %s < 10.txt
 //
 // Collisions are unlikely but still possible so we need the ||.

compiler-rt/test/asan/TestCases/Posix/halt_on_error_suppress_equal_pcs.cc

 // Test reports dedupication for recovery mode.
 //
 // RUN: %clang_asan -fsanitize-recover=address %s -o %t
 //
 // Check for reports dedupication.
 // RUN: %env_asan_opts=halt_on_error=false %run %t 2>&1 | FileCheck %s
 //
 // Check that we die after reaching different reports number threshold.
 // RUN: rm -f %t1.log
 // RUN: %env_asan_opts=halt_on_error=false not %run %t 1 >> %t1.log 2>&1
-// RUN: [ $(grep -c 'ERROR: AddressSanitizer: stack-buffer-overflow' %t1.log) -eq 25 ]
+// RUN: grep 'ERROR: AddressSanitizer: stack-buffer-overflow' %t1.log | count 25
 //
 // Check suppress_equal_pcs=true behavior is equal to default one.
 // RUN: %env_asan_opts=halt_on_error=false:suppress_equal_pcs=true %run %t 2>&1 | FileCheck %s
 //
 // Check suppress_equal_pcs=false behavior isn't equal to default one.
 // RUN: rm -f %t2.log
 // RUN: %env_asan_opts=halt_on_error=false:suppress_equal_pcs=false %run %t >> %t2.log 2>&1
-// RUN: [ $(grep -c 'ERROR: AddressSanitizer: stack-buffer-overflow' %t2.log) -eq 30 ]
+// RUN: grep 'ERROR: AddressSanitizer: stack-buffer-overflow' %t2.log | count 30
 
 #define ACCESS_ARRAY_FIVE_ELEMENTS(array, i)     \
   array[i] = i;                                  \
   array[i + 1] = i + 1;                          \
   array[i + 2] = i + 2;                          \
   array[i + 3] = i + 3;                          \
   array[i + 4] = i + 4;                          \