[compiler-rt][test] Add env command to fix command not found errors in compiler-rt with lit internal shell (#105917)

There are several files in the compiler-rt subproject that have command
not found errors. This patch uses the `env` command to properly set the
environment variables correctly when using the lit internal shell.
fixes: #102395 
[This change is relevant [RFC] Enabling the lit internal shell by
Default](https://discourse.llvm.org/t/rfc-enabling-the-lit-internal-shell-by-default/80179)

Author: Harini0924

compiler-rt/test/nsan/Posix/tls_reuse.c

@@ -1,6 +1,6 @@
 /// The static TLS block is reused among by threads. The shadow is cleared.
 // RUN: %clang_nsan %s -o %t
-// RUN: NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 %run %t
+// RUN: env NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 %run %t
 
 #include <pthread.h>
 #include <stdio.h>

compiler-rt/test/nsan/nan.cpp

@@ -1,11 +1,11 @@
 // RUN: %clangxx_nsan -O0 -g %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s
 
 // RUN: %clangxx_nsan -O3 -g %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s
 
 // RUN: %clangxx_nsan -O0 -g %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=1 not %run %t
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=1 not %run %t
 
 #include <cmath>
 #include <cstdio>

compiler-rt/test/nsan/softmax.cpp

@@ -1,14 +1,14 @@
 // RUN: %clangxx_nsan -O0 -g -DSOFTMAX=softmax %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=0,log2_max_relative_error=19 %run %t 2>&1 | FileCheck %s
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0,log2_max_relative_error=19 %run %t 2>&1 | FileCheck %s
 
 // RUN: %clangxx_nsan -O3 -g -DSOFTMAX=softmax %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=0,log2_max_relative_error=19 %run %t 2>&1 | FileCheck %s
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0,log2_max_relative_error=19 %run %t 2>&1 | FileCheck %s
 
 // RUN: %clangxx_nsan -O0 -g -DSOFTMAX=stable_softmax %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=1,log2_max_relative_error=19 %run %t 
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=1,log2_max_relative_error=19 %run %t 
 
 // RUN: %clangxx_nsan -O3 -g -DSOFTMAX=stable_softmax %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=1,log2_max_relative_error=19 %run %t
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=1,log2_max_relative_error=19 %run %t
 
 #include<iostream>
 #include<vector>
@@ -51,4 +51,4 @@ int main() {
     // CHECK: WARNING: NumericalStabilitySanitizer: NaN detected
   }
   return 0;
-}
+}

compiler-rt/test/nsan/sum.cpp

@@ -1,14 +1,14 @@
 // RUN: %clangxx_nsan -O0 -mllvm -nsan-shadow-type-mapping=dqq -g -DSUM=NaiveSum -DFLT=float %s -o %t
-// RUN: NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 not %run %t 2>&1 | FileCheck %s
+// RUN: env NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 not %run %t 2>&1 | FileCheck %s
 
 // RUN: %clangxx_nsan -O3 -mllvm -nsan-shadow-type-mapping=dqq -g -DSUM=NaiveSum -DFLT=float %s -o %t
-// RUN: NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 not %run %t 2>&1 | FileCheck %s
+// RUN: env NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 not %run %t 2>&1 | FileCheck %s
 
 // RUN: %clangxx_nsan -O0 -mllvm -nsan-shadow-type-mapping=dqq -g -DSUM=KahanSum -DFLT=float %s -o %t
-// RUN: NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 %run %t
+// RUN: env NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 %run %t
 
 // RUN: %clangxx_nsan -O3 -mllvm -nsan-shadow-type-mapping=dqq -g -DSUM=KahanSum -DFLT=float %s -o %t
-// RUN: NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 %run %t
+// RUN: env NSAN_OPTIONS=halt_on_error=1,log2_max_relative_error=19 %run %t
 
 #include <chrono>
 #include <iostream>

compiler-rt/test/nsan/vec_sqrt_ext.cpp

@@ -1,7 +1,7 @@
 // RUN: %clangxx_nsan -O0 -g -mavx %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s
 // RUN: %clangxx_nsan -O3 -g -mavx %s -o %t
-// RUN: NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s
+// RUN: env NSAN_OPTIONS=check_nan=true,halt_on_error=0 %run %t 2>&1 | FileCheck %s
 #include <iostream>
 #include <cmath>
 
@@ -22,4 +22,4 @@ int main() {
     // CHECK: WARNING: NumericalStabilitySanitizer: NaN detected
   }
   return 0;
-}
+}