Fixing LLVM_SRC_ROOT asseertions in approx knob handling

llvm/projects/hpvm-tensor-rt/tensor_runtime/src/approx_knobs_utils.cc

@@ -7,7 +7,7 @@
 #include <string.h>
 
 #include "approx_knob_utils.h"
-
+#include "debug.h"
 
 
 PerfParams::PerfParams(){
@@ -25,16 +25,15 @@ PerfParams::PerfParams(int row1, int col1, int skip_offset1){
 
 
 PerfParamSet::PerfParamSet(){
-
+  
   char llvm_src_root[100];
-  strcpy(llvm_src_root, getenv("LLVM_SRC_ROOT"));  
-   
-  if (llvm_src_root == NULL){
+  char* env_str=  getenv("LLVM_SRC_ROOT");  
 
-    printf("ERROR: SET LLVM_SRC_ROOT \n");
-    abort();
+  if (env_str == NULL){
+    ERROR("ERROR: SET LLVM_SRC_ROOT \n");
   }
 
+  strcpy(llvm_src_root, env_str);  
   printf ("*LLVM_SRC_ROOT = %s", llvm_src_root);
 
   char* knobs_file_path = strcat(llvm_src_root, "/projects/hpvm-tensor-rt/autotuner/data/global_knobs.txt");
@@ -48,8 +47,7 @@ PerfParamSet::PerfParamSet(){
 
   while(std::getline(file, line)) {     // Read each line 
 
-    printf ("***** line === ", line);
-    
+    //printf ("***** line === %s ", line);  
     std::istringstream iss(line);
     std::string token;
     while(std::getline(iss, token, '\t')){   // Read each token in the line
@@ -118,14 +116,13 @@ SampParams::SampParams(int skip_rate1, int skip_offset1, float interpolation_id1
 SampParamSet::SampParamSet(){
 
   char llvm_src_root[100];
-  strcpy(llvm_src_root, getenv("LLVM_SRC_ROOT"));  
-  
-  if (llvm_src_root == NULL){
+  char* env_str=  getenv("LLVM_SRC_ROOT");  
 
-    printf("ERROR: SET LLVM_SRC_ROOT \n");
-    abort();
+  if (env_str == NULL){
+    ERROR("ERROR: SET LLVM_SRC_ROOT \n");
   }
 
+  strcpy(llvm_src_root, env_str);  
   printf ("* LLVM_SRC_ROOT = %s \n", llvm_src_root);
 
   char* knobs_file_path = strcat(llvm_src_root, "/projects/hpvm-tensor-rt/autotuner/data/global_knobs.txt");