JIT: Enable strength reduction by default (#105131)

Author: jakobbotsch

src/coreclr/jit/compiler.cpp

@@ -5065,7 +5065,7 @@ void Compiler::compCompile(void** methodCodePtr, uint32_t* methodCodeSize, JitFl
         doAssertionProp           = doValueNum && (JitConfig.JitDoAssertionProp() != 0);
         doVNBasedIntrinExpansion  = doValueNum;
         doRangeAnalysis           = doAssertionProp && (JitConfig.JitDoRangeAnalysis() != 0);
-        doOptimizeIVs             = doValueNum && (JitConfig.JitDoOptimizeIVs() != 0);
+        doOptimizeIVs             = doAssertionProp && (JitConfig.JitDoOptimizeIVs() != 0);
         doVNBasedDeadStoreRemoval = doValueNum && (JitConfig.JitDoVNBasedDeadStoreRemoval() != 0);
 #endif // defined(OPT_CONFIG)
 

src/coreclr/jit/jitconfigvalues.h

@@ -773,7 +773,7 @@ RELEASE_CONFIG_INTEGER(JitEnableCrossBlockLocalAssertionProp, W("JitEnableCrossB
 RELEASE_CONFIG_INTEGER(JitDoReversePostOrderLayout, W("JitDoReversePostOrderLayout"), 1);
 
 // Enable strength reduction
-RELEASE_CONFIG_INTEGER(JitEnableStrengthReduction, W("JitEnableStrengthReduction"), 0)
+RELEASE_CONFIG_INTEGER(JitEnableStrengthReduction, W("JitEnableStrengthReduction"), 1)
 
 // JitFunctionFile: Name of a file that contains a list of functions. If the currently compiled function is in the
 // file, certain other JIT config variables will be active. If the currently compiled function is not in the file,