Nov 12, 2020 · Oct 28, 2020 · Oct 28, 2020 · Oct 28, 2020 · Nov 9, 2020 · Nov 9, 2020
diff --git a/src/coreclr/src/jit/optimizer.cpp b/src/coreclr/src/jit/optimizer.cpp
        // LPFLG_CONST - required because this transform only handles full unrolls
        requiredFlags = LPFLG_DO_WHILE | LPFLG_CONST;

 #ifdef DEBUG
        if (compStressCompile(STRESS_UNROLL_LOOPS, 50))
        {
            // In stress mode, quadruple the size limit, and drop
            // the restriction that loop limit must be vector element count.

            unrollLimitSz *= 4;
        }
 #endif

        /* Ignore the loop if we don't have a do-while
        that has a constant number of iterations */

            continue;
        }

 #ifdef DEBUG
        if (compStressCompile(STRESS_UNROLL_LOOPS, 50))
        {
            // In stress mode, quadruple the size limit, and drop
            // the restriction that loop limit must be vector element count.

            unrollLimitSz *= 4;
        }
        else
 #endif
        // Unroll only if limit is 0, 1, or Vector_.Length (as a heuristic, not for correctness/structural reasons)
        if ((totalIter > 1) &&!(loopFlags & LPFLG_SIMD_LIMIT) && !compStressCompile(STRESS_UNROLL_LOOPS, 50))
        if (!(loopFlags & LPFLG_SIMD_LIMIT))
        {
            continue;
            if (totalIter <= 1)
            {
                unrollLimitSz *= 4;
            }
            else
            {
                continue;
            }
        }

        GenTree* incr = incrStmt->GetRootNode();
Original file line number	Diff line number	Diff line change
Expand Up		@@ -3548,16 +3548,6 @@ void Compiler::optUnrollLoops()
		// LPFLG_CONST - required because this transform only handles full unrolls
		requiredFlags = LPFLG_DO_WHILE \| LPFLG_CONST;

		#ifdef DEBUG
		if (compStressCompile(STRESS_UNROLL_LOOPS, 50))
		{
		// In stress mode, quadruple the size limit, and drop
		// the restriction that loop limit must be vector element count.

		unrollLimitSz *= 4;
		}
		#endif

		/* Ignore the loop if we don't have a do-while
		that has a constant number of iterations */

Expand DownExpand Up		@@ -3645,10 +3635,27 @@ void Compiler::optUnrollLoops()
		continue;
		}

		#ifdef DEBUG
		if (compStressCompile(STRESS_UNROLL_LOOPS, 50))
		{
		// In stress mode, quadruple the size limit, and drop
		// the restriction that loop limit must be vector element count.

		unrollLimitSz *= 4;
		}
		else
		#endif
		// Unroll only if limit is 0, 1, or Vector_.Length (as a heuristic, not for correctness/structural reasons)
		if ((totalIter > 1) &&!(loopFlags & LPFLG_SIMD_LIMIT) && !compStressCompile(STRESS_UNROLL_LOOPS, 50))
		if (!(loopFlags & LPFLG_SIMD_LIMIT))
		{
		continue;
		if (totalIter <= 1)
		{
		unrollLimitSz *= 4;
		}
		else
		{
		continue;
		}
		}

		GenTree* incr = incrStmt->GetRootNode();
Expand Down