1; RUN: opt < %s -S -passes=loop-unroll -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=10 -unroll-max-percent-threshold-boost=100 | FileCheck %s -check-prefix=TEST1 2; RUN: opt < %s -S -passes=loop-unroll -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=20 -unroll-max-percent-threshold-boost=200 | FileCheck %s -check-prefix=TEST2 3; RUN: opt < %s -S -passes=loop-unroll -unroll-max-iteration-count-to-analyze=1000 -unroll-threshold=20 -unroll-max-percent-threshold-boost=100 | FileCheck %s -check-prefix=TEST3 4 5; This test is a copy of full-unroll-heuristics.ll but with the constant 6; wrapped in an extra struct. This should not hinder the analysis. 7 8; If the absolute threshold is too low, we should not unroll: 9; TEST1: %array_const_idx = getelementptr inbounds { [9 x i32] }, ptr @known_constant, i64 0, i32 0, i64 %iv 10 11; Otherwise, we should: 12; TEST2-NOT: %array_const_idx = getelementptr inbounds { [9 x i32] }, ptr @known_constant, i64 0, i32 0, i64 %iv 13 14; If we do not boost threshold, the unroll will not happen: 15; TEST3: %array_const_idx = getelementptr inbounds { [9 x i32] }, ptr @known_constant, i64 0, i32 0, i64 %iv 16 17@known_constant = internal unnamed_addr constant { [9 x i32] } { [9 x i32] [i32 0, i32 -1, i32 0, i32 -1, i32 5, i32 -1, i32 0, i32 -1, i32 0] }, align 16 18 19define i32 @foo(ptr noalias nocapture readonly %src) { 20entry: 21 br label %loop 22 23loop: ; preds = %loop, %entry 24 %iv = phi i64 [ 0, %entry ], [ %inc, %loop ] 25 %r = phi i32 [ 0, %entry ], [ %add, %loop ] 26 %arrayidx = getelementptr inbounds i32, ptr %src, i64 %iv 27 %src_element = load i32, ptr %arrayidx, align 4 28 %array_const_idx = getelementptr inbounds { [9 x i32] }, ptr @known_constant, i64 0, i32 0, i64 %iv 29 %const_array_element = load i32, ptr %array_const_idx, align 4 30 %mul = mul nsw i32 %src_element, %const_array_element 31 %add = add nsw i32 %mul, %r 32 %inc = add nuw nsw i64 %iv, 1 33 %exitcond86.i = icmp eq i64 %inc, 9 34 br i1 %exitcond86.i, label %loop.end, label %loop 35 36loop.end: ; preds = %loop 37 %r.lcssa = phi i32 [ %r, %loop ] 38 ret i32 %r.lcssa 39} 40