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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=TEST12; 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=TEST23; 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=TEST34 5; This test is a copy of full-unroll-heuristics.ll but with the constant6; 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 %iv10 11; Otherwise, we should:12; TEST2-NOT: %array_const_idx = getelementptr inbounds { [9 x i32] }, ptr @known_constant, i64 0, i32 0, i64 %iv13 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 %iv16 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 1618 19define i32 @foo(ptr noalias nocapture readonly %src) {20entry:21 br label %loop22 23loop: ; preds = %loop, %entry24 %iv = phi i64 [ 0, %entry ], [ %inc, %loop ]25 %r = phi i32 [ 0, %entry ], [ %add, %loop ]26 %arrayidx = getelementptr inbounds i32, ptr %src, i64 %iv27 %src_element = load i32, ptr %arrayidx, align 428 %array_const_idx = getelementptr inbounds { [9 x i32] }, ptr @known_constant, i64 0, i32 0, i64 %iv29 %const_array_element = load i32, ptr %array_const_idx, align 430 %mul = mul nsw i32 %src_element, %const_array_element31 %add = add nsw i32 %mul, %r32 %inc = add nuw nsw i64 %iv, 133 %exitcond86.i = icmp eq i64 %inc, 934 br i1 %exitcond86.i, label %loop.end, label %loop35 36loop.end: ; preds = %loop37 %r.lcssa = phi i32 [ %r, %loop ]38 ret i32 %r.lcssa39}40