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| ; RUN: opt < %s -S -loop-unroll -unroll-runtime -unroll-threshold=40 -unroll-max-percent-threshold-boost=100 | FileCheck %s
@known_constant = internal unnamed_addr constant [9 x i32] [i32 0, i32 -1, i32 0, i32 -1, i32 5, i32 -1, i32 0, i32 -1, i32 0], align 16
; CHECK-LABEL: @bar_prof
; CHECK: loop:
; CHECK: %mul = mul
; CHECK: %mul.1 = mul
; CHECK: %mul.2 = mul
; CHECK: %mul.3 = mul
; CHECK: loop.epil:
define i32 @bar_prof(i32* noalias nocapture readonly %src, i64 %c) !prof !1 {
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %inc, %loop ]
%r = phi i32 [ 0, %entry ], [ %add, %loop ]
%arrayidx = getelementptr inbounds i32, i32* %src, i64 %iv
%src_element = load i32, i32* %arrayidx, align 4
%array_const_idx = getelementptr inbounds [9 x i32], [9 x i32]* @known_constant, i64 0, i64 %iv
%const_array_element = load i32, i32* %array_const_idx, align 4
%mul = mul nsw i32 %src_element, %const_array_element
%add = add nsw i32 %mul, %r
%inc = add nuw nsw i64 %iv, 1
%exitcond86.i = icmp eq i64 %inc, %c
br i1 %exitcond86.i, label %loop.end, label %loop, !prof !2
loop.end:
%r.lcssa = phi i32 [ %r, %loop ]
ret i32 %r.lcssa
}
; CHECK-LABEL: @bar_prof_flat
; CHECK-NOT: loop.epil
define i32 @bar_prof_flat(i32* noalias nocapture readonly %src, i64 %c) !prof !1 {
entry:
br label %loop
loop:
%iv = phi i64 [ 0, %entry ], [ %inc, %loop ]
%r = phi i32 [ 0, %entry ], [ %add, %loop ]
%arrayidx = getelementptr inbounds i32, i32* %src, i64 %iv
%src_element = load i32, i32* %arrayidx, align 4
%array_const_idx = getelementptr inbounds [9 x i32], [9 x i32]* @known_constant, i64 0, i64 %iv
%const_array_element = load i32, i32* %array_const_idx, align 4
%mul = mul nsw i32 %src_element, %const_array_element
%add = add nsw i32 %mul, %r
%inc = add nuw nsw i64 %iv, 1
%exitcond86.i = icmp eq i64 %inc, %c
br i1 %exitcond86.i, label %loop, label %loop.end, !prof !2
loop.end:
%r.lcssa = phi i32 [ %r, %loop ]
ret i32 %r.lcssa
}
!1 = !{!"function_entry_count", i64 1}
!2 = !{!"branch_weights", i32 1, i32 1000}
|