90 lines
2.9 KiB
LLVM
90 lines
2.9 KiB
LLVM
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; RUN: opt < %s -analyze -enable-new-pm=0 -scalar-evolution -scalar-evolution-max-iterations=0 -scalar-evolution-classify-expressions=0 | FileCheck %s
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; RUN: opt < %s -disable-output "-passes=print<scalar-evolution>" -scalar-evolution-max-iterations=0 -scalar-evolution-classify-expressions=0 2>&1 | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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define void @max_backedge_taken_count_by_wrapping1_nsw_nuw(i8 %N, i8* %ptr) {
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; CHECK-LABEL: Determining loop execution counts for: @max_backedge_taken_count_by_wrapping1_nsw_nuw
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; CHECK-NEXT: Loop %loop: backedge-taken count is (%N /u 4)
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; CHECK-NEXT: Loop %loop: max backedge-taken count is 63
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; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (%N /u 4)
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;
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entry:
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br label %loop
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loop:
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%iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
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%gep = getelementptr i8, i8* %ptr, i8 %iv
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store i8 %iv, i8* %gep
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%iv.next = add nuw nsw i8 %iv, 4
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%ec = icmp ne i8 %iv, %N
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br i1 %ec, label %loop, label %exit
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exit:
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ret void
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}
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define void @max_backedge_taken_count_by_wrapping1_nuw(i8 %N, i8* %ptr) {
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; CHECK-LABEL: Determining loop execution counts for: @max_backedge_taken_count_by_wrapping1_nuw
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; CHECK-NEXT: Loop %loop: backedge-taken count is (%N /u 4)
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; CHECK-NEXT: Loop %loop: max backedge-taken count is 63
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; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is (%N /u 4)
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;
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entry:
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br label %loop
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loop:
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%iv = phi i8 [ 0, %entry ], [ %iv.next, %loop ]
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%gep = getelementptr i8, i8* %ptr, i8 %iv
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store i8 %iv, i8* %gep
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%iv.next = add nuw i8 %iv, 4
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%ec = icmp ne i8 %iv, %N
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br i1 %ec, label %loop, label %exit
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exit:
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ret void
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}
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define void @max_backedge_taken_count_by_wrapping2_nsw_nuw(i8 %N, i8* %ptr) {
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; CHECK-LABEL: Determining loop execution counts for: @max_backedge_taken_count_by_wrapping2
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; CHECK-NEXT: Loop %loop: backedge-taken count is ((-64 + %N) /u 4)
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; CHECK-NEXT: Loop %loop: max backedge-taken count is 63
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; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is ((-64 + %N) /u 4)
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;
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entry:
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br label %loop
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loop:
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%iv = phi i8 [ 64, %entry ], [ %iv.next, %loop ]
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%gep = getelementptr i8, i8* %ptr, i8 %iv
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store i8 %iv, i8* %gep
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%iv.next = add nuw nsw i8 %iv, 4
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%ec = icmp ne i8 %iv, %N
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br i1 %ec, label %loop, label %exit
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exit:
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ret void
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}
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define void @max_backedge_taken_count_by_wrapping2_nuw(i8 %N, i8* %ptr) {
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; CHECK-LABEL: Determining loop execution counts for: @max_backedge_taken_count_by_wrapping2
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; CHECK-NEXT: Loop %loop: backedge-taken count is ((-64 + %N) /u 4)
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; CHECK-NEXT: Loop %loop: max backedge-taken count is 63
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; CHECK-NEXT: Loop %loop: Predicated backedge-taken count is ((-64 + %N) /u 4)
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;
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entry:
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br label %loop
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loop:
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%iv = phi i8 [ 64, %entry ], [ %iv.next, %loop ]
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%gep = getelementptr i8, i8* %ptr, i8 %iv
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store i8 %iv, i8* %gep
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%iv.next = add nuw i8 %iv, 4
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%ec = icmp ne i8 %iv, %N
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br i1 %ec, label %loop, label %exit
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exit:
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ret void
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}
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