derek.holloway
7502bf64a4
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51 lines
1.5 KiB
LLVM
51 lines
1.5 KiB
LLVM
; REQUIRES: asserts
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; RUN: opt -p loop-vectorize -debug-only=loop-vectorize --disable-output -S %s 2>&1 | FileCheck %s
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; CHECK-LABEL: LV: Checking a loop in 'latch_exit_cannot_compute_btc_due_to_step'
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; CHECK: LV: Did not find one integer induction var.
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; CHECK-NEXT: LV: Not vectorizing: Cannot vectorize uncountable loop.
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; CHECK-NEXT: LV: Not vectorizing: Cannot prove legality.
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; CHECK-LABEL: LV: Checking a loop in 'header_exit_cannot_compute_btc_due_to_step'
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; CHECK: LV: Found an induction variable.
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; CHECK-NEXT: LV: Did not find one integer induction var.
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; CHECK-NEXT: LV: Not vectorizing: Cannot vectorize uncountable loop.
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; CHECK-NEXT: LV: Not vectorizing: Cannot prove legality.
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; CHECK-NOT: vector.body
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define void @latch_exit_cannot_compute_btc_due_to_step(ptr %dst, i64 %step) {
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entry:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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%iv.next = add i64 %iv, %step
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%gep = getelementptr i8, ptr %dst, i64 %iv
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store i8 0, ptr %gep, align 1
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%ec = icmp eq i64 %iv.next, 1000
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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 @header_exit_cannot_compute_btc_due_to_step(ptr %dst, i64 %step) {
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entry:
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br label %loop.header
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loop.header:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
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%iv.next = add i64 %iv, %step
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%ec = icmp eq i64 %iv.next, 1000
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br i1 %ec, label %loop.latch, label %exit
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loop.latch:
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%gep = getelementptr i8, ptr %dst, i64 %iv
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store i8 0, ptr %gep, align 1
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br label %loop.header
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exit:
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ret void
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}
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