derek.holloway
7502bf64a4
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47 lines
1.7 KiB
LLVM
47 lines
1.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -p loop-unroll -unroll-full-max-count=0 -S %s | FileCheck %s
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declare void @foo()
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define void @test_peel_last_pointer_induction(ptr %src, i64 %offset) {
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; CHECK-LABEL: define void @test_peel_last_pointer_induction(
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; CHECK-SAME: ptr [[SRC:%.*]], i64 [[OFFSET:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: [[END:%.*]] = getelementptr i8, ptr [[SRC]], i64 [[OFFSET]]
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; CHECK-NEXT: br label %[[LOOP_HEADER:.*]]
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; CHECK: [[LOOP_HEADER]]:
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; CHECK-NEXT: [[PTR_IV:%.*]] = phi ptr [ [[SRC]], %[[ENTRY]] ], [ [[PTR_IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ]
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; CHECK-NEXT: [[PTR_IV_NEXT]] = getelementptr nusw i8, ptr [[PTR_IV]], i64 1
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; CHECK-NEXT: [[CMP3_NOT:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]
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; CHECK-NEXT: br i1 [[CMP3_NOT]], label %[[LOOP_LATCH]], label %[[THEN:.*]]
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; CHECK: [[THEN]]:
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; CHECK-NEXT: call void @foo()
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; CHECK-NEXT: br label %[[LOOP_LATCH]]
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; CHECK: [[LOOP_LATCH]]:
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; CHECK-NEXT: [[EC:%.*]] = icmp eq ptr [[PTR_IV_NEXT]], [[END]]
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; CHECK-NEXT: br i1 [[EC]], label %[[EXIT:.*]], label %[[LOOP_HEADER]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret void
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;
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entry:
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%end = getelementptr i8, ptr %src, i64 %offset
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br label %loop.header
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loop.header:
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%ptr.iv = phi ptr [ %src, %entry ], [ %ptr.iv.next, %loop.latch ]
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%ptr.iv.next = getelementptr nusw i8, ptr %ptr.iv, i64 1
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%cmp3.not = icmp eq ptr %ptr.iv.next, %end
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br i1 %cmp3.not, label %loop.latch, label %then
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then:
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call void @foo()
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br label %loop.latch
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loop.latch:
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%ec = icmp eq ptr %ptr.iv.next, %end
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br i1 %ec, label %exit, label %loop.header
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exit:
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ret void
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}
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