derek.holloway
7502bf64a4
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230 lines
8.2 KiB
LLVM
230 lines
8.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py UTC_ARGS: --version 4
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; RUN: opt -passes='print<access-info>' -disable-output %s 2>&1 | FileCheck %s
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target datalayout = "e-m:o-i64:64-i128:128-n32:64-S128"
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declare void @llvm.assume(i1)
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declare void @use(ptr noundef)
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; %offset is known positive via assume, so we should be able to detect the
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; forward dependence.
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define void @offset_i8_known_positive_via_assume_forward_dep_1(ptr %A, i64 %offset, i64 %N) {
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; CHECK-LABEL: 'offset_i8_known_positive_via_assume_forward_dep_1'
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; CHECK-NEXT: loop:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Forward:
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; CHECK-NEXT: %l = load i8, ptr %gep.off, align 4 ->
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; CHECK-NEXT: store i8 %add, ptr %gep, align 4
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; CHECK-EMPTY:
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; CHECK-NEXT: Run-time memory checks:
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; CHECK-NEXT: Grouped accesses:
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; CHECK-EMPTY:
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; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
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; CHECK-NEXT: SCEV assumptions:
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; CHECK-EMPTY:
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; CHECK-NEXT: Expressions re-written:
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;
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entry:
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%c = icmp sgt i64 %offset, 0
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call void @llvm.assume(i1 %c)
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%off = getelementptr inbounds i8, ptr %A, i64 %offset
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call void @use(ptr noundef %off)
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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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%gep.off = getelementptr inbounds i8, ptr %off, i64 %iv
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%l = load i8 , ptr %gep.off, align 4
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%add = add nsw i8 %l, 5
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%gep = getelementptr inbounds i8, ptr %A, i64 %iv
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store i8 %add, ptr %gep, align 4
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond.not = icmp eq i64 %iv.next, %N
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br i1 %exitcond.not, label %exit, label %loop
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exit:
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ret void
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}
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define void @offset_i32_known_positive_via_assume_forward_dep_1(ptr %A, i64 %offset, i64 %N) {
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; CHECK-LABEL: 'offset_i32_known_positive_via_assume_forward_dep_1'
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; CHECK-NEXT: loop:
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; CHECK-NEXT: Memory dependences are safe with run-time checks
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Run-time memory checks:
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; CHECK-NEXT: Check 0:
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; CHECK-NEXT: Comparing group GRP0:
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; CHECK-NEXT: %gep = getelementptr inbounds i32, ptr %A, i64 %iv
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; CHECK-NEXT: Against group GRP1:
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; CHECK-NEXT: %gep.off = getelementptr inbounds i32, ptr %off, i64 %iv
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; CHECK-NEXT: Grouped accesses:
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; CHECK-NEXT: Group GRP0:
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; CHECK-NEXT: (Low: %A High: (-3 + (4 * %N) + %A))
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; CHECK-NEXT: Member: {%A,+,4}<nuw><%loop>
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; CHECK-NEXT: Group GRP1:
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; CHECK-NEXT: (Low: ((4 * %offset)<nsw> + %A) High: (-3 + (4 * %offset)<nsw> + (4 * %N) + %A))
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; CHECK-NEXT: Member: {((4 * %offset)<nsw> + %A),+,4}<nw><%loop>
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; CHECK-EMPTY:
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; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
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; CHECK-NEXT: SCEV assumptions:
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; CHECK-EMPTY:
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; CHECK-NEXT: Expressions re-written:
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;
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entry:
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%c = icmp sgt i64 %offset, 0
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call void @llvm.assume(i1 %c)
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%off = getelementptr inbounds i32, ptr %A, i64 %offset
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call void @use(ptr noundef %off)
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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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%gep.off = getelementptr inbounds i32, ptr %off, i64 %iv
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%l = load i8 , ptr %gep.off, align 4
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%add = add nsw i8 %l, 5
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%gep = getelementptr inbounds i32, ptr %A, i64 %iv
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store i8 %add, ptr %gep, align 4
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond.not = icmp eq i64 %iv.next, %N
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br i1 %exitcond.not, label %exit, label %loop
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exit:
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ret void
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}
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; %offset is known positive via assume, so we should be able to detect the
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; forward dependence.
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define void @offset_known_positive_via_assume_forward_dep_2(ptr %A, i64 %offset, i64 %N) {
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; CHECK-LABEL: 'offset_known_positive_via_assume_forward_dep_2'
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; CHECK-NEXT: loop:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Forward:
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; CHECK-NEXT: %l = load i32, ptr %gep.off, align 4 ->
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; CHECK-NEXT: store i32 %add, ptr %gep, align 4
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; CHECK-EMPTY:
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; CHECK-NEXT: Run-time memory checks:
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; CHECK-NEXT: Grouped accesses:
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; CHECK-EMPTY:
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; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
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; CHECK-NEXT: SCEV assumptions:
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; CHECK-EMPTY:
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; CHECK-NEXT: Expressions re-written:
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;
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entry:
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%c = icmp sgt i64 %offset, 0
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call void @llvm.assume(i1 %c)
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%c.2 = icmp slt i64 %offset, 20
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call void @llvm.assume(i1 %c.2)
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%off = getelementptr inbounds i32, ptr %A, i64 %offset
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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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%gep.off = getelementptr inbounds i32, ptr %off, i64 %iv
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%l = load i32, ptr %gep.off, align 4
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%add = add nsw i32 %l, 5
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%gep = getelementptr inbounds i32, ptr %A, i64 %iv
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store i32 %add, ptr %gep, align 4
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond.not = icmp eq i64 %iv.next, %N
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br i1 %exitcond.not, label %exit, label %loop
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exit:
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ret void
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}
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; The range of %offset is known via assumes, but it may be positive or negative.
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define void @offset_may_be_negative_via_assume_unknown_dep(ptr %A, i64 %offset, i64 %N) {
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; CHECK-LABEL: 'offset_may_be_negative_via_assume_unknown_dep'
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; CHECK-NEXT: loop:
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; CHECK-NEXT: Memory dependences are safe with run-time checks
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Run-time memory checks:
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; CHECK-NEXT: Check 0:
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; CHECK-NEXT: Comparing group GRP0:
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; CHECK-NEXT: %gep.mul.2 = getelementptr inbounds i32, ptr %A, i64 %iv
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; CHECK-NEXT: Against group GRP1:
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; CHECK-NEXT: %gep = getelementptr inbounds i32, ptr %off, i64 %iv
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; CHECK-NEXT: Grouped accesses:
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; CHECK-NEXT: Group GRP0:
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; CHECK-NEXT: (Low: %A High: ((4 * %N) + %A))
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; CHECK-NEXT: Member: {%A,+,4}<nuw><%loop>
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; CHECK-NEXT: Group GRP1:
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; CHECK-NEXT: (Low: ((4 * %offset)<nsw> + %A) High: ((4 * %offset)<nsw> + (4 * %N) + %A))
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; CHECK-NEXT: Member: {((4 * %offset)<nsw> + %A),+,4}<nw><%loop>
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; CHECK-EMPTY:
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; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
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; CHECK-NEXT: SCEV assumptions:
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; CHECK-EMPTY:
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; CHECK-NEXT: Expressions re-written:
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;
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entry:
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%c = icmp sgt i64 %offset, -4
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call void @llvm.assume(i1 %c)
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%c.2 = icmp slt i64 %offset, 20
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call void @llvm.assume(i1 %c.2)
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%off = getelementptr inbounds i32, ptr %A, i64 %offset
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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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%gep = getelementptr inbounds i32, ptr %off, i64 %iv
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%l = load i32, ptr %gep, align 4
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%add = add nsw i32 %l, 5
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%gep.mul.2 = getelementptr inbounds i32, ptr %A, i64 %iv
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store i32 %add, ptr %gep.mul.2, align 4
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond.not = icmp eq i64 %iv.next, %N
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br i1 %exitcond.not, label %exit, label %loop
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exit:
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ret void
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}
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define void @offset_no_assumes(ptr %A, i64 %offset, i64 %N) {
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; CHECK-LABEL: 'offset_no_assumes'
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; CHECK-NEXT: loop:
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; CHECK-NEXT: Memory dependences are safe with run-time checks
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Run-time memory checks:
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; CHECK-NEXT: Check 0:
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; CHECK-NEXT: Comparing group GRP0:
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; CHECK-NEXT: %gep = getelementptr inbounds i32, ptr %A, i64 %iv
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; CHECK-NEXT: Against group GRP1:
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; CHECK-NEXT: %gep.off = getelementptr inbounds i32, ptr %off, i64 %iv
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; CHECK-NEXT: Grouped accesses:
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; CHECK-NEXT: Group GRP0:
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; CHECK-NEXT: (Low: %A High: ((4 * %N) + %A))
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; CHECK-NEXT: Member: {%A,+,4}<nuw><%loop>
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; CHECK-NEXT: Group GRP1:
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; CHECK-NEXT: (Low: ((4 * %offset)<nsw> + %A) High: ((4 * %offset)<nsw> + (4 * %N) + %A))
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; CHECK-NEXT: Member: {((4 * %offset)<nsw> + %A),+,4}<nw><%loop>
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; CHECK-EMPTY:
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; CHECK-NEXT: Non vectorizable stores to invariant address were not found in loop.
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; CHECK-NEXT: SCEV assumptions:
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; CHECK-EMPTY:
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; CHECK-NEXT: Expressions re-written:
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;
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entry:
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%off = getelementptr inbounds i32, ptr %A, i64 %offset
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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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%gep.off = getelementptr inbounds i32, ptr %off, i64 %iv
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%l = load i32, ptr %gep.off, align 4
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%add = add nsw i32 %l, 5
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%gep = getelementptr inbounds i32, ptr %A, i64 %iv
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store i32 %add, ptr %gep, align 4
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%iv.next = add nuw nsw i64 %iv, 1
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%exitcond.not = icmp eq i64 %iv.next, %N
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br i1 %exitcond.not, label %exit, label %loop
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exit:
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ret void
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}
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