mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-29 22:30:33 +00:00
288 lines
10 KiB
LLVM
288 lines
10 KiB
LLVM
; RUN: opt -loop-accesses -analyze < %s | FileCheck %s
|
|
|
|
target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
|
|
target triple = "aarch64--linux-gnueabi"
|
|
|
|
; 3 reads and 3 writes should need 12 memchecks
|
|
; CHECK: function 'testf':
|
|
; CHECK: Memory dependences are safe with run-time checks
|
|
|
|
; Memory dependencies have labels starting from 0, so in
|
|
; order to verify that we have n checks, we look for
|
|
; (n-1): and not n:.
|
|
|
|
; CHECK: Run-time memory checks:
|
|
; CHECK-NEXT: Check 0:
|
|
; CHECK: Check 11:
|
|
; CHECK-NOT: Check 12:
|
|
|
|
define void @testf(i16* %a,
|
|
i16* %b,
|
|
i16* %c,
|
|
i16* %d,
|
|
i16* %e,
|
|
i16* %f) {
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
|
|
|
|
%add = add nuw nsw i64 %ind, 1
|
|
|
|
%arrayidxA = getelementptr inbounds i16, i16* %a, i64 %ind
|
|
%loadA = load i16, i16* %arrayidxA, align 2
|
|
|
|
%arrayidxB = getelementptr inbounds i16, i16* %b, i64 %ind
|
|
%loadB = load i16, i16* %arrayidxB, align 2
|
|
|
|
%arrayidxC = getelementptr inbounds i16, i16* %c, i64 %ind
|
|
%loadC = load i16, i16* %arrayidxC, align 2
|
|
|
|
%mul = mul i16 %loadB, %loadA
|
|
%mul1 = mul i16 %mul, %loadC
|
|
|
|
%arrayidxD = getelementptr inbounds i16, i16* %d, i64 %ind
|
|
store i16 %mul1, i16* %arrayidxD, align 2
|
|
|
|
%arrayidxE = getelementptr inbounds i16, i16* %e, i64 %ind
|
|
store i16 %mul, i16* %arrayidxE, align 2
|
|
|
|
%arrayidxF = getelementptr inbounds i16, i16* %f, i64 %ind
|
|
store i16 %mul1, i16* %arrayidxF, align 2
|
|
|
|
%exitcond = icmp eq i64 %add, 20
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|
|
|
|
; The following (testg and testh) check that we can group
|
|
; memory checks of accesses which differ by a constant value.
|
|
; Both tests are based on the following C code:
|
|
;
|
|
; void testh(short *a, short *b, short *c) {
|
|
; unsigned long ind = 0;
|
|
; for (unsigned long ind = 0; ind < 20; ++ind) {
|
|
; c[2 * ind] = a[ind] * a[ind + 1];
|
|
; c[2 * ind + 1] = a[ind] * a[ind + 1] * b[ind];
|
|
; }
|
|
; }
|
|
;
|
|
; It is sufficient to check the intervals
|
|
; [a, a + 21], [b, b + 20] against [c, c + 41].
|
|
|
|
; 3 reads and 2 writes - two of the reads can be merged,
|
|
; and the writes can be merged as well. This gives us a
|
|
; total of 2 memory checks.
|
|
|
|
; CHECK: function 'testg':
|
|
|
|
; CHECK: Run-time memory checks:
|
|
; CHECK-NEXT: Check 0:
|
|
; CHECK-NEXT: Comparing group ([[ZERO:.+]]):
|
|
; CHECK-NEXT: %arrayidxC1 = getelementptr inbounds i16, i16* %c, i64 %store_ind_inc
|
|
; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %store_ind
|
|
; CHECK-NEXT: Against group ([[ONE:.+]]):
|
|
; CHECK-NEXT: %arrayidxA1 = getelementptr inbounds i16, i16* %a, i64 %add
|
|
; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %ind
|
|
; CHECK-NEXT: Check 1:
|
|
; CHECK-NEXT: Comparing group ({{.*}}[[ZERO]]):
|
|
; CHECK-NEXT: %arrayidxC1 = getelementptr inbounds i16, i16* %c, i64 %store_ind_inc
|
|
; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %store_ind
|
|
; CHECK-NEXT: Against group ([[TWO:.+]]):
|
|
; CHECK-NEXT: %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %ind
|
|
; CHECK-NEXT: Grouped accesses:
|
|
; CHECK-NEXT: Group {{.*}}[[ZERO]]:
|
|
; CHECK-NEXT: (Low: %c High: (78 + %c))
|
|
; CHECK-NEXT: Member: {(2 + %c),+,4}
|
|
; CHECK-NEXT: Member: {%c,+,4}
|
|
; CHECK-NEXT: Group {{.*}}[[ONE]]:
|
|
; CHECK-NEXT: (Low: %a High: (40 + %a))
|
|
; CHECK-NEXT: Member: {(2 + %a),+,2}
|
|
; CHECK-NEXT: Member: {%a,+,2}
|
|
; CHECK-NEXT: Group {{.*}}[[TWO]]:
|
|
; CHECK-NEXT: (Low: %b High: (38 + %b))
|
|
; CHECK-NEXT: Member: {%b,+,2}
|
|
|
|
define void @testg(i16* %a,
|
|
i16* %b,
|
|
i16* %c) {
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
|
|
%store_ind = phi i64 [ 0, %entry ], [ %store_ind_next, %for.body ]
|
|
|
|
%add = add nuw nsw i64 %ind, 1
|
|
%store_ind_inc = add nuw nsw i64 %store_ind, 1
|
|
%store_ind_next = add nuw nsw i64 %store_ind_inc, 1
|
|
|
|
%arrayidxA = getelementptr inbounds i16, i16* %a, i64 %ind
|
|
%loadA = load i16, i16* %arrayidxA, align 2
|
|
|
|
%arrayidxA1 = getelementptr inbounds i16, i16* %a, i64 %add
|
|
%loadA1 = load i16, i16* %arrayidxA1, align 2
|
|
|
|
%arrayidxB = getelementptr inbounds i16, i16* %b, i64 %ind
|
|
%loadB = load i16, i16* %arrayidxB, align 2
|
|
|
|
%mul = mul i16 %loadA, %loadA1
|
|
%mul1 = mul i16 %mul, %loadB
|
|
|
|
%arrayidxC = getelementptr inbounds i16, i16* %c, i64 %store_ind
|
|
store i16 %mul1, i16* %arrayidxC, align 2
|
|
|
|
%arrayidxC1 = getelementptr inbounds i16, i16* %c, i64 %store_ind_inc
|
|
store i16 %mul, i16* %arrayidxC1, align 2
|
|
|
|
%exitcond = icmp eq i64 %add, 20
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|
|
|
|
; 3 reads and 2 writes - the writes can be merged into a single
|
|
; group, but the GEPs used for the reads are not marked as inbounds.
|
|
; We can still merge them because we are using a unit stride for
|
|
; accesses, so we cannot overflow the GEPs.
|
|
|
|
; CHECK: function 'testh':
|
|
; CHECK: Run-time memory checks:
|
|
; CHECK-NEXT: Check 0:
|
|
; CHECK-NEXT: Comparing group ([[ZERO:.+]]):
|
|
; CHECK-NEXT: %arrayidxC1 = getelementptr inbounds i16, i16* %c, i64 %store_ind_inc
|
|
; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %store_ind
|
|
; CHECK-NEXT: Against group ([[ONE:.+]]):
|
|
; CHECK-NEXT: %arrayidxA1 = getelementptr i16, i16* %a, i64 %add
|
|
; CHECK-NEXT: %arrayidxA = getelementptr i16, i16* %a, i64 %ind
|
|
; CHECK-NEXT: Check 1:
|
|
; CHECK-NEXT: Comparing group ({{.*}}[[ZERO]]):
|
|
; CHECK-NEXT: %arrayidxC1 = getelementptr inbounds i16, i16* %c, i64 %store_ind_inc
|
|
; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %store_ind
|
|
; CHECK-NEXT: Against group ([[TWO:.+]]):
|
|
; CHECK-NEXT: %arrayidxB = getelementptr i16, i16* %b, i64 %ind
|
|
; CHECK-NEXT: Grouped accesses:
|
|
; CHECK-NEXT: Group {{.*}}[[ZERO]]:
|
|
; CHECK-NEXT: (Low: %c High: (78 + %c))
|
|
; CHECK-NEXT: Member: {(2 + %c),+,4}
|
|
; CHECK-NEXT: Member: {%c,+,4}
|
|
; CHECK-NEXT: Group {{.*}}[[ONE]]:
|
|
; CHECK-NEXT: (Low: %a High: (40 + %a))
|
|
; CHECK-NEXT: Member: {(2 + %a),+,2}
|
|
; CHECK-NEXT: Member: {%a,+,2}
|
|
; CHECK-NEXT: Group {{.*}}[[TWO]]:
|
|
; CHECK-NEXT: (Low: %b High: (38 + %b))
|
|
; CHECK-NEXT: Member: {%b,+,2}
|
|
|
|
define void @testh(i16* %a,
|
|
i16* %b,
|
|
i16* %c) {
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
|
|
%store_ind = phi i64 [ 0, %entry ], [ %store_ind_next, %for.body ]
|
|
|
|
%add = add nuw nsw i64 %ind, 1
|
|
%store_ind_inc = add nuw nsw i64 %store_ind, 1
|
|
%store_ind_next = add nuw nsw i64 %store_ind_inc, 1
|
|
|
|
%arrayidxA = getelementptr i16, i16* %a, i64 %ind
|
|
%loadA = load i16, i16* %arrayidxA, align 2
|
|
|
|
%arrayidxA1 = getelementptr i16, i16* %a, i64 %add
|
|
%loadA1 = load i16, i16* %arrayidxA1, align 2
|
|
|
|
%arrayidxB = getelementptr i16, i16* %b, i64 %ind
|
|
%loadB = load i16, i16* %arrayidxB, align 2
|
|
|
|
%mul = mul i16 %loadA, %loadA1
|
|
%mul1 = mul i16 %mul, %loadB
|
|
|
|
%arrayidxC = getelementptr inbounds i16, i16* %c, i64 %store_ind
|
|
store i16 %mul1, i16* %arrayidxC, align 2
|
|
|
|
%arrayidxC1 = getelementptr inbounds i16, i16* %c, i64 %store_ind_inc
|
|
store i16 %mul, i16* %arrayidxC1, align 2
|
|
|
|
%exitcond = icmp eq i64 %add, 20
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|
|
|
|
; Don't merge pointers if we need to perform a check against a pointer
|
|
; to the same underlying object (doing so would emit a check that could be
|
|
; falsely invalidated) For example, in the following loop:
|
|
;
|
|
; for (i = 0; i < 5000; ++i)
|
|
; a[i + offset] = a[i] + a[i + 10000]
|
|
;
|
|
; we should not merge the intervals associated with the reads (0,5000) and
|
|
; (10000, 15000) into (0, 15000) as this will pottentially fail the check
|
|
; against the interval associated with the write.
|
|
;
|
|
; We cannot have this check unless ShouldRetryWithRuntimeCheck is set,
|
|
; and therefore the grouping algorithm would create a separate group for
|
|
; each pointer.
|
|
|
|
; CHECK: function 'testi':
|
|
; CHECK: Run-time memory checks:
|
|
; CHECK-NEXT: Check 0:
|
|
; CHECK-NEXT: Comparing group ([[ZERO:.+]]):
|
|
; CHECK-NEXT: %storeidx = getelementptr inbounds i16, i16* %a, i64 %store_ind
|
|
; CHECK-NEXT: Against group ([[ONE:.+]]):
|
|
; CHECK-NEXT: %arrayidxA1 = getelementptr i16, i16* %a, i64 %ind
|
|
; CHECK-NEXT: Check 1:
|
|
; CHECK-NEXT: Comparing group ({{.*}}[[ZERO]]):
|
|
; CHECK-NEXT: %storeidx = getelementptr inbounds i16, i16* %a, i64 %store_ind
|
|
; CHECK-NEXT: Against group ([[TWO:.+]]):
|
|
; CHECK-NEXT: %arrayidxA2 = getelementptr i16, i16* %a, i64 %ind2
|
|
; CHECK-NEXT: Grouped accesses:
|
|
; CHECK-NEXT: Group {{.*}}[[ZERO]]:
|
|
; CHECK-NEXT: (Low: ((2 * %offset) + %a) High: (9998 + (2 * %offset) + %a))
|
|
; CHECK-NEXT: Member: {((2 * %offset) + %a),+,2}<nsw><%for.body>
|
|
; CHECK-NEXT: Group {{.*}}[[ONE]]:
|
|
; CHECK-NEXT: (Low: %a High: (9998 + %a))
|
|
; CHECK-NEXT: Member: {%a,+,2}<%for.body>
|
|
; CHECK-NEXT: Group {{.*}}[[TWO]]:
|
|
; CHECK-NEXT: (Low: (20000 + %a) High: (29998 + %a))
|
|
; CHECK-NEXT: Member: {(20000 + %a),+,2}<%for.body>
|
|
|
|
define void @testi(i16* %a,
|
|
i64 %offset) {
|
|
entry:
|
|
br label %for.body
|
|
|
|
for.body: ; preds = %for.body, %entry
|
|
%ind = phi i64 [ 0, %entry ], [ %add, %for.body ]
|
|
%store_ind = phi i64 [ %offset, %entry ], [ %store_ind_inc, %for.body ]
|
|
|
|
%add = add nuw nsw i64 %ind, 1
|
|
%store_ind_inc = add nuw nsw i64 %store_ind, 1
|
|
|
|
%arrayidxA1 = getelementptr i16, i16* %a, i64 %ind
|
|
%ind2 = add nuw nsw i64 %ind, 10000
|
|
%arrayidxA2 = getelementptr i16, i16* %a, i64 %ind2
|
|
|
|
%loadA1 = load i16, i16* %arrayidxA1, align 2
|
|
%loadA2 = load i16, i16* %arrayidxA2, align 2
|
|
|
|
%addres = add i16 %loadA1, %loadA2
|
|
|
|
%storeidx = getelementptr inbounds i16, i16* %a, i64 %store_ind
|
|
store i16 %addres, i16* %storeidx, align 2
|
|
|
|
%exitcond = icmp eq i64 %add, 5000
|
|
br i1 %exitcond, label %for.end, label %for.body
|
|
|
|
for.end: ; preds = %for.body
|
|
ret void
|
|
}
|