diff options
Diffstat (limited to 'llvm/test/Analysis/LoopAccessAnalysis')
3 files changed, 174 insertions, 6 deletions
diff --git a/llvm/test/Analysis/LoopAccessAnalysis/number-of-memchecks.ll b/llvm/test/Analysis/LoopAccessAnalysis/number-of-memchecks.ll index f9871c643c9..76c96abbe96 100644 --- a/llvm/test/Analysis/LoopAccessAnalysis/number-of-memchecks.ll +++ b/llvm/test/Analysis/LoopAccessAnalysis/number-of-memchecks.ll @@ -1,19 +1,20 @@ ; RUN: opt -loop-accesses -analyze < %s | FileCheck %s -; 3 reads and 3 writes should need 12 memchecks - 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 dependecies have labels starting from 0, so in + +; 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: 0: -; CHECK: 11: -; CHECK-NOT: 12: +; CHECK-NEXT: Check 0: +; CHECK: Check 11: +; CHECK-NOT: Check 12: define void @testf(i16* %a, i16* %b, @@ -56,3 +57,162 @@ for.body: ; preds = %for.body, %entry 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 0: +; CHECK-NEXT: %arrayidxA1 = getelementptr inbounds i16, i16* %a, i64 %add +; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %ind +; CHECK-NEXT: Against group 2: +; 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: Check 1: +; CHECK-NEXT: Comparing group 1: +; CHECK-NEXT: %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %ind +; CHECK-NEXT: Against group 2: +; 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: Grouped accesses: +; CHECK-NEXT: Group 0: +; CHECK-NEXT: (Low: %a High: (40 + %a)) +; CHECK-NEXT: Member: {(2 + %a),+,2} +; CHECK-NEXT: Member: {%a,+,2} +; CHECK-NEXT: Group 1: +; CHECK-NEXT: (Low: %b High: (38 + %b)) +; CHECK-NEXT: Member: {%b,+,2} +; CHECK-NEXT: Group 2: +; CHECK-NEXT: (Low: %c High: (78 + %c)) +; CHECK-NEXT: Member: {(2 + %c),+,4} +; CHECK-NEXT: Member: {%c,+,4} + +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 0: +; CHECK-NEXT: %arrayidxA1 = getelementptr i16, i16* %a, i64 %add +; CHECK-NEXT: %arrayidxA = getelementptr i16, i16* %a, i64 %ind +; CHECK-NEXT: Against group 2: +; 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: Check 1: +; CHECK-NEXT: Comparing group 1: +; CHECK-NEXT: %arrayidxB = getelementptr i16, i16* %b, i64 %ind +; CHECK-NEXT: Against group 2: +; 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: Grouped accesses: +; CHECK-NEXT: Group 0: +; CHECK-NEXT: (Low: %a High: (40 + %a)) +; CHECK-NEXT: Member: {(2 + %a),+,2} +; CHECK-NEXT: Member: {%a,+,2} +; CHECK-NEXT: Group 1: +; CHECK-NEXT: (Low: %b High: (38 + %b)) +; CHECK-NEXT: Member: {%b,+,2} +; CHECK-NEXT: Group 2: +; CHECK-NEXT: (Low: %c High: (78 + %c)) +; CHECK-NEXT: Member: {(2 + %c),+,4} +; CHECK-NEXT: Member: {%c,+,4} + +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 +} diff --git a/llvm/test/Analysis/LoopAccessAnalysis/resort-to-memchecks-only.ll b/llvm/test/Analysis/LoopAccessAnalysis/resort-to-memchecks-only.ll index 64f7729fa18..e7305173dd9 100644 --- a/llvm/test/Analysis/LoopAccessAnalysis/resort-to-memchecks-only.ll +++ b/llvm/test/Analysis/LoopAccessAnalysis/resort-to-memchecks-only.ll @@ -15,7 +15,9 @@ target triple = "x86_64-apple-macosx10.10.0" ; CHECK-NEXT: Interesting Dependences: ; CHECK-NEXT: Run-time memory checks: ; CHECK-NEXT: 0: +; CHECK-NEXT: Comparing group ; CHECK-NEXT: %arrayidxA2 = getelementptr inbounds i16, i16* %a, i64 %idx +; CHECK-NEXT: Against group ; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %indvar @B = common global i16* null, align 8 diff --git a/llvm/test/Analysis/LoopAccessAnalysis/unsafe-and-rt-checks.ll b/llvm/test/Analysis/LoopAccessAnalysis/unsafe-and-rt-checks.ll index ce8b86ba2c5..237cbc8b987 100644 --- a/llvm/test/Analysis/LoopAccessAnalysis/unsafe-and-rt-checks.ll +++ b/llvm/test/Analysis/LoopAccessAnalysis/unsafe-and-rt-checks.ll @@ -14,10 +14,16 @@ target triple = "x86_64-apple-macosx10.10.0" ; CHECK-NEXT: store i16 %mul1, i16* %arrayidxA_plus_2, align 2 ; CHECK: Run-time memory checks: ; CHECK-NEXT: 0: +; CHECK-NEXT: Comparing group +; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3 ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add +; CHECK-NEXT: Against group ; CHECK-NEXT: %arrayidxB = getelementptr inbounds i16, i16* %b, i64 %storemerge3 ; CHECK-NEXT: 1: +; CHECK-NEXT: Comparing group +; CHECK-NEXT: %arrayidxA = getelementptr inbounds i16, i16* %a, i64 %storemerge3 ; CHECK-NEXT: %arrayidxA_plus_2 = getelementptr inbounds i16, i16* %a, i64 %add +; CHECK-NEXT: Against group ; CHECK-NEXT: %arrayidxC = getelementptr inbounds i16, i16* %c, i64 %storemerge3 @B = common global i16* null, align 8 |
