555e09c2b0
This updates the naming for the LAA printing pass to be in line with most other analysis printing passes. The old name has come up as confusing multiple times already, e.g. in D131924.
548 lines
19 KiB
LLVM
548 lines
19 KiB
LLVM
; RUN: opt -passes='print<access-info>' -disable-output < %s 2>&1 | FileCheck %s
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target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
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; Following cases are no dependence.
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; void nodep_Read_Write(int *A) {
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; int *B = A + 1;
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; for (unsigned i = 0; i < 1024; i+=3)
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; B[i] = A[i] + 1;
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; }
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; CHECK: function 'nodep_Read_Write':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Run-time memory checks:
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define void @nodep_Read_Write(i32* nocapture %A) {
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entry:
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%add.ptr = getelementptr inbounds i32, i32* %A, i64 1
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, 1
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%arrayidx2 = getelementptr inbounds i32, i32* %add.ptr, i64 %indvars.iv
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store i32 %add, i32* %arrayidx2, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 3
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; int nodep_Write_Read(int *A) {
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; int sum = 0;
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; for (unsigned i = 0; i < 1024; i+=4) {
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; A[i] = i;
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; sum += A[i+3];
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; }
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;
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; return sum;
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; }
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; CHECK: function 'nodep_Write_Read':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Run-time memory checks:
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define i32 @nodep_Write_Read(i32* nocapture %A) {
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret i32 %add3
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%sum.013 = phi i32 [ 0, %entry ], [ %add3, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%0 = trunc i64 %indvars.iv to i32
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store i32 %0, i32* %arrayidx, align 4
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%1 = or i64 %indvars.iv, 3
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%arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %1
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%2 = load i32, i32* %arrayidx2, align 4
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%add3 = add nsw i32 %2, %sum.013
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 4
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; void nodep_Write_Write(int *A) {
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; for (unsigned i = 0; i < 1024; i+=2) {
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; A[i] = i;
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; A[i+1] = i+1;
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; }
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; }
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; CHECK: function 'nodep_Write_Write':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Run-time memory checks:
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define void @nodep_Write_Write(i32* nocapture %A) {
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%0 = trunc i64 %indvars.iv to i32
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store i32 %0, i32* %arrayidx, align 4
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%1 = or i64 %indvars.iv, 1
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%arrayidx3 = getelementptr inbounds i32, i32* %A, i64 %1
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%2 = trunc i64 %1 to i32
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store i32 %2, i32* %arrayidx3, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; Following cases are unsafe depdences and are not vectorizable.
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; void unsafe_Read_Write(int *A) {
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; for (unsigned i = 0; i < 1024; i+=3)
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; A[i+3] = A[i] + 1;
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; }
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; CHECK: function 'unsafe_Read_Write':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Report: unsafe dependent memory operations in loop
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; CHECK-NEXT: Backward loop carried data dependence.
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Backward:
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; CHECK-NEXT: %0 = load i32, i32* %arrayidx, align 4 ->
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; CHECK-NEXT: store i32 %add, i32* %arrayidx3, align 4
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define void @unsafe_Read_Write(i32* nocapture %A) {
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%i.010 = phi i32 [ 0, %entry ], [ %add1, %for.body ]
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%idxprom = zext i32 %i.010 to i64
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %idxprom
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, 1
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%add1 = add i32 %i.010, 3
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%idxprom2 = zext i32 %add1 to i64
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%arrayidx3 = getelementptr inbounds i32, i32* %A, i64 %idxprom2
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store i32 %add, i32* %arrayidx3, align 4
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%cmp = icmp ult i32 %add1, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; int unsafe_Write_Read(int *A) {
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; int sum = 0;
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; for (unsigned i = 0; i < 1024; i+=4) {
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; A[i] = i;
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; sum += A[i+4];
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; }
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;
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; return sum;
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; }
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; CHECK: function 'unsafe_Write_Read':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Report: unsafe dependent memory operations in loop
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; CHECK-NEXT: Backward loop carried data dependence.
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Backward:
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; CHECK-NEXT: store i32 %0, i32* %arrayidx, align 4 ->
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; CHECK-NEXT: %1 = load i32, i32* %arrayidx2, align 4
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define i32 @unsafe_Write_Read(i32* nocapture %A) {
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret i32 %add3
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%sum.013 = phi i32 [ 0, %entry ], [ %add3, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%0 = trunc i64 %indvars.iv to i32
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store i32 %0, i32* %arrayidx, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 4
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%arrayidx2 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next
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%1 = load i32, i32* %arrayidx2, align 4
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%add3 = add nsw i32 %1, %sum.013
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; void unsafe_Write_Write(int *A) {
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; for (unsigned i = 0; i < 1024; i+=2) {
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; A[i] = i;
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; A[i+2] = i+1;
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; }
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; }
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; CHECK: function 'unsafe_Write_Write':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Report: unsafe dependent memory operations in loop
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; CHECK-NEXT: Backward loop carried data dependence.
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: Backward:
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; CHECK-NEXT: store i32 %0, i32* %arrayidx, align 4 ->
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; CHECK-NEXT: store i32 %2, i32* %arrayidx3, align 4
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define void @unsafe_Write_Write(i32* nocapture %A) {
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entry:
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%0 = trunc i64 %indvars.iv to i32
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store i32 %0, i32* %arrayidx, align 4
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%1 = or i64 %indvars.iv, 1
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%arrayidx3 = getelementptr inbounds i32, i32* %A, i64 %indvars.iv.next
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%2 = trunc i64 %1 to i32
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store i32 %2, i32* %arrayidx3, align 4
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; Following cases check that strided accesses can be vectorized.
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; void vectorizable_Read_Write(int *A) {
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; int *B = A + 4;
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; for (unsigned i = 0; i < 1024; i+=2)
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; B[i] = A[i] + 1;
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; }
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; CHECK: function 'vectorizable_Read_Write':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: BackwardVectorizable:
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; CHECK-NEXT: %0 = load i32, i32* %arrayidx, align 4 ->
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; CHECK-NEXT: store i32 %add, i32* %arrayidx2, align 4
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define void @vectorizable_Read_Write(i32* nocapture %A) {
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entry:
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%add.ptr = getelementptr inbounds i32, i32* %A, i64 4
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%0 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %0, 1
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%arrayidx2 = getelementptr inbounds i32, i32* %add.ptr, i64 %indvars.iv
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store i32 %add, i32* %arrayidx2, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; int vectorizable_Write_Read(int *A) {
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; int *B = A + 4;
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; int sum = 0;
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; for (unsigned i = 0; i < 1024; i+=2) {
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; A[i] = i;
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; sum += B[i];
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; }
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;
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; return sum;
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; }
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; CHECK: function 'vectorizable_Write_Read':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: BackwardVectorizable:
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; CHECK-NEXT: store i32 %0, i32* %arrayidx, align 4 ->
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; CHECK-NEXT: %1 = load i32, i32* %arrayidx2, align 4
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define i32 @vectorizable_Write_Read(i32* nocapture %A) {
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entry:
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%add.ptr = getelementptr inbounds i32, i32* %A, i64 4
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret i32 %add
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%sum.013 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%0 = trunc i64 %indvars.iv to i32
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store i32 %0, i32* %arrayidx, align 4
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%arrayidx2 = getelementptr inbounds i32, i32* %add.ptr, i64 %indvars.iv
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%1 = load i32, i32* %arrayidx2, align 4
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%add = add nsw i32 %1, %sum.013
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; void vectorizable_Write_Write(int *A) {
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; int *B = A + 4;
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; for (unsigned i = 0; i < 1024; i+=2) {
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; A[i] = i;
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; B[i] = i+1;
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; }
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; }
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; CHECK: function 'vectorizable_Write_Write':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: BackwardVectorizable:
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; CHECK-NEXT: store i32 %0, i32* %arrayidx, align 4 ->
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; CHECK-NEXT: store i32 %2, i32* %arrayidx2, align 4
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define void @vectorizable_Write_Write(i32* nocapture %A) {
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entry:
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%add.ptr = getelementptr inbounds i32, i32* %A, i64 4
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%0 = trunc i64 %indvars.iv to i32
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store i32 %0, i32* %arrayidx, align 4
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%1 = or i64 %indvars.iv, 1
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%arrayidx2 = getelementptr inbounds i32, i32* %add.ptr, i64 %indvars.iv
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%2 = trunc i64 %1 to i32
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store i32 %2, i32* %arrayidx2, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; void vectorizable_unscaled_Read_Write(int *A) {
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; int *B = (int *)((char *)A + 14);
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; for (unsigned i = 0; i < 1024; i+=2)
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; B[i] = A[i] + 1;
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; }
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; FIXME: This case looks like previous case @vectorizable_Read_Write. It sould
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; be vectorizable.
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; CHECK: function 'vectorizable_unscaled_Read_Write':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Report: unsafe dependent memory operations in loop
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; CHECK-NEXT: Backward loop carried data dependence that prevents store-to-load forwarding.
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: BackwardVectorizableButPreventsForwarding:
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; CHECK-NEXT: %2 = load i32, i32* %arrayidx, align 4 ->
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; CHECK-NEXT: store i32 %add, i32* %arrayidx2, align 4
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define void @vectorizable_unscaled_Read_Write(i32* nocapture %A) {
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entry:
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%0 = bitcast i32* %A to i8*
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%add.ptr = getelementptr inbounds i8, i8* %0, i64 14
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%1 = bitcast i8* %add.ptr to i32*
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret void
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%2 = load i32, i32* %arrayidx, align 4
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%add = add nsw i32 %2, 1
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%arrayidx2 = getelementptr inbounds i32, i32* %1, i64 %indvars.iv
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store i32 %add, i32* %arrayidx2, align 4
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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br i1 %cmp, label %for.body, label %for.cond.cleanup
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}
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; int vectorizable_unscaled_Write_Read(int *A) {
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; int *B = (int *)((char *)A + 17);
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; int sum = 0;
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; for (unsigned i = 0; i < 1024; i+=2) {
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; A[i] = i;
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; sum += B[i];
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; }
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;
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; return sum;
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; }
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; CHECK: function 'vectorizable_unscaled_Write_Read':
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; CHECK-NEXT: for.body:
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; CHECK-NEXT: Memory dependences are safe
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; CHECK-NEXT: Dependences:
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; CHECK-NEXT: BackwardVectorizable:
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; CHECK-NEXT: store i32 %2, i32* %arrayidx, align 4 ->
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; CHECK-NEXT: %3 = load i32, i32* %arrayidx2, align 4
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define i32 @vectorizable_unscaled_Write_Read(i32* nocapture %A) {
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entry:
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%0 = bitcast i32* %A to i8*
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%add.ptr = getelementptr inbounds i8, i8* %0, i64 17
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%1 = bitcast i8* %add.ptr to i32*
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br label %for.body
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for.cond.cleanup: ; preds = %for.body
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ret i32 %add
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for.body: ; preds = %entry, %for.body
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%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
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%sum.013 = phi i32 [ 0, %entry ], [ %add, %for.body ]
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%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
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%2 = trunc i64 %indvars.iv to i32
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store i32 %2, i32* %arrayidx, align 4
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%arrayidx2 = getelementptr inbounds i32, i32* %1, i64 %indvars.iv
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%3 = load i32, i32* %arrayidx2, align 4
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%add = add nsw i32 %3, %sum.013
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%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
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%cmp = icmp ult i64 %indvars.iv.next, 1024
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|
br i1 %cmp, label %for.body, label %for.cond.cleanup
|
|
}
|
|
|
|
; void unsafe_unscaled_Read_Write(int *A) {
|
|
; int *B = (int *)((char *)A + 11);
|
|
; for (unsigned i = 0; i < 1024; i+=2)
|
|
; B[i] = A[i] + 1;
|
|
; }
|
|
|
|
; CHECK: function 'unsafe_unscaled_Read_Write':
|
|
; CHECK-NEXT: for.body:
|
|
; CHECK-NEXT: Report: unsafe dependent memory operations in loop
|
|
; CHECK-NEXT: Backward loop carried data dependence.
|
|
; CHECK-NEXT: Dependences:
|
|
; CHECK-NEXT: Backward:
|
|
; CHECK-NEXT: %2 = load i32, i32* %arrayidx, align 4 ->
|
|
; CHECK-NEXT: store i32 %add, i32* %arrayidx2, align 4
|
|
|
|
define void @unsafe_unscaled_Read_Write(i32* nocapture %A) {
|
|
entry:
|
|
%0 = bitcast i32* %A to i8*
|
|
%add.ptr = getelementptr inbounds i8, i8* %0, i64 11
|
|
%1 = bitcast i8* %add.ptr to i32*
|
|
br label %for.body
|
|
|
|
for.cond.cleanup: ; preds = %for.body
|
|
ret void
|
|
|
|
for.body: ; preds = %entry, %for.body
|
|
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
|
|
%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
|
|
%2 = load i32, i32* %arrayidx, align 4
|
|
%add = add nsw i32 %2, 1
|
|
%arrayidx2 = getelementptr inbounds i32, i32* %1, i64 %indvars.iv
|
|
store i32 %add, i32* %arrayidx2, align 4
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
|
|
%cmp = icmp ult i64 %indvars.iv.next, 1024
|
|
br i1 %cmp, label %for.body, label %for.cond.cleanup
|
|
}
|
|
|
|
; CHECK: function 'unsafe_unscaled_Read_Write2':
|
|
; CHECK-NEXT: for.body:
|
|
; CHECK-NEXT: Report: unsafe dependent memory operations in loop
|
|
; CHECK-NEXT: Backward loop carried data dependence.
|
|
; CHECK-NEXT: Dependences:
|
|
; CHECK-NEXT: Backward:
|
|
; CHECK-NEXT: %2 = load i32, i32* %arrayidx, align 4 ->
|
|
; CHECK-NEXT: store i32 %add, i32* %arrayidx2, align 4
|
|
|
|
; void unsafe_unscaled_Read_Write2(int *A) {
|
|
; int *B = (int *)((char *)A + 1);
|
|
; for (unsigned i = 0; i < 1024; i+=2)
|
|
; B[i] = A[i] + 1;
|
|
; }
|
|
|
|
define void @unsafe_unscaled_Read_Write2(i32* nocapture %A) {
|
|
entry:
|
|
%0 = bitcast i32* %A to i8*
|
|
%add.ptr = getelementptr inbounds i8, i8* %0, i64 1
|
|
%1 = bitcast i8* %add.ptr to i32*
|
|
br label %for.body
|
|
|
|
for.cond.cleanup: ; preds = %for.body
|
|
ret void
|
|
|
|
for.body: ; preds = %entry, %for.body
|
|
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
|
|
%arrayidx = getelementptr inbounds i32, i32* %A, i64 %indvars.iv
|
|
%2 = load i32, i32* %arrayidx, align 4
|
|
%add = add nsw i32 %2, 1
|
|
%arrayidx2 = getelementptr inbounds i32, i32* %1, i64 %indvars.iv
|
|
store i32 %add, i32* %arrayidx2, align 4
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
|
|
%cmp = icmp ult i64 %indvars.iv.next, 1024
|
|
br i1 %cmp, label %for.body, label %for.cond.cleanup
|
|
}
|
|
|
|
; Following case checks that interleaved stores have dependences with another
|
|
; store and can not pass dependence check.
|
|
|
|
; void interleaved_stores(int *A) {
|
|
; int *B = (int *) ((char *)A + 1);
|
|
; for(int i = 0; i < 1024; i+=2) {
|
|
; B[i] = i; // (1)
|
|
; A[i+1] = i + 1; // (2)
|
|
; B[i+1] = i + 1; // (3)
|
|
; }
|
|
; }
|
|
;
|
|
; The access (2) has overlaps with (1) and (3).
|
|
|
|
; CHECK: function 'interleaved_stores':
|
|
; CHECK-NEXT: for.body:
|
|
; CHECK-NEXT: Report: unsafe dependent memory operations in loop
|
|
; CHECK-NEXT: Backward loop carried data dependence.
|
|
; CHECK-NEXT: Dependences:
|
|
; CHECK-NEXT: Backward:
|
|
; CHECK-NEXT: store i32 %4, i32* %arrayidx5, align 4 ->
|
|
; CHECK-NEXT: store i32 %4, i32* %arrayidx9, align 4
|
|
; CHECK: Backward:
|
|
; CHECK-NEXT: store i32 %2, i32* %arrayidx2, align 4 ->
|
|
; CHECK-NEXT: store i32 %4, i32* %arrayidx5, align 4
|
|
|
|
define void @interleaved_stores(i32* nocapture %A) {
|
|
entry:
|
|
%0 = bitcast i32* %A to i8*
|
|
%incdec.ptr = getelementptr inbounds i8, i8* %0, i64 1
|
|
%1 = bitcast i8* %incdec.ptr to i32*
|
|
br label %for.body
|
|
|
|
for.cond.cleanup: ; preds = %for.body
|
|
ret void
|
|
|
|
for.body: ; preds = %entry, %for.body
|
|
%indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
|
|
%2 = trunc i64 %indvars.iv to i32
|
|
%arrayidx2 = getelementptr inbounds i32, i32* %1, i64 %indvars.iv
|
|
store i32 %2, i32* %arrayidx2, align 4
|
|
%3 = or i64 %indvars.iv, 1
|
|
%arrayidx5 = getelementptr inbounds i32, i32* %A, i64 %3
|
|
%4 = trunc i64 %3 to i32
|
|
store i32 %4, i32* %arrayidx5, align 4
|
|
%arrayidx9 = getelementptr inbounds i32, i32* %1, i64 %3
|
|
store i32 %4, i32* %arrayidx9, align 4
|
|
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 2
|
|
%cmp = icmp slt i64 %indvars.iv.next, 1024
|
|
br i1 %cmp, label %for.body, label %for.cond.cleanup
|
|
}
|