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llvm-project/llvm/test/Transforms/LoopVectorize/global_alias.ll

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; RUN: opt < %s -O3 -loop-vectorize -force-vector-unroll=1 -force-vector-width=4 -dce -instcombine -S | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:64:128-a0:0:64-n32-S64"
%struct.anon = type { [100 x i32], i32, [100 x i32] }
@Foo = common global %struct.anon zeroinitializer, align 4
@PB = external global i32*
@PA = external global i32*
; int noAlias01 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[i] = Foo.B[i] + a;
; return Foo.A[a];
; }
; CHECK: define i32 @noAlias01
; CHECK: add nsw <4 x i32>
; CHECK ret
define i32 @noAlias01(i32 %a) nounwind {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32* %i, align 4
%cmp = icmp slt i32 %0, 100
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32* %i, align 4
%arrayidx = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %1
%2 = load i32* %arrayidx, align 4
%3 = load i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32* %i, align 4
%arrayidx1 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %4
store i32 %add, i32* %arrayidx1, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32* %i, align 4
%inc = add nsw i32 %5, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%6 = load i32* %a.addr, align 4
%arrayidx2 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32* %arrayidx2, align 4
ret i32 %7
}
; int mayAlias01 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[i] = Foo.B[SIZE-i-1] + a;
; return Foo.A[a];
; }
; CHECK: define i32 @mayAlias01
; CHECK-NOT: add nsw <4 x i32>
; CHECK ret
define i32 @mayAlias01(i32 %a) nounwind {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32* %i, align 4
%cmp = icmp slt i32 %0, 100
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 1
%arrayidx = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32* %arrayidx, align 4
%3 = load i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32* %i, align 4
%arrayidx2 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %4
store i32 %add, i32* %arrayidx2, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32* %i, align 4
%inc = add nsw i32 %5, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%6 = load i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32* %arrayidx3, align 4
ret i32 %7
}
; int mayAlias02 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[SIZE-i-1] = Foo.B[i] + a;
; return Foo.A[a];
; }
; CHECK: define i32 @mayAlias02
; CHECK-NOT: add nsw <4 x i32>
; CHECK ret
define i32 @mayAlias02(i32 %a) nounwind {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32* %i, align 4
%cmp = icmp slt i32 %0, 100
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32* %i, align 4
%arrayidx = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %1
%2 = load i32* %arrayidx, align 4
%3 = load i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32* %i, align 4
%sub = sub nsw i32 100, %4
%sub1 = sub nsw i32 %sub, 1
%arrayidx2 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %sub1
store i32 %add, i32* %arrayidx2, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32* %i, align 4
%inc = add nsw i32 %5, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%6 = load i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32* %arrayidx3, align 4
ret i32 %7
}
; int mayAlias03 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; *(PA+i) = *(PB+SIZE-i-1) + a;
; return *(PA+a);
; }
; CHECK: define i32 @mayAlias03
; CHECK-NOT: add nsw <4 x i32>
; CHECK ret
define i32 @mayAlias03(i32 %a) nounwind {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32* %i, align 4
%cmp = icmp slt i32 %0, 100
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32** @PB, align 4
%add.ptr = getelementptr inbounds i32* %1, i32 100
%2 = load i32* %i, align 4
%idx.neg = sub i32 0, %2
%add.ptr1 = getelementptr inbounds i32* %add.ptr, i32 %idx.neg
%add.ptr2 = getelementptr inbounds i32* %add.ptr1, i32 -1
%3 = load i32* %add.ptr2, align 4
%4 = load i32* %a.addr, align 4
%add = add nsw i32 %3, %4
%5 = load i32** @PA, align 4
%6 = load i32* %i, align 4
%add.ptr3 = getelementptr inbounds i32* %5, i32 %6
store i32 %add, i32* %add.ptr3, align 4
br label %for.inc
for.inc: ; preds = %for.body
%7 = load i32* %i, align 4
%inc = add nsw i32 %7, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%8 = load i32** @PA, align 4
%9 = load i32* %a.addr, align 4
%add.ptr4 = getelementptr inbounds i32* %8, i32 %9
%10 = load i32* %add.ptr4, align 4
ret i32 %10
}
; int mustAlias01 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[i+10] = Foo.B[SIZE-i-1] + a;
; return Foo.A[a];
; }
; CHECK: define i32 @mustAlias01
; CHECK-NOT: add nsw <4 x i32>
; CHECK ret
define i32 @mustAlias01(i32 %a) nounwind {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32* %i, align 4
%cmp = icmp slt i32 %0, 100
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 1
%arrayidx = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32* %arrayidx, align 4
%3 = load i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32* %i, align 4
%add2 = add nsw i32 %4, 10
%arrayidx3 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %add2
store i32 %add, i32* %arrayidx3, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32* %i, align 4
%inc = add nsw i32 %5, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%6 = load i32* %a.addr, align 4
%arrayidx4 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32* %arrayidx4, align 4
ret i32 %7
}
; int mustAlias02 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[i] = Foo.B[SIZE-i-10] + a;
; return Foo.A[a];
; }
; CHECK: define i32 @mustAlias02
; CHECK-NOT: add nsw <4 x i32>
; CHECK ret
define i32 @mustAlias02(i32 %a) nounwind {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32* %i, align 4
%cmp = icmp slt i32 %0, 100
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 10
%arrayidx = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32* %arrayidx, align 4
%3 = load i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32* %i, align 4
%arrayidx2 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %4
store i32 %add, i32* %arrayidx2, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32* %i, align 4
%inc = add nsw i32 %5, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%6 = load i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32* %arrayidx3, align 4
ret i32 %7
}
; int mustAlias03 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[i+10] = Foo.B[SIZE-i-10] + a;
; return Foo.A[a];
; }
; CHECK: define i32 @mustAlias03
; CHECK-NOT: add nsw <4 x i32>
; CHECK ret
define i32 @mustAlias03(i32 %a) nounwind {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32* %i, align 4
%cmp = icmp slt i32 %0, 100
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 10
%arrayidx = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32* %arrayidx, align 4
%3 = load i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32* %i, align 4
%add2 = add nsw i32 %4, 10
%arrayidx3 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %add2
store i32 %add, i32* %arrayidx3, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32* %i, align 4
%inc = add nsw i32 %5, 1
store i32 %inc, i32* %i, align 4
br label %for.cond
for.end: ; preds = %for.cond
%6 = load i32* %a.addr, align 4
%arrayidx4 = getelementptr inbounds [100 x i32]* getelementptr inbounds (%struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32* %arrayidx4, align 4
ret i32 %7
}
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