; RUN: opt < %s -O1 -loop-vectorize -force-vector-interleave=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] }
%struct.anon.0 = type { [100 x [100 x i32]], i32, [100 x [100 x i32]] }
@Foo = common global %struct.anon zeroinitializer, align 4
@Bar = common global %struct.anon.0 zeroinitializer, align 4
@PB = external global i32*
@PA = external global i32*
;; === First, the tests that should always vectorize, whether statically or by adding run-time checks ===
; /// Different objects, positive induction, constant distance
; int noAlias01 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[i] = Foo.B[i] + a;
; return Foo.A[a];
; }
; CHECK-LABEL: 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, 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, i32* %i, align 4
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%arrayidx1 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %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, 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, i32* %a.addr, align 4
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx2, align 4
ret i32 %7
}
; /// Different objects, positive induction with widening slide
; int noAlias02 (int a) {
; int i;
; for (i=0; i<SIZE-10; i++)
; Foo.A[i] = Foo.B[i+10] + a;
; return Foo.A[a];
; }
; CHECK-LABEL: define i32 @noAlias02(
; CHECK: add nsw <4 x i32>
; CHECK: ret
define i32 @noAlias02(i32 %a) {
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, i32* %i, align 4
%cmp = icmp slt i32 %0, 90
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32, i32* %i, align 4
%add = add nsw i32 %1, 10
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %add
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add1 = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %4
store i32 %add1, i32* %arrayidx2, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32, 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, i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx3, align 4
ret i32 %7
}
; /// Different objects, positive induction with shortening slide
; int noAlias03 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[i+10] = Foo.B[i] + a;
; return Foo.A[a];
; }
; CHECK-LABEL: define i32 @noAlias03(
; CHECK: add nsw <4 x i32>
; CHECK: ret
define i32 @noAlias03(i32 %a) {
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, 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, i32* %i, align 4
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%add1 = add nsw i32 %4, 10
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %add1
store i32 %add, i32* %arrayidx2, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32, 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, i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx3, align 4
ret i32 %7
}
; /// Pointer access, positive stride, run-time check added
; int noAlias04 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; *(PA+i) = *(PB+i) + a;
; return *(PA+a);
; }
; CHECK-LABEL: define i32 @noAlias04(
; CHECK-NOT: add nsw <4 x i32>
; CHECK: ret
;
; TODO: This test vectorizes (with run-time check) on real targets with -O3)
; Check why it's not being vectorized even when forcing vectorization
define i32 @noAlias04(i32 %a) #0 {
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, 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*, i32** @PB, align 4
%2 = load i32, i32* %i, align 4
%add.ptr = getelementptr inbounds i32, i32* %1, i32 %2
%3 = load i32, i32* %add.ptr, align 4
%4 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %3, %4
%5 = load i32*, i32** @PA, align 4
%6 = load i32, i32* %i, align 4
%add.ptr1 = getelementptr inbounds i32, i32* %5, i32 %6
store i32 %add, i32* %add.ptr1, align 4
br label %for.inc
for.inc: ; preds = %for.body
%7 = load i32, 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*, i32** @PA, align 4
%9 = load i32, i32* %a.addr, align 4
%add.ptr2 = getelementptr inbounds i32, i32* %8, i32 %9
%10 = load i32, i32* %add.ptr2, align 4
ret i32 %10
}
; /// Different objects, positive induction, multi-array
; int noAlias05 (int a) {
; int i, N=10;
; for (i=0; i<SIZE; i++)
; Bar.A[N][i] = Bar.B[N][i] + a;
; return Bar.A[N][a];
; }
; CHECK-LABEL: define i32 @noAlias05(
; CHECK: add nsw <4 x i32>
; CHECK: ret
define i32 @noAlias05(i32 %a) #0 {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
%N = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 10, i32* %N, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32, 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, i32* %i, align 4
%2 = load i32, i32* %N, align 4
%arrayidx = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 2), i32 0, i32 %2
%arrayidx1 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx, i32 0, i32 %1
%3 = load i32, i32* %arrayidx1, align 4
%4 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %3, %4
%5 = load i32, i32* %i, align 4
%6 = load i32, i32* %N, align 4
%arrayidx2 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %6
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx2, i32 0, i32 %5
store i32 %add, i32* %arrayidx3, align 4
br label %for.inc
for.inc: ; preds = %for.body
%7 = load i32, 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, i32* %a.addr, align 4
%9 = load i32, i32* %N, align 4
%arrayidx4 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %9
%arrayidx5 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx4, i32 0, i32 %8
%10 = load i32, i32* %arrayidx5, align 4
ret i32 %10
}
; /// Same objects, positive induction, multi-array, different sub-elements
; int noAlias06 (int a) {
; int i, N=10;
; for (i=0; i<SIZE; i++)
; Bar.A[N][i] = Bar.A[N+1][i] + a;
; return Bar.A[N][a];
; }
; CHECK-LABEL: define i32 @noAlias06(
; CHECK: add nsw <4 x i32>
; CHECK: ret
define i32 @noAlias06(i32 %a) #0 {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
%N = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 10, i32* %N, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32, 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, i32* %i, align 4
%2 = load i32, i32* %N, align 4
%add = add nsw i32 %2, 1
%arrayidx = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %add
%arrayidx1 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx, i32 0, i32 %1
%3 = load i32, i32* %arrayidx1, align 4
%4 = load i32, i32* %a.addr, align 4
%add2 = add nsw i32 %3, %4
%5 = load i32, i32* %i, align 4
%6 = load i32, i32* %N, align 4
%arrayidx3 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %6
%arrayidx4 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx3, i32 0, i32 %5
store i32 %add2, i32* %arrayidx4, align 4
br label %for.inc
for.inc: ; preds = %for.body
%7 = load i32, 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, i32* %a.addr, align 4
%9 = load i32, i32* %N, align 4
%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %9
%arrayidx6 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx5, i32 0, i32 %8
%10 = load i32, i32* %arrayidx6, align 4
ret i32 %10
}
; /// Different objects, negative induction, constant distance
; int noAlias07 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[SIZE-i-1] = Foo.B[SIZE-i-1] + a;
; return Foo.A[a];
; }
; CHECK-LABEL: define i32 @noAlias07(
; CHECK: store <4 x i32>
; CHECK: ret
define i32 @noAlias07(i32 %a) #0 {
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, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 1
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%sub2 = sub nsw i32 100, %4
%sub3 = sub nsw i32 %sub2, 1
%arrayidx4 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %sub3
store i32 %add, i32* %arrayidx4, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32, 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, i32* %a.addr, align 4
%arrayidx5 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx5, align 4
ret i32 %7
}
; /// Different objects, negative induction, shortening slide
; int noAlias08 (int a) {
; int i;
; for (i=0; i<SIZE-10; i++)
; Foo.A[SIZE-i-1] = Foo.B[SIZE-i-10] + a;
; return Foo.A[a];
; }
; CHECK-LABEL: define i32 @noAlias08(
; CHECK: sub nuw nsw <4 x i32>
; CHECK: ret
define i32 @noAlias08(i32 %a) #0 {
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, i32* %i, align 4
%cmp = icmp slt i32 %0, 90
br i1 %cmp, label %for.body, label %for.end
for.body: ; preds = %for.cond
%1 = load i32, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 10
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%sub2 = sub nsw i32 100, %4
%sub3 = sub nsw i32 %sub2, 1
%arrayidx4 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %sub3
store i32 %add, i32* %arrayidx4, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32, 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, i32* %a.addr, align 4
%arrayidx5 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx5, align 4
ret i32 %7
}
; /// Different objects, negative induction, widening slide
; int noAlias09 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[SIZE-i-10] = Foo.B[SIZE-i-1] + a;
; return Foo.A[a];
; }
; CHECK-LABEL: define i32 @noAlias09(
; CHECK: sub nuw nsw <4 x i32>
; CHECK: ret
define i32 @noAlias09(i32 %a) #0 {
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, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 1
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%sub2 = sub nsw i32 100, %4
%sub3 = sub nsw i32 %sub2, 10
%arrayidx4 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %sub3
store i32 %add, i32* %arrayidx4, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32, 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, i32* %a.addr, align 4
%arrayidx5 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx5, align 4
ret i32 %7
}
; /// Pointer access, negative stride, run-time check added
; int noAlias10 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; *(PA+SIZE-i-1) = *(PB+SIZE-i-1) + a;
; return *(PA+a);
; }
; CHECK-LABEL: define i32 @noAlias10(
; CHECK-NOT: sub {{.*}} <4 x i32>
; CHECK: ret
;
; TODO: This test vectorizes (with run-time check) on real targets with -O3)
; Check why it's not being vectorized even when forcing vectorization
define i32 @noAlias10(i32 %a) #0 {
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, 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*, i32** @PB, align 4
%add.ptr = getelementptr inbounds i32, i32* %1, i32 100
%2 = load i32, i32* %i, align 4
%idx.neg = sub i32 0, %2
%add.ptr1 = getelementptr inbounds i32, i32* %add.ptr, i32 %idx.neg
%add.ptr2 = getelementptr inbounds i32, i32* %add.ptr1, i32 -1
%3 = load i32, i32* %add.ptr2, align 4
%4 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %3, %4
%5 = load i32*, i32** @PA, align 4
%add.ptr3 = getelementptr inbounds i32, i32* %5, i32 100
%6 = load i32, i32* %i, align 4
%idx.neg4 = sub i32 0, %6
%add.ptr5 = getelementptr inbounds i32, i32* %add.ptr3, i32 %idx.neg4
%add.ptr6 = getelementptr inbounds i32, i32* %add.ptr5, i32 -1
store i32 %add, i32* %add.ptr6, align 4
br label %for.inc
for.inc: ; preds = %for.body
%7 = load i32, 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*, i32** @PA, align 4
%9 = load i32, i32* %a.addr, align 4
%add.ptr7 = getelementptr inbounds i32, i32* %8, i32 %9
%10 = load i32, i32* %add.ptr7, align 4
ret i32 %10
}
; /// Different objects, negative induction, multi-array
; int noAlias11 (int a) {
; int i, N=10;
; for (i=0; i<SIZE; i++)
; Bar.A[N][SIZE-i-1] = Bar.B[N][SIZE-i-1] + a;
; return Bar.A[N][a];
; }
; CHECK-LABEL: define i32 @noAlias11(
; CHECK: store <4 x i32>
; CHECK: ret
define i32 @noAlias11(i32 %a) #0 {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
%N = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 10, i32* %N, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 1
%2 = load i32, i32* %N, align 4
%arrayidx = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 2), i32 0, i32 %2
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx, i32 0, i32 %sub1
%3 = load i32, i32* %arrayidx2, align 4
%4 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %3, %4
%5 = load i32, i32* %i, align 4
%sub3 = sub nsw i32 100, %5
%sub4 = sub nsw i32 %sub3, 1
%6 = load i32, i32* %N, align 4
%arrayidx5 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %6
%arrayidx6 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx5, i32 0, i32 %sub4
store i32 %add, i32* %arrayidx6, align 4
br label %for.inc
for.inc: ; preds = %for.body
%7 = load i32, 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, i32* %a.addr, align 4
%9 = load i32, i32* %N, align 4
%arrayidx7 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %9
%arrayidx8 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx7, i32 0, i32 %8
%10 = load i32, i32* %arrayidx8, align 4
ret i32 %10
}
; /// Same objects, negative induction, multi-array, different sub-elements
; int noAlias12 (int a) {
; int i, N=10;
; for (i=0; i<SIZE; i++)
; Bar.A[N][SIZE-i-1] = Bar.A[N+1][SIZE-i-1] + a;
; return Bar.A[N][a];
; }
; CHECK-LABEL: define i32 @noAlias12(
; CHECK: store <4 x i32>
; CHECK: ret
define i32 @noAlias12(i32 %a) #0 {
entry:
%a.addr = alloca i32, align 4
%i = alloca i32, align 4
%N = alloca i32, align 4
store i32 %a, i32* %a.addr, align 4
store i32 10, i32* %N, align 4
store i32 0, i32* %i, align 4
br label %for.cond
for.cond: ; preds = %for.inc, %entry
%0 = load i32, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 1
%2 = load i32, i32* %N, align 4
%add = add nsw i32 %2, 1
%arrayidx = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %add
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx, i32 0, i32 %sub1
%3 = load i32, i32* %arrayidx2, align 4
%4 = load i32, i32* %a.addr, align 4
%add3 = add nsw i32 %3, %4
%5 = load i32, i32* %i, align 4
%sub4 = sub nsw i32 100, %5
%sub5 = sub nsw i32 %sub4, 1
%6 = load i32, i32* %N, align 4
%arrayidx6 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %6
%arrayidx7 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx6, i32 0, i32 %sub5
store i32 %add3, i32* %arrayidx7, align 4
br label %for.inc
for.inc: ; preds = %for.body
%7 = load i32, 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, i32* %a.addr, align 4
%9 = load i32, i32* %N, align 4
%arrayidx8 = getelementptr inbounds [100 x [100 x i32]], [100 x [100 x i32]]* getelementptr inbounds (%struct.anon.0, %struct.anon.0* @Bar, i32 0, i32 0), i32 0, i32 %9
%arrayidx9 = getelementptr inbounds [100 x i32], [100 x i32]* %arrayidx8, i32 0, i32 %8
%10 = load i32, i32* %arrayidx9, align 4
ret i32 %10
}
; /// Same objects, positive induction, constant distance, just enough for vector size
; int noAlias13 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[i] = Foo.A[i+4] + a;
; return Foo.A[a];
; }
; CHECK-LABEL: define i32 @noAlias13(
; CHECK: add nsw <4 x i32>
; CHECK: ret
define i32 @noAlias13(i32 %a) #0 {
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, 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, i32* %i, align 4
%add = add nsw i32 %1, 4
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %add
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add1 = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %4
store i32 %add1, i32* %arrayidx2, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32, 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, i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx3, align 4
ret i32 %7
}
; /// Same objects, negative induction, constant distance, just enough for vector size
; int noAlias14 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; Foo.A[SIZE-i-1] = Foo.A[SIZE-i-5] + a;
; return Foo.A[a];
; }
; CHECK-LABEL: define i32 @noAlias14(
; CHECK: sub nuw nsw <4 x i32>
; CHECK: ret
define i32 @noAlias14(i32 %a) #0 {
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, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 5
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %sub1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%sub2 = sub nsw i32 100, %4
%sub3 = sub nsw i32 %sub2, 1
%arrayidx4 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %sub3
store i32 %add, i32* %arrayidx4, align 4
br label %for.inc
for.inc: ; preds = %for.body
%5 = load i32, 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, i32* %a.addr, align 4
%arrayidx5 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx5, align 4
ret i32 %7
}
;; === Now, the tests that we could vectorize with induction changes or run-time checks ===
; /// Different objects, swapped induction, alias at the end
; 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-LABEL: 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, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 1
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %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, 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, i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx3, align 4
ret i32 %7
}
; /// Different objects, swapped induction, alias at the beginning
; 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-LABEL: 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, 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, i32* %i, align 4
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%sub = sub nsw i32 100, %4
%sub1 = sub nsw i32 %sub, 1
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %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, 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, i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx3, align 4
ret i32 %7
}
; /// Pointer access, run-time check added
; int mayAlias03 (int a) {
; int i;
; for (i=0; i<SIZE; i++)
; *(PA+i) = *(PB+SIZE-i-1) + a;
; return *(PA+a);
; }
; CHECK-LABEL: 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, 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*, i32** @PB, align 4
%add.ptr = getelementptr inbounds i32, i32* %1, i32 100
%2 = load i32, i32* %i, align 4
%idx.neg = sub i32 0, %2
%add.ptr1 = getelementptr inbounds i32, i32* %add.ptr, i32 %idx.neg
%add.ptr2 = getelementptr inbounds i32, i32* %add.ptr1, i32 -1
%3 = load i32, i32* %add.ptr2, align 4
%4 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %3, %4
%5 = load i32*, i32** @PA, align 4
%6 = load i32, i32* %i, align 4
%add.ptr3 = getelementptr inbounds i32, i32* %5, i32 %6
store i32 %add, i32* %add.ptr3, align 4
br label %for.inc
for.inc: ; preds = %for.body
%7 = load i32, 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*, i32** @PA, align 4
%9 = load i32, i32* %a.addr, align 4
%add.ptr4 = getelementptr inbounds i32, i32* %8, i32 %9
%10 = load i32, i32* %add.ptr4, align 4
ret i32 %10
}
;; === Finally, the tests that should only vectorize with care (or if we ignore undefined behaviour at all) ===
; 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-LABEL: 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, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 1
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%add2 = add nsw i32 %4, 10
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %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, 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, i32* %a.addr, align 4
%arrayidx4 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, 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-LABEL: 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, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 10
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%arrayidx2 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %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, 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, i32* %a.addr, align 4
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, 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-LABEL: 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, 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, i32* %i, align 4
%sub = sub nsw i32 100, %1
%sub1 = sub nsw i32 %sub, 10
%arrayidx = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 2), i32 0, i32 %sub1
%2 = load i32, i32* %arrayidx, align 4
%3 = load i32, i32* %a.addr, align 4
%add = add nsw i32 %2, %3
%4 = load i32, i32* %i, align 4
%add2 = add nsw i32 %4, 10
%arrayidx3 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %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, 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, i32* %a.addr, align 4
%arrayidx4 = getelementptr inbounds [100 x i32], [100 x i32]* getelementptr inbounds (%struct.anon, %struct.anon* @Foo, i32 0, i32 0), i32 0, i32 %6
%7 = load i32, i32* %arrayidx4, align 4
ret i32 %7
}