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llvm-mirror/test/Transforms/LoopVectorize/global_alias.ll
Wei Mi a63472cac9 Recommit the patch "Use uniforms set to populate VecValuesToIgnore". 
For instructions in uniform set, they will not have vector versions so
add them to VecValuesToIgnore.
For induction vars, those only used in uniform instructions or consecutive
ptrs instructions have already been added to VecValuesToIgnore above. For
those induction vars which are only used in uniform instructions or
non-consecutive/non-gather scatter ptr instructions, the related phi and
update will also be added into VecValuesToIgnore set.

The change will make the vector RegUsages estimation less conservative.

Differential Revision: https://reviews.llvm.org/D20474

The recommit fixed the testcase global_alias.ll.

llvm-svn: 275936
2016-07-19 00:50:43 +00:00

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; 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 <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 <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 <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
}
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