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clang-p2996/llvm/test/Transforms/InstCombine/dependent-ivs.ll
Nikita Popov a105877646 [InstCombine] Remove some of the complexity-based canonicalization (#91185) 
The idea behind this canonicalization is that it allows us to handle less
patterns, because we know that some will be canonicalized away. This is
indeed very useful to e.g. know that constants are always on the right.

However, this is only useful if the canonicalization is actually
reliable. This is the case for constants, but not for arguments: Moving
these to the right makes it look like the "more complex" expression is
guaranteed to be on the left, but this is not actually the case in
practice. It fails as soon as you replace the argument with another
instruction.

The end result is that it looks like things correctly work in tests,
while they actually don't. We use the "thwart complexity-based
canonicalization" trick to handle this in tests, but it's often a
challenge for new contributors to get this right, and based on the
regressions this PR originally exposed, we clearly don't get this right
in many cases.

For this reason, I think that it's better to remove this complexity
canonicalization. It will make it much easier to write tests for
commuted cases and make sure that they are handled.
2024-08-21 12:02:54 +02:00

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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4
; RUN: opt -S -passes=instcombine < %s | FileCheck %s
define void @int_iv_nuw(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_nuw(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = add nuw i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = add nuw i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_nsw(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_nsw(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = add nsw i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = add nsw i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_commuted_add(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_commuted_add(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: [[BASE2:%.*]] = mul i64 [[BASE]], 42
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = add i64 [[IV]], [[BASE2]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
%base2 = mul i64 %base, 42 ; thwart complexity-based canonicalization
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base2, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = add i64 %base2, %iv.next
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_commuted_phi1(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_commuted_phi1(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP]] ]
; CHECK-NEXT: [[IV2:%.*]] = add i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %base, %entry ], [ %iv2.next, %loop ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = add i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_commuted_phi2(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_commuted_phi2(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = add i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = add i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_vector(<2 x i64> %base) {
; CHECK-LABEL: define void @int_iv_vector(
; CHECK-SAME: <2 x i64> [[BASE:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi <2 x i64> [ [[IV_NEXT:%.*]], [[LOOP]] ], [ zeroinitializer, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = add <2 x i64> [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.v2i64(<2 x i64> [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw <2 x i64> [[IV]], <i64 4, i64 4>
; CHECK-NEXT: [[CMP:%.*]] = call i1 @get.i1()
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi <2 x i64> [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi <2 x i64> [ %iv.next, %loop ], [ zeroinitializer, %entry ]
call void @use.v2i64(<2 x i64> %iv2)
%iv.next = add nuw nsw <2 x i64> %iv, <i64 4, i64 4>
%iv2.next = add <2 x i64> %iv.next, %base
%cmp = call i1 @get.i1()
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_vector_poison_invalid(<2 x i64> %base) {
; CHECK-LABEL: define void @int_iv_vector_poison_invalid(
; CHECK-SAME: <2 x i64> [[BASE:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV2:%.*]] = phi <2 x i64> [ [[IV2_NEXT:%.*]], [[LOOP]] ], [ [[BASE]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV:%.*]] = phi <2 x i64> [ [[IV_NEXT:%.*]], [[LOOP]] ], [ <i64 0, i64 poison>, [[ENTRY]] ]
; CHECK-NEXT: call void @use.v2i64(<2 x i64> [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw <2 x i64> [[IV]], <i64 4, i64 4>
; CHECK-NEXT: [[IV2_NEXT]] = add <2 x i64> [[IV_NEXT]], [[BASE]]
; CHECK-NEXT: [[CMP:%.*]] = call i1 @get.i1()
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi <2 x i64> [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi <2 x i64> [ %iv.next, %loop ], [ <i64 0, i64 poison>, %entry ]
call void @use.v2i64(<2 x i64> %iv2)
%iv.next = add nuw nsw <2 x i64> %iv, <i64 4, i64 4>
%iv2.next = add <2 x i64> %iv.next, %base
%cmp = call i1 @get.i1()
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_loop_variant_step(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_loop_variant_step(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = add nuw i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[STEP:%.*]] = call i64 @get.i64()
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], [[STEP]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%step = call i64 @get.i64()
%iv.next = add nuw nsw i64 %iv, %step
%iv2.next = add nuw i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_xor(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_xor(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = xor i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = xor i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_or(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_or(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = or i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = or i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_or_disjoint(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_or_disjoint(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = or disjoint i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = or disjoint i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_and(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_and(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ -1, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV2:%.*]] = and i64 [[IV]], [[BASE]]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ -1, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = and i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_sub(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_sub(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV2:%.*]] = phi i64 [ [[IV2_NEXT:%.*]], [[LOOP]] ], [ [[BASE]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[IV2_NEXT]] = sub i64 [[BASE]], [[IV_NEXT]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = sub i64 %base, %iv.next
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_sub_invalid_order(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_sub_invalid_order(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV2:%.*]] = phi i64 [ [[IV2_NEXT:%.*]], [[LOOP]] ], [ [[BASE]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[IV2_NEXT]] = sub i64 [[IV_NEXT]], [[BASE]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = sub i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_add_wrong_start(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_add_wrong_start(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV2:%.*]] = phi i64 [ [[IV2_NEXT:%.*]], [[LOOP]] ], [ [[BASE]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 1, [[ENTRY]] ]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[IV2_NEXT]] = add i64 [[BASE]], [[IV_NEXT]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 1, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = add i64 %base, %iv.next
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @int_iv_and_wrong_start(i64 %base, i64 %end) {
; CHECK-LABEL: define void @int_iv_and_wrong_start(
; CHECK-SAME: i64 [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV2:%.*]] = phi i64 [ [[IV2_NEXT:%.*]], [[LOOP]] ], [ [[BASE]], [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY]] ]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[IV2_NEXT]] = and i64 [[IV_NEXT]], [[BASE]]
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv2 = phi i64 [ %iv2.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.i64(i64 %iv2)
%iv.next = add nuw nsw i64 %iv, 4
%iv2.next = and i64 %iv.next, %base
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @ptr_iv_inbounds(ptr %base, i64 %end) {
; CHECK-LABEL: define void @ptr_iv_inbounds(
; CHECK-SAME: ptr [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV_PTR:%.*]] = getelementptr inbounds i8, ptr [[BASE]], i64 [[IV]]
; CHECK-NEXT: call void @use.p0(ptr [[IV_PTR]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv.ptr = phi ptr [ %iv.ptr.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.p0(ptr %iv.ptr)
%iv.next = add nuw nsw i64 %iv, 4
%iv.ptr.next = getelementptr inbounds i8, ptr %base, i64 %iv.next
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @ptr_iv_nuw(ptr %base, i64 %end) {
; CHECK-LABEL: define void @ptr_iv_nuw(
; CHECK-SAME: ptr [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV_PTR:%.*]] = getelementptr nuw i8, ptr [[BASE]], i64 [[IV]]
; CHECK-NEXT: call void @use.p0(ptr [[IV_PTR]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv.ptr = phi ptr [ %iv.ptr.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.p0(ptr %iv.ptr)
%iv.next = add nuw nsw i64 %iv, 4
%iv.ptr.next = getelementptr nuw i8, ptr %base, i64 %iv.next
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @ptr_iv_no_flags(ptr %base, i64 %end) {
; CHECK-LABEL: define void @ptr_iv_no_flags(
; CHECK-SAME: ptr [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV_PTR:%.*]] = getelementptr i8, ptr [[BASE]], i64 [[IV]]
; CHECK-NEXT: call void @use.p0(ptr [[IV_PTR]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv.ptr = phi ptr [ %iv.ptr.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.p0(ptr %iv.ptr)
%iv.next = add nuw nsw i64 %iv, 4
%iv.ptr.next = getelementptr i8, ptr %base, i64 %iv.next
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @ptr_iv_non_i8_type(ptr %base, i64 %end) {
; CHECK-LABEL: define void @ptr_iv_non_i8_type(
; CHECK-SAME: ptr [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV_PTR:%.*]] = getelementptr i32, ptr [[BASE]], i64 [[IV]]
; CHECK-NEXT: call void @use.p0(ptr [[IV_PTR]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv.ptr = phi ptr [ %iv.ptr.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.p0(ptr %iv.ptr)
%iv.next = add nuw nsw i64 %iv, 4
%iv.ptr.next = getelementptr i32, ptr %base, i64 %iv.next
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @ptr_iv_vector(<2 x ptr> %base, i64 %end) {
; CHECK-LABEL: define void @ptr_iv_vector(
; CHECK-SAME: <2 x ptr> [[BASE:%.*]], i64 [[END:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV_PTR:%.*]] = getelementptr inbounds i8, <2 x ptr> [[BASE]], i64 [[IV]]
; CHECK-NEXT: call void @use.v2p0(<2 x ptr> [[IV_PTR]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = icmp eq i64 [[IV_NEXT]], [[END]]
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv.ptr = phi <2 x ptr> [ %iv.ptr.next, %loop ], [ %base, %entry ]
%iv = phi i64 [ %iv.next, %loop ], [ 0, %entry ]
call void @use.v2p0(<2 x ptr> %iv.ptr)
%iv.next = add nuw nsw i64 %iv, 4
%iv.ptr.next = getelementptr inbounds i8, <2 x ptr> %base, i64 %iv.next
%cmp = icmp eq i64 %iv.next, %end
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @ptr_iv_vector2(<2 x ptr> %base) {
; CHECK-LABEL: define void @ptr_iv_vector2(
; CHECK-SAME: <2 x ptr> [[BASE:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP:%.*]]
; CHECK: loop:
; CHECK-NEXT: [[IV:%.*]] = phi <2 x i64> [ [[IV_NEXT:%.*]], [[LOOP]] ], [ zeroinitializer, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[IV_PTR:%.*]] = getelementptr i8, <2 x ptr> [[BASE]], <2 x i64> [[IV]]
; CHECK-NEXT: call void @use.v2p0(<2 x ptr> [[IV_PTR]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw <2 x i64> [[IV]], <i64 4, i64 4>
; CHECK-NEXT: [[CMP:%.*]] = call i1 @get.i1()
; CHECK-NEXT: br i1 [[CMP]], label [[EXIT:%.*]], label [[LOOP]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop
loop:
%iv.ptr = phi <2 x ptr> [ %iv.ptr.next, %loop ], [ %base, %entry ]
%iv = phi <2 x i64> [ %iv.next, %loop ], [ zeroinitializer, %entry ]
call void @use.v2p0(<2 x ptr> %iv.ptr)
%iv.next = add nuw nsw <2 x i64> %iv, <i64 4, i64 4>
%iv.ptr.next = getelementptr i8, <2 x ptr> %base, <2 x i64> %iv.next
%cmp = call i1 @get.i1()
br i1 %cmp, label %exit, label %loop
exit:
ret void
}
define void @different_loops(i64 %base) {
; CHECK-LABEL: define void @different_loops(
; CHECK-SAME: i64 [[BASE:%.*]]) {
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP1:%.*]]
; CHECK: loop1:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_NEXT:%.*]], [[LOOP1]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: call void @use.i64(i64 [[IV]])
; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 4
; CHECK-NEXT: [[CMP:%.*]] = call i1 @get.i1()
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP2:%.*]], label [[LOOP1]]
; CHECK: loop2:
; CHECK-NEXT: [[IV2:%.*]] = phi i64 [ [[IV2_NEXT:%.*]], [[LOOP2]] ], [ [[BASE]], [[LOOP1]] ]
; CHECK-NEXT: call void @use.i64(i64 [[IV2]])
; CHECK-NEXT: [[IV2_NEXT]] = add nuw i64 [[BASE]], [[IV_NEXT]]
; CHECK-NEXT: [[CMP2:%.*]] = call i1 @get.i1()
; CHECK-NEXT: br i1 [[CMP2]], label [[EXIT:%.*]], label [[LOOP2]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop1
loop1:
%iv = phi i64 [ %iv.next, %loop1 ], [ 0, %entry ]
call void @use.i64(i64 %iv)
%iv.next = add nuw nsw i64 %iv, 4
%cmp = call i1 @get.i1()
br i1 %cmp, label %loop2, label %loop1
loop2:
%iv2 = phi i64 [ %iv2.next, %loop2 ], [ %base, %loop1 ]
call void @use.i64(i64 %iv2)
%iv2.next = add nuw i64 %base, %iv.next
%cmp2 = call i1 @get.i1()
br i1 %cmp2, label %exit, label %loop2
exit:
ret void
}
declare void @use.p0(ptr)
declare void @use.v2p0(<2 x ptr>)
declare void @use.i64(i64)
declare void @use.v2i64(<2 x i64>)
declare i1 @get.i1()
declare i64 @get.i64()
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