[llvm] 4481030 - [Loads] Use use-dereferenceable-at-point-semantics=1 in test.
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Thu Jan 16 04:50:31 PST 2025
Author: Florian Hahn
Date: 2025-01-16T12:49:50Z
New Revision: 4481030a0388a98d1d426d86bed0ac012dfe3b6b
URL: https://github.com/llvm/llvm-project/commit/4481030a0388a98d1d426d86bed0ac012dfe3b6b
DIFF: https://github.com/llvm/llvm-project/commit/4481030a0388a98d1d426d86bed0ac012dfe3b6b.diff
LOG: [Loads] Use use-dereferenceable-at-point-semantics=1 in test.
Update the test to use use-dereferenceable-at-point-semantics=1.
Existing tests are updated with the nofree attribute and a new one has
been added showing that the dereferenceable assumption is used after the
pointer may be freed.
Added:
Modified:
llvm/test/Transforms/LoopVectorize/dereferenceable-info-from-assumption-constant-size.ll
Removed:
################################################################################
diff --git a/llvm/test/Transforms/LoopVectorize/dereferenceable-info-from-assumption-constant-size.ll b/llvm/test/Transforms/LoopVectorize/dereferenceable-info-from-assumption-constant-size.ll
index 815e6bce52c0a1..572511a5ffb926 100644
--- a/llvm/test/Transforms/LoopVectorize/dereferenceable-info-from-assumption-constant-size.ll
+++ b/llvm/test/Transforms/LoopVectorize/dereferenceable-info-from-assumption-constant-size.ll
@@ -1,11 +1,11 @@
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
-; RUN: opt -p loop-vectorize -force-vector-width=2 -S %s | FileCheck %s
+; RUN: opt -p loop-vectorize -force-vector-width=2 -use-dereferenceable-at-point-semantics=1 -S %s | FileCheck %s
declare void @llvm.assume(i1)
-define void @deref_assumption_in_header_constant_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_header_constant_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_header_constant_trip_count(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1:[0-9]+]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
@@ -104,9 +104,9 @@ exit:
ret void
}
-define void @align_deref_assumption_in_header_constant_trip_count_loop_invariant_ptr(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @align_deref_assumption_in_header_constant_trip_count_loop_invariant_ptr(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @align_deref_assumption_in_header_constant_trip_count_loop_invariant_ptr(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[A]], i64 4), "dereferenceable"(ptr [[A]], i64 4) ]
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
@@ -181,9 +181,9 @@ exit:
ret void
}
-define void @deref_assumption_too_small_in_header_constant_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_too_small_in_header_constant_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_too_small_in_header_constant_trip_count(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
@@ -282,9 +282,9 @@ exit:
ret void
}
-define void @deref_assumption_in_header_constant_trip_count_align_1(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_header_constant_trip_count_align_1(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_header_constant_trip_count_align_1(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
@@ -383,9 +383,9 @@ exit:
ret void
}
-define void @deref_assumption_in_header_constant_trip_count_align_via_arg_attribute(ptr noalias align 4 %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_header_constant_trip_count_align_via_arg_attribute(ptr noalias align 4 %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_header_constant_trip_count_align_via_arg_attribute(
-; CHECK-SAME: ptr noalias align 4 [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias align 4 [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
@@ -484,9 +484,9 @@ exit:
ret void
}
-define void @deref_assumption_in_header_constant_trip_count_align_not_known(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_header_constant_trip_count_align_not_known(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_header_constant_trip_count_align_not_known(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
@@ -585,9 +585,9 @@ exit:
ret void
}
-define void @deref_assumption_in_then_constant_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_then_constant_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_then_constant_trip_count(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
@@ -682,9 +682,9 @@ exit:
ret void
}
-define void @deref_assumption_in_latch_constant_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_latch_constant_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_latch_constant_trip_count(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
; CHECK: [[VECTOR_PH]]:
@@ -785,9 +785,9 @@ exit:
ret void
}
-define void @deref_assumption_in_header_variable_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c, i64 %N) {
+define void @deref_assumption_in_header_variable_trip_count(ptr noalias %a, ptr noalias %b, ptr noalias %c, i64 %N) nofree {
; CHECK-LABEL: define void @deref_assumption_in_header_variable_trip_count(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]], i64 [[N:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]], i64 [[N:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: [[MIN_ITERS_CHECK:%.*]] = icmp ult i64 [[N]], 2
; CHECK-NEXT: br i1 [[MIN_ITERS_CHECK]], label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
@@ -890,9 +890,9 @@ exit:
ret void
}
-define void @deref_assumption_in_preheader_constant_trip_count_align_1(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_preheader_constant_trip_count_align_1(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_preheader_constant_trip_count_align_1(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[A]], i64 4000) ]
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
@@ -968,9 +968,9 @@ exit:
ret void
}
-define void @deref_assumption_too_small_in_preheader_constant_trip_count_align_1(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_too_small_in_preheader_constant_trip_count_align_1(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_too_small_in_preheader_constant_trip_count_align_1(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[A]], i64 3999) ]
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
@@ -1063,9 +1063,9 @@ exit:
ret void
}
-define void @align_and_deref_assumption_in_preheader_constant_trip_count_align_4(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @align_and_deref_assumption_in_preheader_constant_trip_count_align_4(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @align_and_deref_assumption_in_preheader_constant_trip_count_align_4(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[A]], i64 4), "dereferenceable"(ptr [[A]], i64 4000) ]
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
@@ -1142,9 +1142,9 @@ exit:
}
-define void @deref_assumption_in_preheader_constant_trip_count_align_4_known_via_argument_attr(ptr noalias align 4 %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_preheader_constant_trip_count_align_4_known_via_argument_attr(ptr noalias align 4 %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_preheader_constant_trip_count_align_4_known_via_argument_attr(
-; CHECK-SAME: ptr noalias align 4 [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias align 4 [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[A]], i64 4000) ]
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
@@ -1220,9 +1220,9 @@ exit:
ret void
}
-define void @deref_assumption_in_preheader_constant_trip_count_align_4_not_known(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_in_preheader_constant_trip_count_align_4_not_known(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_in_preheader_constant_trip_count_align_4_not_known(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[A]], i64 4000) ]
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
@@ -1315,9 +1315,9 @@ exit:
ret void
}
-define void @deref_assumption_too_small_in_preheader_constant_trip_count_align_4(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+define void @deref_assumption_too_small_in_preheader_constant_trip_count_align_4(ptr noalias %a, ptr noalias %b, ptr noalias %c) nofree {
; CHECK-LABEL: define void @deref_assumption_too_small_in_preheader_constant_trip_count_align_4(
-; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) #[[ATTR1]] {
; CHECK-NEXT: [[ENTRY:.*]]:
; CHECK-NEXT: call void @llvm.assume(i1 true) [ "dereferenceable"(ptr [[A]], i64 3999) ]
; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
@@ -1409,6 +1409,90 @@ loop.latch:
exit:
ret void
}
+
+; %a may be freeed between the dereferenceable assumption and accesses.
+; FIXME: It is not safe to use with -use-dereferenceable-at-point-semantics.
+define void @may_free_align_deref_assumption_in_header_constant_trip_count_loop_invariant_ptr(ptr noalias %a, ptr noalias %b, ptr noalias %c) {
+; CHECK-LABEL: define void @may_free_align_deref_assumption_in_header_constant_trip_count_loop_invariant_ptr(
+; CHECK-SAME: ptr noalias [[A:%.*]], ptr noalias [[B:%.*]], ptr noalias [[C:%.*]]) {
+; CHECK-NEXT: [[ENTRY:.*]]:
+; CHECK-NEXT: call void @llvm.assume(i1 true) [ "align"(ptr [[A]], i64 4), "dereferenceable"(ptr [[A]], i64 4) ]
+; CHECK-NEXT: call void @may_free()
+; CHECK-NEXT: br i1 false, label %[[SCALAR_PH:.*]], label %[[VECTOR_PH:.*]]
+; CHECK: [[VECTOR_PH]]:
+; CHECK-NEXT: br label %[[VECTOR_BODY:.*]]
+; CHECK: [[VECTOR_BODY]]:
+; CHECK-NEXT: [[INDEX:%.*]] = phi i64 [ 0, %[[VECTOR_PH]] ], [ [[INDEX_NEXT:%.*]], %[[VECTOR_BODY]] ]
+; CHECK-NEXT: [[TMP0:%.*]] = add i64 [[INDEX]], 0
+; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[TMP0]]
+; CHECK-NEXT: [[TMP2:%.*]] = getelementptr inbounds i32, ptr [[TMP1]], i32 0
+; CHECK-NEXT: [[WIDE_LOAD:%.*]] = load <2 x i32>, ptr [[TMP2]], align 4
+; CHECK-NEXT: [[TMP3:%.*]] = icmp sge <2 x i32> [[WIDE_LOAD]], zeroinitializer
+; CHECK-NEXT: [[TMP5:%.*]] = load i32, ptr [[A]], align 4
+; CHECK-NEXT: [[TMP15:%.*]] = load i32, ptr [[A]], align 4
+; CHECK-NEXT: [[TMP13:%.*]] = insertelement <2 x i32> poison, i32 [[TMP5]], i32 0
+; CHECK-NEXT: [[TMP11:%.*]] = insertelement <2 x i32> [[TMP13]], i32 [[TMP15]], i32 1
+; CHECK-NEXT: [[PREDPHI:%.*]] = select <2 x i1> [[TMP3]], <2 x i32> [[WIDE_LOAD]], <2 x i32> [[TMP11]]
+; CHECK-NEXT: [[TMP8:%.*]] = getelementptr inbounds i32, ptr [[C]], i64 [[TMP0]]
+; CHECK-NEXT: [[TMP9:%.*]] = getelementptr inbounds i32, ptr [[TMP8]], i32 0
+; CHECK-NEXT: store <2 x i32> [[PREDPHI]], ptr [[TMP9]], align 4
+; CHECK-NEXT: [[INDEX_NEXT]] = add nuw i64 [[INDEX]], 2
+; CHECK-NEXT: [[TMP10:%.*]] = icmp eq i64 [[INDEX_NEXT]], 1000
+; CHECK-NEXT: br i1 [[TMP10]], label %[[MIDDLE_BLOCK:.*]], label %[[VECTOR_BODY]], !llvm.loop [[LOOP32:![0-9]+]]
+; CHECK: [[MIDDLE_BLOCK]]:
+; CHECK-NEXT: br i1 true, label %[[EXIT:.*]], label %[[SCALAR_PH]]
+; CHECK: [[SCALAR_PH]]:
+; CHECK-NEXT: [[BC_RESUME_VAL:%.*]] = phi i64 [ 1000, %[[MIDDLE_BLOCK]] ], [ 0, %[[ENTRY]] ]
+; CHECK-NEXT: br label %[[LOOP_HEADER:.*]]
+; CHECK: [[LOOP_HEADER]]:
+; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[BC_RESUME_VAL]], %[[SCALAR_PH]] ], [ [[IV_NEXT:%.*]], %[[LOOP_LATCH:.*]] ]
+; CHECK-NEXT: [[GEP_B:%.*]] = getelementptr inbounds i32, ptr [[B]], i64 [[IV]]
+; CHECK-NEXT: [[L_B:%.*]] = load i32, ptr [[GEP_B]], align 4
+; CHECK-NEXT: [[C_1:%.*]] = icmp sge i32 [[L_B]], 0
+; CHECK-NEXT: br i1 [[C_1]], label %[[LOOP_LATCH]], label %[[LOOP_THEN:.*]]
+; CHECK: [[LOOP_THEN]]:
+; CHECK-NEXT: [[L_A:%.*]] = load i32, ptr [[A]], align 4
+; CHECK-NEXT: br label %[[LOOP_LATCH]]
+; CHECK: [[LOOP_LATCH]]:
+; CHECK-NEXT: [[MERGE:%.*]] = phi i32 [ [[L_A]], %[[LOOP_THEN]] ], [ [[L_B]], %[[LOOP_HEADER]] ]
+; CHECK-NEXT: [[GEP_C:%.*]] = getelementptr inbounds i32, ptr [[C]], i64 [[IV]]
+; CHECK-NEXT: store i32 [[MERGE]], ptr [[GEP_C]], align 4
+; CHECK-NEXT: [[IV_NEXT]] = add nuw nsw i64 [[IV]], 1
+; CHECK-NEXT: [[EC:%.*]] = icmp eq i64 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[EC]], label %[[EXIT]], label %[[LOOP_HEADER]], !llvm.loop [[LOOP33:![0-9]+]]
+; CHECK: [[EXIT]]:
+; CHECK-NEXT: ret void
+;
+entry:
+ call void @llvm.assume(i1 true) [ "align"(ptr %a, i64 4), "dereferenceable"(ptr %a, i64 4) ]
+ call void @may_free()
+ br label %loop.header
+
+loop.header:
+ %iv = phi i64 [ 0, %entry ], [ %iv.next, %loop.latch ]
+ %gep.b = getelementptr inbounds i32, ptr %b, i64 %iv
+ %l.b = load i32, ptr %gep.b, align 4
+ %c.1 = icmp sge i32 %l.b, 0
+ br i1 %c.1, label %loop.latch, label %loop.then
+
+loop.then:
+ %l.a = load i32, ptr %a, align 4
+ br label %loop.latch
+
+loop.latch:
+ %merge = phi i32 [ %l.a, %loop.then ], [ %l.b, %loop.header ]
+ %gep.c = getelementptr inbounds i32, ptr %c, i64 %iv
+ store i32 %merge, ptr %gep.c, align 4
+ %iv.next = add nuw nsw i64 %iv, 1
+ %ec = icmp eq i64 %iv.next, 1000
+ br i1 %ec, label %exit, label %loop.header
+
+exit:
+ ret void
+}
+
+declare void @may_free()
+
;.
; CHECK: [[LOOP0]] = distinct !{[[LOOP0]], [[META1:![0-9]+]], [[META2:![0-9]+]]}
; CHECK: [[META1]] = !{!"llvm.loop.isvectorized", i32 1}
@@ -1442,4 +1526,6 @@ exit:
; CHECK: [[LOOP29]] = distinct !{[[LOOP29]], [[META2]], [[META1]]}
; CHECK: [[LOOP30]] = distinct !{[[LOOP30]], [[META1]], [[META2]]}
; CHECK: [[LOOP31]] = distinct !{[[LOOP31]], [[META2]], [[META1]]}
+; CHECK: [[LOOP32]] = distinct !{[[LOOP32]], [[META1]], [[META2]]}
+; CHECK: [[LOOP33]] = distinct !{[[LOOP33]], [[META2]], [[META1]]}
;.
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