[llvm] r354101 - [TEST] Update test comments, refactor checks with update_test_checks.py
Max Kazantsev via llvm-commits
llvm-commits at lists.llvm.org
Thu Feb 14 23:06:52 PST 2019
Author: mkazantsev
Date: Thu Feb 14 23:06:52 2019
New Revision: 354101
URL: http://llvm.org/viewvc/llvm-project?rev=354101&view=rev
Log:
[TEST] Update test comments, refactor checks with update_test_checks.py
This patch changes messages in guards-related tests to adequately reflect
reality.
Modified:
llvm/trunk/test/Transforms/LICM/guards.ll
Modified: llvm/trunk/test/Transforms/LICM/guards.ll
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LICM/guards.ll?rev=354101&r1=354100&r2=354101&view=diff
==============================================================================
--- llvm/trunk/test/Transforms/LICM/guards.ll (original)
+++ llvm/trunk/test/Transforms/LICM/guards.ll Thu Feb 14 23:06:52 2019
@@ -1,3 +1,4 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; REQUIRES: asserts
; RUN: opt -licm -basicaa -ipt-expensive-asserts=true < %s -S | FileCheck %s
; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' -ipt-expensive-asserts=true < %s -S | FileCheck %s
@@ -5,10 +6,15 @@
; Hoist guard and load.
define void @test1(i1 %cond, i32* %ptr) {
; CHECK-LABEL: @test1(
-; CHECK-LABEL: entry:
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %cond)
-; CHECK: %val = load i32, i32* %ptr
-; CHECK-LABEL: loop:
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND:%.*]]) [ "deopt"(i32 0) ]
+; CHECK-NEXT: [[VAL:%.*]] = load i32, i32* [[PTR:%.*]]
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
+; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
+; CHECK-NEXT: br label [[LOOP]]
+;
entry:
br label %loop
@@ -24,10 +30,16 @@ loop:
; Can't hoist over a side effect
define void @test2(i1 %cond, i32* %ptr) {
; CHECK-LABEL: @test2(
-; CHECK-LABEL: entry:
-; CHECK-LABEL: loop:
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %cond)
-; CHECK: %val = load i32, i32* %ptr
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
+; CHECK-NEXT: store i32 0, i32* [[PTR:%.*]]
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND:%.*]]) [ "deopt"(i32 0) ]
+; CHECK-NEXT: [[VAL:%.*]] = load i32, i32* [[PTR]]
+; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
+; CHECK-NEXT: br label [[LOOP]]
+;
entry:
br label %loop
@@ -44,10 +56,17 @@ loop:
; Can't hoist over a side effect
define void @test2b(i1 %cond, i32* %ptr) {
; CHECK-LABEL: @test2b(
-; CHECK-LABEL: entry:
-; CHECK-LABEL: loop:
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %cond)
-; CHECK: %val = load i32, i32* %ptr
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[P2:%.*]] = getelementptr i32, i32* [[PTR:%.*]], i32 1
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
+; CHECK-NEXT: store i32 0, i32* [[P2]]
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND:%.*]]) [ "deopt"(i32 0) ]
+; CHECK-NEXT: [[VAL:%.*]] = load i32, i32* [[PTR]]
+; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
+; CHECK-NEXT: br label [[LOOP]]
+;
entry:
br label %loop
@@ -62,15 +81,19 @@ loop:
br label %loop
}
-
; Hoist guard. Cannot hoist load because of aliasing.
define void @test3(i1 %cond, i32* %ptr) {
; CHECK-LABEL: @test3(
-; CHECK-LABEL: entry:
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %cond)
-; CHECK-LABEL: loop:
-; CHECK: %val = load i32, i32* %ptr
-; CHECK: store i32 0, i32* %ptr
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[COND:%.*]]) [ "deopt"(i32 0) ]
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[X:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[X_INC:%.*]], [[LOOP]] ]
+; CHECK-NEXT: [[VAL:%.*]] = load i32, i32* [[PTR:%.*]]
+; CHECK-NEXT: store i32 0, i32* [[PTR]]
+; CHECK-NEXT: [[X_INC]] = add i32 [[X]], [[VAL]]
+; CHECK-NEXT: br label [[LOOP]]
+;
entry:
br label %loop
@@ -84,16 +107,28 @@ loop:
br label %loop
}
-
+; Hoist load and guard.
define void @test4(i1 %c, i32* %p) {
-
; CHECK-LABEL: @test4(
-; CHECK-LABEL: entry:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
-; CHECK-LABEL: loop:
-; CHECK-LABEL: backedge:
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
+; CHECK: if.true:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: if.false:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
@@ -122,16 +157,27 @@ exit:
; Do not hoist across a conditionally executed side effect.
define void @test4a(i1 %c, i32* %p, i32* %q) {
-
; CHECK-LABEL: @test4a(
-; CHECK-LABEL: entry:
-; CHECK-LABEL: loop:
-; CHECK-LABEL: if.true:
-; CHECK: store
-; CHECK-LABEL: backedge:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
+; CHECK: if.true:
+; CHECK-NEXT: store i32 123, i32* [[Q:%.*]]
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: if.false:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
@@ -161,15 +207,26 @@ exit:
; Do not hoist a conditionally executed guard.
define void @test4b(i1 %c, i32* %p, i32* %q) {
-
; CHECK-LABEL: @test4b(
-; CHECK-LABEL: entry:
-; CHECK-LABEL: loop:
-; CHECK-LABEL: if.true:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
-; CHECK-LABEL: backedge:
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
+; CHECK: if.true:
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: if.false:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
@@ -196,16 +253,29 @@ exit:
ret void
}
-; Check that we don't hoist across a store in the header.
+; Hoist store, load and guard.
define void @test4c(i1 %c, i32* %p, i8* noalias %s) {
-
; CHECK-LABEL: @test4c(
-; CHECK-LABEL: entry:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
-; CHECK-LABEL: loop:
-; CHECK-LABEL: backedge:
+; CHECK-NEXT: entry:
+; CHECK-NEXT: store i8 0, i8* [[S:%.*]]
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
+; CHECK: if.true:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: if.false:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
@@ -233,16 +303,29 @@ exit:
ret void
}
-; Check that we don't hoist across a store in a conditionally execute block.
+; Check that we don't hoist across a store in a conditionally executed block.
define void @test4d(i1 %c, i32* %p, i8* noalias %s) {
-
; CHECK-LABEL: @test4d(
-; CHECK-LABEL: entry:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK-LABEL: loop:
-; CHECK-LABEL: backedge:
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
+; CHECK: if.true:
+; CHECK-NEXT: store i8 0, i8* [[S:%.*]]
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: if.false:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
@@ -272,15 +355,27 @@ exit:
; Check that we don't hoist across a store before the guard in the backedge.
define void @test4e(i1 %c, i32* %p, i8* noalias %s) {
-
; CHECK-LABEL: @test4e(
-; CHECK-LABEL: entry:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK: store i8 0, i8* %s
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
-; CHECK-LABEL: loop:
-; CHECK-LABEL: backedge:
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: store i8 0, i8* [[S:%.*]]
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
+; CHECK: if.true:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: if.false:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
@@ -310,14 +405,27 @@ exit:
; Check that we can hoist the guard in spite of store which happens after.
define void @test4f(i1 %c, i32* %p, i8* noalias %s) {
-
; CHECK-LABEL: @test4f(
-; CHECK-LABEL: entry:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
-; CHECK-LABEL: loop:
-; CHECK-LABEL: backedge:
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: store i8 0, i8* [[S:%.*]]
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_TRUE:%.*]], label [[IF_FALSE:%.*]]
+; CHECK: if.true:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: if.false:
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
@@ -347,15 +455,24 @@ exit:
; Do not hoist an invariant guard across a variant guard.
define void @test5(i1 %c, i32* %p, i32* %q) {
-
; CHECK-LABEL: @test5(
-; CHECK-LABEL: entry:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK-LABEL: loop:
-; CHECK: %variant_cond = icmp ne i32 %a, %iv
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %variant_cond)
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: [[VARIANT_COND:%.*]] = icmp ne i32 [[A]], [[IV]]
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[VARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
@@ -380,15 +497,24 @@ exit:
; Hoist an invariant guard, leave the following variant guard in the loop.
define void @test5a(i1 %c, i32* %p, i32* %q) {
-
; CHECK-LABEL: @test5a(
-; CHECK-LABEL: entry:
-; CHECK: %a = load i32, i32* %p
-; CHECK: %invariant_cond = icmp ne i32 %a, 100
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %invariant_cond)
-; CHECK-LABEL: loop:
-; CHECK: %variant_cond = icmp ne i32 %a, %iv
-; CHECK: call void (i1, ...) @llvm.experimental.guard(i1 %variant_cond)
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[A:%.*]] = load i32, i32* [[P:%.*]]
+; CHECK-NEXT: [[INVARIANT_COND:%.*]] = icmp ne i32 [[A]], 100
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[INVARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: br label [[LOOP:%.*]]
+; CHECK: loop:
+; CHECK-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[BACKEDGE:%.*]] ]
+; CHECK-NEXT: [[IV_NEXT]] = add i32 [[IV]], 1
+; CHECK-NEXT: [[VARIANT_COND:%.*]] = icmp ne i32 [[A]], [[IV]]
+; CHECK-NEXT: call void (i1, ...) @llvm.experimental.guard(i1 [[VARIANT_COND]]) [ "deopt"() ]
+; CHECK-NEXT: br label [[BACKEDGE]]
+; CHECK: backedge:
+; CHECK-NEXT: [[LOOP_COND:%.*]] = icmp slt i32 [[IV_NEXT]], 1000
+; CHECK-NEXT: br i1 [[LOOP_COND]], label [[LOOP]], label [[EXIT:%.*]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+;
entry:
br label %loop
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