[llvm] c217145 - [SCCP] Add widening test case.
Florian Hahn via llvm-commits
llvm-commits at lists.llvm.org
Thu Apr 16 14:40:00 PDT 2020
Author: Florian Hahn
Date: 2020-04-16T22:39:52+01:00
New Revision: c2171457e28130cbb61fae74ffe0d53547a7a505
URL: https://github.com/llvm/llvm-project/commit/c2171457e28130cbb61fae74ffe0d53547a7a505
DIFF: https://github.com/llvm/llvm-project/commit/c2171457e28130cbb61fae74ffe0d53547a7a505.diff
LOG: [SCCP] Add widening test case.
Added:
llvm/test/Transforms/SCCP/widening.ll
Modified:
Removed:
################################################################################
diff --git a/llvm/test/Transforms/SCCP/widening.ll b/llvm/test/Transforms/SCCP/widening.ll
new file mode 100644
index 000000000000..b475e75ed362
--- /dev/null
+++ b/llvm/test/Transforms/SCCP/widening.ll
@@ -0,0 +1,444 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt %s -sccp -S | FileCheck --check-prefix=SCCP %s
+; RUN: opt %s -ipsccp -S | FileCheck --check-prefix=IPSCCP %s
+
+; Test
diff erent widening scenarios.
+
+declare void @use(i1)
+declare i1 @cond()
+
+define void @test_2_incoming_constants(i32 %x) {
+; SCCP-LABEL: @test_2_incoming_constants(
+; SCCP-NEXT: entry:
+; SCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[EXIT:%.*]]
+; SCCP: bb1:
+; SCCP-NEXT: br label [[EXIT]]
+; SCCP: exit:
+; SCCP-NEXT: [[P:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ 1, [[BB1]] ]
+; SCCP-NEXT: [[A:%.*]] = add i32 [[P]], 1
+; SCCP-NEXT: [[T_1:%.*]] = icmp ult i32 [[A]], 20
+; SCCP-NEXT: call void @use(i1 [[T_1]])
+; SCCP-NEXT: [[F_1:%.*]] = icmp ugt i32 [[A]], 10
+; SCCP-NEXT: call void @use(i1 [[F_1]])
+; SCCP-NEXT: ret void
+;
+; IPSCCP-LABEL: @test_2_incoming_constants(
+; IPSCCP-NEXT: entry:
+; IPSCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[EXIT:%.*]]
+; IPSCCP: bb1:
+; IPSCCP-NEXT: br label [[EXIT]]
+; IPSCCP: exit:
+; IPSCCP-NEXT: [[P:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ 1, [[BB1]] ]
+; IPSCCP-NEXT: [[A:%.*]] = add i32 [[P]], 1
+; IPSCCP-NEXT: [[T_1:%.*]] = icmp ult i32 [[A]], 20
+; IPSCCP-NEXT: call void @use(i1 [[T_1]])
+; IPSCCP-NEXT: [[F_1:%.*]] = icmp ugt i32 [[A]], 10
+; IPSCCP-NEXT: call void @use(i1 [[F_1]])
+; IPSCCP-NEXT: ret void
+;
+entry:
+ %c.1 = call i1 @cond()
+ br i1 %c.1, label %bb1, label %exit
+
+bb1:
+ br label %exit
+
+exit:
+ %p = phi i32 [0, %entry], [1, %bb1]
+ %a = add i32 %p, 1
+ %t.1 = icmp ult i32 %a, 20
+ call void @use(i1 %t.1)
+ %f.1 = icmp ugt i32 %a, 10
+ call void @use(i1 %f.1)
+ ret void
+}
+
+define void @test_3_incoming_constants(i32 %x) {
+; SCCP-LABEL: @test_3_incoming_constants(
+; SCCP-NEXT: entry:
+; SCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[EXIT:%.*]]
+; SCCP: bb1:
+; SCCP-NEXT: [[C_2:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_2]], label [[BB2:%.*]], label [[EXIT]]
+; SCCP: bb2:
+; SCCP-NEXT: br label [[EXIT]]
+; SCCP: exit:
+; SCCP-NEXT: [[P:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ 1, [[BB1]] ], [ 2, [[BB2]] ]
+; SCCP-NEXT: [[A:%.*]] = add i32 [[P]], 1
+; SCCP-NEXT: [[T_1:%.*]] = icmp ult i32 [[A]], 20
+; SCCP-NEXT: call void @use(i1 [[T_1]])
+; SCCP-NEXT: [[F_1:%.*]] = icmp ugt i32 [[A]], 10
+; SCCP-NEXT: call void @use(i1 [[F_1]])
+; SCCP-NEXT: ret void
+;
+; IPSCCP-LABEL: @test_3_incoming_constants(
+; IPSCCP-NEXT: entry:
+; IPSCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[EXIT:%.*]]
+; IPSCCP: bb1:
+; IPSCCP-NEXT: [[C_2:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_2]], label [[BB2:%.*]], label [[EXIT]]
+; IPSCCP: bb2:
+; IPSCCP-NEXT: br label [[EXIT]]
+; IPSCCP: exit:
+; IPSCCP-NEXT: [[P:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ 1, [[BB1]] ], [ 2, [[BB2]] ]
+; IPSCCP-NEXT: [[A:%.*]] = add i32 [[P]], 1
+; IPSCCP-NEXT: [[T_1:%.*]] = icmp ult i32 [[A]], 20
+; IPSCCP-NEXT: call void @use(i1 [[T_1]])
+; IPSCCP-NEXT: [[F_1:%.*]] = icmp ugt i32 [[A]], 10
+; IPSCCP-NEXT: call void @use(i1 [[F_1]])
+; IPSCCP-NEXT: ret void
+;
+entry:
+ %c.1 = call i1 @cond()
+ br i1 %c.1, label %bb1, label %exit
+
+bb1:
+ %c.2 = call i1 @cond()
+ br i1 %c.2, label %bb2, label %exit
+
+bb2:
+ br label %exit
+
+exit:
+ %p = phi i32 [0, %entry], [1, %bb1], [2, %bb2]
+ %a = add i32 %p, 1
+ %t.1 = icmp ult i32 %a, 20
+ call void @use(i1 %t.1)
+ %f.1 = icmp ugt i32 %a, 10
+ call void @use(i1 %f.1)
+ ret void
+}
+
+define void @test_5_incoming_constants(i32 %x) {
+; SCCP-LABEL: @test_5_incoming_constants(
+; SCCP-NEXT: entry:
+; SCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[EXIT:%.*]]
+; SCCP: bb1:
+; SCCP-NEXT: [[C_2:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_2]], label [[BB2:%.*]], label [[EXIT]]
+; SCCP: bb2:
+; SCCP-NEXT: [[C_3:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_3]], label [[BB3:%.*]], label [[EXIT]]
+; SCCP: bb3:
+; SCCP-NEXT: [[C_4:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_4]], label [[BB4:%.*]], label [[EXIT]]
+; SCCP: bb4:
+; SCCP-NEXT: br label [[EXIT]]
+; SCCP: exit:
+; SCCP-NEXT: [[P:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ 1, [[BB1]] ], [ 2, [[BB2]] ], [ 3, [[BB3]] ], [ 4, [[BB4]] ]
+; SCCP-NEXT: [[A:%.*]] = add i32 [[P]], 1
+; SCCP-NEXT: [[T_1:%.*]] = icmp ult i32 [[A]], 20
+; SCCP-NEXT: call void @use(i1 [[T_1]])
+; SCCP-NEXT: [[F_1:%.*]] = icmp ugt i32 [[A]], 10
+; SCCP-NEXT: call void @use(i1 [[F_1]])
+; SCCP-NEXT: ret void
+;
+; IPSCCP-LABEL: @test_5_incoming_constants(
+; IPSCCP-NEXT: entry:
+; IPSCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_1]], label [[BB1:%.*]], label [[EXIT:%.*]]
+; IPSCCP: bb1:
+; IPSCCP-NEXT: [[C_2:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_2]], label [[BB2:%.*]], label [[EXIT]]
+; IPSCCP: bb2:
+; IPSCCP-NEXT: [[C_3:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_3]], label [[BB3:%.*]], label [[EXIT]]
+; IPSCCP: bb3:
+; IPSCCP-NEXT: [[C_4:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_4]], label [[BB4:%.*]], label [[EXIT]]
+; IPSCCP: bb4:
+; IPSCCP-NEXT: br label [[EXIT]]
+; IPSCCP: exit:
+; IPSCCP-NEXT: [[P:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ 1, [[BB1]] ], [ 2, [[BB2]] ], [ 3, [[BB3]] ], [ 4, [[BB4]] ]
+; IPSCCP-NEXT: [[A:%.*]] = add i32 [[P]], 1
+; IPSCCP-NEXT: [[T_1:%.*]] = icmp ult i32 [[A]], 20
+; IPSCCP-NEXT: call void @use(i1 [[T_1]])
+; IPSCCP-NEXT: [[F_1:%.*]] = icmp ugt i32 [[A]], 10
+; IPSCCP-NEXT: call void @use(i1 [[F_1]])
+; IPSCCP-NEXT: ret void
+;
+entry:
+ %c.1 = call i1 @cond()
+ br i1 %c.1, label %bb1, label %exit
+
+bb1:
+ %c.2 = call i1 @cond()
+ br i1 %c.2, label %bb2, label %exit
+
+bb2:
+ %c.3 = call i1 @cond()
+ br i1 %c.3, label %bb3, label %exit
+
+bb3:
+ %c.4 = call i1 @cond()
+ br i1 %c.4, label %bb4, label %exit
+
+bb4:
+ br label %exit
+
+exit:
+ %p = phi i32 [0, %entry], [1, %bb1], [2, %bb2], [3, %bb3], [4, %bb4]
+ %a = add i32 %p, 1
+ %t.1 = icmp ult i32 %a, 20
+ call void @use(i1 %t.1)
+ %f.1 = icmp ugt i32 %a, 10
+ call void @use(i1 %f.1)
+ ret void
+}
+
+; For the rotated_loop_* test cases %p and %a are extended on each iteration.
+
+define void @rotated_loop_2(i32 %x) {
+; SCCP-LABEL: @rotated_loop_2(
+; SCCP-NEXT: entry:
+; SCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_1]], label [[EXIT:%.*]], label [[BB1:%.*]]
+; SCCP: bb1:
+; SCCP-NEXT: [[C_2:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_2]], label [[EXIT]], label [[BB2:%.*]]
+; SCCP: bb2:
+; SCCP-NEXT: [[C_3:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_3]], label [[BB3:%.*]], label [[EXIT]]
+; SCCP: bb3:
+; SCCP-NEXT: br label [[EXIT]]
+; SCCP: exit:
+; SCCP-NEXT: [[P:%.*]] = phi i32 [ 1, [[ENTRY:%.*]] ], [ 3, [[BB1]] ], [ 2, [[BB2]] ], [ 5, [[BB3]] ], [ [[A:%.*]], [[EXIT]] ]
+; SCCP-NEXT: [[A]] = add i32 [[P]], 1
+; SCCP-NEXT: call void @use(i1 true)
+; SCCP-NEXT: call void @use(i1 false)
+; SCCP-NEXT: br i1 false, label [[EXIT]], label [[EXIT_1:%.*]]
+; SCCP: exit.1:
+; SCCP-NEXT: ret void
+;
+; IPSCCP-LABEL: @rotated_loop_2(
+; IPSCCP-NEXT: entry:
+; IPSCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_1]], label [[EXIT:%.*]], label [[BB1:%.*]]
+; IPSCCP: bb1:
+; IPSCCP-NEXT: [[C_2:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_2]], label [[EXIT]], label [[BB2:%.*]]
+; IPSCCP: bb2:
+; IPSCCP-NEXT: [[C_3:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_3]], label [[BB3:%.*]], label [[EXIT]]
+; IPSCCP: bb3:
+; IPSCCP-NEXT: br label [[EXIT]]
+; IPSCCP: exit:
+; IPSCCP-NEXT: [[P:%.*]] = phi i32 [ 1, [[ENTRY:%.*]] ], [ 3, [[BB1]] ], [ 2, [[BB2]] ], [ 5, [[BB3]] ], [ [[A:%.*]], [[EXIT]] ]
+; IPSCCP-NEXT: [[A]] = add i32 [[P]], 1
+; IPSCCP-NEXT: call void @use(i1 true)
+; IPSCCP-NEXT: call void @use(i1 false)
+; IPSCCP-NEXT: br i1 false, label [[EXIT]], label [[EXIT_1:%.*]]
+; IPSCCP: exit.1:
+; IPSCCP-NEXT: ret void
+;
+entry:
+ %c.1 = call i1 @cond()
+ br i1 %c.1, label %exit, label %bb1
+
+bb1:
+ %c.2 = call i1 @cond()
+ br i1 %c.2, label %exit, label %bb2
+
+bb2:
+ %c.3 = call i1 @cond()
+ br i1 %c.3, label %bb3, label %exit
+
+bb3:
+ br label %exit
+
+exit:
+ %p = phi i32 [1, %entry], [3, %bb1], [2, %bb2], [5, %bb3], [%a, %exit]
+ %a = add i32 %p, 1
+ %t.1 = icmp ult i32 %a, 20
+ call void @use(i1 %t.1)
+ %f.1 = icmp ugt i32 %a, 10
+ call void @use(i1 %f.1)
+ %c.4 = icmp ult i32 %a, 2
+ br i1 %c.4, label %exit, label %exit.1
+
+exit.1:
+ ret void
+}
+
+define void @rotated_loop_3(i32 %x) {
+; SCCP-LABEL: @rotated_loop_3(
+; SCCP-NEXT: entry:
+; SCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_1]], label [[EXIT:%.*]], label [[BB1:%.*]]
+; SCCP: bb1:
+; SCCP-NEXT: [[C_2:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_2]], label [[EXIT]], label [[BB2:%.*]]
+; SCCP: bb2:
+; SCCP-NEXT: [[C_3:%.*]] = call i1 @cond()
+; SCCP-NEXT: br i1 [[C_3]], label [[BB3:%.*]], label [[EXIT]]
+; SCCP: bb3:
+; SCCP-NEXT: br label [[EXIT]]
+; SCCP: exit:
+; SCCP-NEXT: [[P:%.*]] = phi i32 [ 1, [[ENTRY:%.*]] ], [ 3, [[BB1]] ], [ 2, [[BB2]] ], [ 5, [[BB3]] ], [ [[A:%.*]], [[EXIT]] ]
+; SCCP-NEXT: [[A]] = add i32 [[P]], 1
+; SCCP-NEXT: [[T_1:%.*]] = icmp ult i32 [[A]], 20
+; SCCP-NEXT: call void @use(i1 [[T_1]])
+; SCCP-NEXT: [[F_1:%.*]] = icmp ugt i32 [[A]], 10
+; SCCP-NEXT: call void @use(i1 [[F_1]])
+; SCCP-NEXT: [[C_4:%.*]] = icmp ult i32 [[A]], 3
+; SCCP-NEXT: br i1 [[C_4]], label [[EXIT]], label [[EXIT_1:%.*]]
+; SCCP: exit.1:
+; SCCP-NEXT: ret void
+;
+; IPSCCP-LABEL: @rotated_loop_3(
+; IPSCCP-NEXT: entry:
+; IPSCCP-NEXT: [[C_1:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_1]], label [[EXIT:%.*]], label [[BB1:%.*]]
+; IPSCCP: bb1:
+; IPSCCP-NEXT: [[C_2:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_2]], label [[EXIT]], label [[BB2:%.*]]
+; IPSCCP: bb2:
+; IPSCCP-NEXT: [[C_3:%.*]] = call i1 @cond()
+; IPSCCP-NEXT: br i1 [[C_3]], label [[BB3:%.*]], label [[EXIT]]
+; IPSCCP: bb3:
+; IPSCCP-NEXT: br label [[EXIT]]
+; IPSCCP: exit:
+; IPSCCP-NEXT: [[P:%.*]] = phi i32 [ 1, [[ENTRY:%.*]] ], [ 3, [[BB1]] ], [ 2, [[BB2]] ], [ 5, [[BB3]] ], [ [[A:%.*]], [[EXIT]] ]
+; IPSCCP-NEXT: [[A]] = add i32 [[P]], 1
+; IPSCCP-NEXT: [[T_1:%.*]] = icmp ult i32 [[A]], 20
+; IPSCCP-NEXT: call void @use(i1 [[T_1]])
+; IPSCCP-NEXT: [[F_1:%.*]] = icmp ugt i32 [[A]], 10
+; IPSCCP-NEXT: call void @use(i1 [[F_1]])
+; IPSCCP-NEXT: [[C_4:%.*]] = icmp ult i32 [[A]], 3
+; IPSCCP-NEXT: br i1 [[C_4]], label [[EXIT]], label [[EXIT_1:%.*]]
+; IPSCCP: exit.1:
+; IPSCCP-NEXT: ret void
+;
+entry:
+ %c.1 = call i1 @cond()
+ br i1 %c.1, label %exit, label %bb1
+
+bb1:
+ %c.2 = call i1 @cond()
+ br i1 %c.2, label %exit, label %bb2
+
+bb2:
+ %c.3 = call i1 @cond()
+ br i1 %c.3, label %bb3, label %exit
+
+bb3:
+ br label %exit
+
+exit:
+ %p = phi i32 [1, %entry], [3, %bb1], [2, %bb2], [5, %bb3], [%a, %exit]
+ %a = add i32 %p, 1
+ %t.1 = icmp ult i32 %a, 20
+ call void @use(i1 %t.1)
+ %f.1 = icmp ugt i32 %a, 10
+ call void @use(i1 %f.1)
+ %c.4 = icmp ult i32 %a, 3
+ br i1 %c.4, label %exit, label %exit.1
+
+exit.1:
+ ret void
+}
+
+; For the loop_with_header_* tests, %iv and %a change on each iteration, but we
+; can use the range imposed by the condition %c.1 when widening.
+define void @loop_with_header_1(i32 %x) {
+; SCCP-LABEL: @loop_with_header_1(
+; SCCP-NEXT: entry:
+; SCCP-NEXT: br label [[LOOP_HEADER:%.*]]
+; SCCP: loop.header:
+; SCCP-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_BODY:%.*]] ]
+; SCCP-NEXT: [[C_1:%.*]] = icmp slt i32 [[IV]], 2
+; SCCP-NEXT: br i1 [[C_1]], label [[LOOP_BODY]], label [[EXIT:%.*]]
+; SCCP: loop.body:
+; SCCP-NEXT: [[T_1:%.*]] = icmp slt i32 [[IV]], 2
+; SCCP-NEXT: call void @use(i1 [[T_1]])
+; SCCP-NEXT: [[IV_NEXT]] = add nsw i32 [[IV]], 1
+; SCCP-NEXT: br label [[LOOP_HEADER]]
+; SCCP: exit:
+; SCCP-NEXT: ret void
+;
+; IPSCCP-LABEL: @loop_with_header_1(
+; IPSCCP-NEXT: entry:
+; IPSCCP-NEXT: br label [[LOOP_HEADER:%.*]]
+; IPSCCP: loop.header:
+; IPSCCP-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_BODY:%.*]] ]
+; IPSCCP-NEXT: [[C_1:%.*]] = icmp slt i32 [[IV]], 2
+; IPSCCP-NEXT: br i1 [[C_1]], label [[LOOP_BODY]], label [[EXIT:%.*]]
+; IPSCCP: loop.body:
+; IPSCCP-NEXT: [[T_1:%.*]] = icmp slt i32 [[IV]], 2
+; IPSCCP-NEXT: call void @use(i1 [[T_1]])
+; IPSCCP-NEXT: [[IV_NEXT]] = add nsw i32 [[IV]], 1
+; IPSCCP-NEXT: br label [[LOOP_HEADER]]
+; IPSCCP: exit:
+; IPSCCP-NEXT: ret void
+;
+entry:
+ br label %loop.header
+
+loop.header:
+ %iv = phi i32 [0, %entry], [%iv.next, %loop.body]
+ %c.1 = icmp slt i32 %iv, 2
+ br i1 %c.1, label %loop.body, label %exit
+
+loop.body:
+ %t.1 = icmp slt i32 %iv, 2
+ call void @use(i1 %t.1)
+ %iv.next = add nsw i32 %iv, 1
+ br label %loop.header
+
+exit:
+ ret void
+}
+
+define void @loop_with_header_2(i32 %x) {
+; SCCP-LABEL: @loop_with_header_2(
+; SCCP-NEXT: entry:
+; SCCP-NEXT: br label [[LOOP_HEADER:%.*]]
+; SCCP: loop.header:
+; SCCP-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_BODY:%.*]] ]
+; SCCP-NEXT: [[C_1:%.*]] = icmp slt i32 [[IV]], 200
+; SCCP-NEXT: br i1 [[C_1]], label [[LOOP_BODY]], label [[EXIT:%.*]]
+; SCCP: loop.body:
+; SCCP-NEXT: [[T_1:%.*]] = icmp slt i32 [[IV]], 200
+; SCCP-NEXT: call void @use(i1 [[T_1]])
+; SCCP-NEXT: [[IV_NEXT]] = add nsw i32 [[IV]], 1
+; SCCP-NEXT: br label [[LOOP_HEADER]]
+; SCCP: exit:
+; SCCP-NEXT: ret void
+;
+; IPSCCP-LABEL: @loop_with_header_2(
+; IPSCCP-NEXT: entry:
+; IPSCCP-NEXT: br label [[LOOP_HEADER:%.*]]
+; IPSCCP: loop.header:
+; IPSCCP-NEXT: [[IV:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[IV_NEXT:%.*]], [[LOOP_BODY:%.*]] ]
+; IPSCCP-NEXT: [[C_1:%.*]] = icmp slt i32 [[IV]], 200
+; IPSCCP-NEXT: br i1 [[C_1]], label [[LOOP_BODY]], label [[EXIT:%.*]]
+; IPSCCP: loop.body:
+; IPSCCP-NEXT: [[T_1:%.*]] = icmp slt i32 [[IV]], 200
+; IPSCCP-NEXT: call void @use(i1 [[T_1]])
+; IPSCCP-NEXT: [[IV_NEXT]] = add nsw i32 [[IV]], 1
+; IPSCCP-NEXT: br label [[LOOP_HEADER]]
+; IPSCCP: exit:
+; IPSCCP-NEXT: ret void
+;
+entry:
+ br label %loop.header
+
+loop.header:
+ %iv = phi i32 [0, %entry], [%iv.next, %loop.body]
+ %c.1 = icmp slt i32 %iv, 200
+ br i1 %c.1, label %loop.body, label %exit
+
+loop.body:
+ %t.1 = icmp slt i32 %iv, 200
+ call void @use(i1 %t.1)
+ %iv.next = add nsw i32 %iv, 1
+ br label %loop.header
+
+exit:
+ ret void
+}
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