[llvm] b044f76 - [Test] Add test with loops guarded by trivial conditions
Max Kazantsev via llvm-commits
llvm-commits at lists.llvm.org
Tue Mar 16 05:47:02 PDT 2021
Author: Max Kazantsev
Date: 2021-03-16T19:46:36+07:00
New Revision: b044f76bc8d678eb4916abd3842c533351d2962e
URL: https://github.com/llvm/llvm-project/commit/b044f76bc8d678eb4916abd3842c533351d2962e
DIFF: https://github.com/llvm/llvm-project/commit/b044f76bc8d678eb4916abd3842c533351d2962e.diff
LOG: [Test] Add test with loops guarded by trivial conditions
Added:
llvm/test/Transforms/IndVarSimplify/trivial-guard.ll
Modified:
Removed:
################################################################################
diff --git a/llvm/test/Transforms/IndVarSimplify/trivial-guard.ll b/llvm/test/Transforms/IndVarSimplify/trivial-guard.ll
new file mode 100644
index 000000000000..7506259aa7a3
--- /dev/null
+++ b/llvm/test/Transforms/IndVarSimplify/trivial-guard.ll
@@ -0,0 +1,139 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -indvars -S < %s | FileCheck %s
+; RUN: opt -passes=indvars -S < %s | FileCheck %s
+
+declare i1 @cond()
+
+define void @test_01(i32 %x) {
+; CHECK-LABEL: @test_01(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br i1 true, label [[LOOP_1_PREHEADER:%.*]], label [[LOOP_2_PREHEADER:%.*]]
+; CHECK: loop.2.preheader:
+; CHECK-NEXT: br label [[LOOP_2:%.*]]
+; CHECK: loop.1.preheader:
+; CHECK-NEXT: br label [[LOOP_1:%.*]]
+; CHECK: loop.1:
+; CHECK-NEXT: [[IV_1:%.*]] = phi i32 [ [[IV_NEXT_1:%.*]], [[GUARDED_1:%.*]] ], [ 0, [[LOOP_1_PREHEADER]] ]
+; CHECK-NEXT: [[CHECK_1:%.*]] = icmp slt i32 [[IV_1]], [[X:%.*]]
+; CHECK-NEXT: br i1 [[CHECK_1]], label [[GUARDED_1]], label [[FAIL_LOOPEXIT:%.*]]
+; CHECK: guarded.1:
+; CHECK-NEXT: [[IV_NEXT_1]] = add nuw i32 [[IV_1]], 1
+; CHECK-NEXT: [[LOOP_COND_1:%.*]] = call i1 @cond()
+; CHECK-NEXT: br i1 [[LOOP_COND_1]], label [[LOOP_1]], label [[EXIT_LOOPEXIT:%.*]]
+; CHECK: loop.2:
+; CHECK-NEXT: [[IV_2:%.*]] = phi i32 [ [[IV_NEXT_2:%.*]], [[GUARDED_2:%.*]] ], [ 0, [[LOOP_2_PREHEADER]] ]
+; CHECK-NEXT: [[CHECK_2:%.*]] = icmp slt i32 [[IV_2]], [[X]]
+; CHECK-NEXT: br i1 [[CHECK_2]], label [[GUARDED_2]], label [[FAIL_LOOPEXIT1:%.*]]
+; CHECK: guarded.2:
+; CHECK-NEXT: [[IV_NEXT_2]] = add nuw i32 [[IV_2]], 1
+; CHECK-NEXT: [[LOOP_COND_2:%.*]] = call i1 @cond()
+; CHECK-NEXT: br i1 [[LOOP_COND_2]], label [[LOOP_2]], label [[EXIT_LOOPEXIT2:%.*]]
+; CHECK: exit.loopexit:
+; CHECK-NEXT: br label [[EXIT:%.*]]
+; CHECK: exit.loopexit2:
+; CHECK-NEXT: br label [[EXIT]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+; CHECK: fail.loopexit:
+; CHECK-NEXT: br label [[FAIL:%.*]]
+; CHECK: fail.loopexit1:
+; CHECK-NEXT: br label [[FAIL]]
+; CHECK: fail:
+; CHECK-NEXT: unreachable
+;
+entry:
+ br i1 true, label %loop.1, label %loop.2
+
+loop.1:
+ %iv.1 = phi i32 [0, %entry], [%iv.next.1, %guarded.1]
+ %check.1 = icmp slt i32 %iv.1, %x
+ br i1 %check.1, label %guarded.1, label %fail
+
+guarded.1:
+ %iv.next.1 = add i32 %iv.1, 1
+ %loop.cond.1 = call i1 @cond()
+ br i1 %loop.cond.1, label %loop.1, label %exit
+
+loop.2:
+ %iv.2 = phi i32 [0, %entry], [%iv.next.2, %guarded.2]
+ %check.2 = icmp slt i32 %iv.2, %x
+ br i1 %check.2, label %guarded.2, label %fail
+
+guarded.2:
+ %iv.next.2 = add i32 %iv.2, 1
+ %loop.cond.2 = call i1 @cond()
+ br i1 %loop.cond.2, label %loop.2, label %exit
+
+exit:
+ ret void
+
+fail:
+ unreachable
+}
+
+define void @test_02(i32 %x) {
+; CHECK-LABEL: @test_02(
+; CHECK-NEXT: entry:
+; CHECK-NEXT: br i1 false, label [[LOOP_1_PREHEADER:%.*]], label [[LOOP_2_PREHEADER:%.*]]
+; CHECK: loop.2.preheader:
+; CHECK-NEXT: br label [[LOOP_2:%.*]]
+; CHECK: loop.1.preheader:
+; CHECK-NEXT: br label [[LOOP_1:%.*]]
+; CHECK: loop.1:
+; CHECK-NEXT: [[IV_1:%.*]] = phi i32 [ [[IV_NEXT_1:%.*]], [[GUARDED_1:%.*]] ], [ 0, [[LOOP_1_PREHEADER]] ]
+; CHECK-NEXT: [[CHECK_1:%.*]] = icmp slt i32 [[IV_1]], [[X:%.*]]
+; CHECK-NEXT: br i1 [[CHECK_1]], label [[GUARDED_1]], label [[FAIL_LOOPEXIT:%.*]]
+; CHECK: guarded.1:
+; CHECK-NEXT: [[IV_NEXT_1]] = add nuw i32 [[IV_1]], 1
+; CHECK-NEXT: [[LOOP_COND_1:%.*]] = call i1 @cond()
+; CHECK-NEXT: br i1 [[LOOP_COND_1]], label [[LOOP_1]], label [[EXIT_LOOPEXIT:%.*]]
+; CHECK: loop.2:
+; CHECK-NEXT: [[IV_2:%.*]] = phi i32 [ [[IV_NEXT_2:%.*]], [[GUARDED_2:%.*]] ], [ 0, [[LOOP_2_PREHEADER]] ]
+; CHECK-NEXT: [[CHECK_2:%.*]] = icmp slt i32 [[IV_2]], [[X]]
+; CHECK-NEXT: br i1 [[CHECK_2]], label [[GUARDED_2]], label [[FAIL_LOOPEXIT1:%.*]]
+; CHECK: guarded.2:
+; CHECK-NEXT: [[IV_NEXT_2]] = add nuw i32 [[IV_2]], 1
+; CHECK-NEXT: [[LOOP_COND_2:%.*]] = call i1 @cond()
+; CHECK-NEXT: br i1 [[LOOP_COND_2]], label [[LOOP_2]], label [[EXIT_LOOPEXIT2:%.*]]
+; CHECK: exit.loopexit:
+; CHECK-NEXT: br label [[EXIT:%.*]]
+; CHECK: exit.loopexit2:
+; CHECK-NEXT: br label [[EXIT]]
+; CHECK: exit:
+; CHECK-NEXT: ret void
+; CHECK: fail.loopexit:
+; CHECK-NEXT: br label [[FAIL:%.*]]
+; CHECK: fail.loopexit1:
+; CHECK-NEXT: br label [[FAIL]]
+; CHECK: fail:
+; CHECK-NEXT: unreachable
+;
+entry:
+ br i1 false, label %loop.1, label %loop.2
+
+loop.1:
+ %iv.1 = phi i32 [0, %entry], [%iv.next.1, %guarded.1]
+ %check.1 = icmp slt i32 %iv.1, %x
+ br i1 %check.1, label %guarded.1, label %fail
+
+guarded.1:
+ %iv.next.1 = add i32 %iv.1, 1
+ %loop.cond.1 = call i1 @cond()
+ br i1 %loop.cond.1, label %loop.1, label %exit
+
+loop.2:
+ %iv.2 = phi i32 [0, %entry], [%iv.next.2, %guarded.2]
+ %check.2 = icmp slt i32 %iv.2, %x
+ br i1 %check.2, label %guarded.2, label %fail
+
+guarded.2:
+ %iv.next.2 = add i32 %iv.2, 1
+ %loop.cond.2 = call i1 @cond()
+ br i1 %loop.cond.2, label %loop.2, label %exit
+
+exit:
+ ret void
+
+fail:
+ unreachable
+}
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