Revert "Temporarily Revert "Add basic loop fusion pass.""

The reversion apparently deleted the test/Transforms directory.

Will be re-reverting again.

llvm-svn: 358552

1 files changed, 44 insertions, 0 deletions

diff --git a/llvm/test/Transforms/LowerWidenableCondition/basic.ll b/llvm/test/Transforms/LowerWidenableCondition/basic.ll
new file mode 100644
index 00000000000..9779efc8846
--- /dev/null
+++ b/llvm/test/Transforms/LowerWidenableCondition/basic.ll
@@ -0,0 +1,44 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
+; RUN: opt -S -lower-widenable-condition < %s        | FileCheck %s
+; RUN: opt -S -passes=lower-widenable-condition < %s | FileCheck %s
+
+; Basic test case: make sure that all widenable conditions turn into i1 true.
+define void @f_0(i1 %cond_0, i1 %cond_1) {
+; CHECK-LABEL: @f_0(
+; CHECK-NEXT:  entry:
+; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND:%.*]] = and i1 [[COND_0:%.*]], true
+; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND]], label [[GUARDED:%.*]], label [[DEOPT:%.*]]
+; CHECK:       deopt:
+; CHECK-NEXT:    unreachable
+; CHECK:       guarded:
+; CHECK-NEXT:    [[EXIPLICIT_GUARD_COND4:%.*]] = and i1 [[COND_1:%.*]], true
+; CHECK-NEXT:    br i1 [[EXIPLICIT_GUARD_COND4]], label [[GUARDED1:%.*]], label [[DEOPT2:%.*]]
+; CHECK:       deopt2:
+; CHECK-NEXT:    unreachable
+; CHECK:       guarded1:
+; CHECK-NEXT:    ret void
+;
+entry:
+  %widenable_cond = call i1 @llvm.experimental.widenable.condition()
+  %exiplicit_guard_cond = and i1 %cond_0, %widenable_cond
+  br i1 %exiplicit_guard_cond, label %guarded, label %deopt
+
+deopt:                                            ; preds = %entry
+  unreachable
+
+guarded:                                          ; preds = %entry
+  %widenable_cond3 = call i1 @llvm.experimental.widenable.condition()
+  %exiplicit_guard_cond4 = and i1 %cond_1, %widenable_cond3
+  br i1 %exiplicit_guard_cond4, label %guarded1, label %deopt2
+
+deopt2:                                           ; preds = %guarded
+  unreachable
+
+guarded1:                                         ; preds = %guarded
+  ret void
+}
+
+; Function Attrs: inaccessiblememonly nounwind
+declare i1 @llvm.experimental.widenable.condition() #0
+
+attributes #0 = { inaccessiblememonly nounwind }