Revert "[Test] Add couple more tests where we can compute symbolic max exit count"

This reverts commit 7e3373c.

Some changes that were not supposed to be commited came with it.

Author: xortator

llvm/lib/Analysis/ScalarEvolution.cpp

@@ -13373,14 +13373,8 @@ static void PrintLoopInfo(raw_ostream &OS, ScalarEvolution *SE,
     OS << "Unpredictable constant max backedge-taken count. ";
   }
 
-  OS << "\n";
-  if (ExitingBlocks.size() > 1)
-    for (BasicBlock *ExitingBlock : ExitingBlocks) {
-      OS << "  constant max exit count for " << ExitingBlock->getName() << ": "
-         << *SE->getExitCount(L, ExitingBlock, ScalarEvolution::ConstantMaximum) << "\n";
-    }
-
-  OS << "Loop ";
+  OS << "\n"
+        "Loop ";
   L->getHeader()->printAsOperand(OS, /*PrintType=*/false);
   OS << ": ";
 

llvm/test/Analysis/ScalarEvolution/symbolic_max_exit_count.ll

@@ -20,9 +20,6 @@ define i32 @test_simple_case(i32 %start, i32 %len) {
 ; CHECK-NEXT:    exit count for range_check_block: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:    exit count for backedge: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:  Loop %loop: constant max backedge-taken count is -1
-; CHECK-NEXT:    constant max exit count for loop: -1
-; CHECK-NEXT:    constant max exit count for range_check_block: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:    constant max exit count for backedge: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:  Loop %loop: symbolic max backedge-taken count is %start
 ; CHECK-NEXT:    symbolic max exit count for loop: %start
 ; CHECK-NEXT:    symbolic max exit count for range_check_block: ***COULDNOTCOMPUTE***
@@ -83,9 +80,6 @@ define i32 @test_litter_conditions(i32 %start, i32 %len) {
 ; CHECK-NEXT:    exit count for range_check_block: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:    exit count for backedge: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:  Loop %loop: constant max backedge-taken count is -1
-; CHECK-NEXT:    constant max exit count for loop: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:    constant max exit count for range_check_block: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:    constant max exit count for backedge: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:  Loop %loop: Unpredictable symbolic max backedge-taken count.
 ; CHECK-NEXT:    symbolic max exit count for loop: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:    symbolic max exit count for range_check_block: ***COULDNOTCOMPUTE***
@@ -150,9 +144,6 @@ define i32 @test_litter_conditions_bad_context(i32 %start, i32 %len) {
 ; CHECK-NEXT:    exit count for range_check_block: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:    exit count for backedge: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:  Loop %loop: constant max backedge-taken count is -1
-; CHECK-NEXT:    constant max exit count for loop: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:    constant max exit count for range_check_block: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:    constant max exit count for backedge: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:  Loop %loop: Unpredictable symbolic max backedge-taken count.
 ; CHECK-NEXT:    symbolic max exit count for loop: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:    symbolic max exit count for range_check_block: ***COULDNOTCOMPUTE***
@@ -210,8 +201,6 @@ define i32 @test_and_conditions(i32 %start, i32 %len) {
 ; CHECK-NEXT:    exit count for loop: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:    exit count for backedge: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:  Loop %loop: constant max backedge-taken count is -1
-; CHECK-NEXT:    constant max exit count for loop: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:    constant max exit count for backedge: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:  Loop %loop: Unpredictable symbolic max backedge-taken count.
 ; CHECK-NEXT:    symbolic max exit count for loop: ***COULDNOTCOMPUTE***
 ; CHECK-NEXT:    symbolic max exit count for backedge: ***COULDNOTCOMPUTE***
@@ -239,99 +228,3 @@ done:
 failed:
   ret i32 -3
 }
-
-define i32 @test_mixup_constant_symbolic(i32 %end, i32 %len) {
-; CHECK-LABEL: 'test_mixup_constant_symbolic'
-; CHECK-NEXT:  Classifying expressions for: @test_mixup_constant_symbolic
-; CHECK-NEXT:    %iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,1001) S: [0,1001) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
-; CHECK-NEXT:    %iv.next = add i32 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,1002) S: [1,1002) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
-; CHECK-NEXT:    %loop_cond = call i1 @cond()
-; CHECK-NEXT:    --> %loop_cond U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
-; CHECK-NEXT:  Determining loop execution counts for: @test_mixup_constant_symbolic
-; CHECK-NEXT:  Loop %loop: <multiple exits> Unpredictable backedge-taken count.
-; CHECK-NEXT:    exit count for loop: %end
-; CHECK-NEXT:    exit count for range_check_block: 1000
-; CHECK-NEXT:    exit count for backedge: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:  Loop %loop: constant max backedge-taken count is 1000
-; CHECK-NEXT:    constant max exit count for loop: -1
-; CHECK-NEXT:    constant max exit count for range_check_block: 1000
-; CHECK-NEXT:    constant max exit count for backedge: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:  Loop %loop: symbolic max backedge-taken count is (1000 umin %end)
-; CHECK-NEXT:    symbolic max exit count for loop: %end
-; CHECK-NEXT:    symbolic max exit count for range_check_block: 1000
-; CHECK-NEXT:    symbolic max exit count for backedge: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:  Loop %loop: Unpredictable predicated backedge-taken count.
-;
-entry:
-  br label %loop
-
-loop:
-  %iv = phi i32 [0, %entry], [%iv.next, %backedge]
-  %zero_check = icmp ne i32 %iv, %end
-  br i1 %zero_check, label %range_check_block, label %failed_1
-
-range_check_block:
-  %range_check = icmp ult i32 %iv, 1000
-  br i1 %range_check, label %backedge, label %failed_2
-
-backedge:
-  %iv.next = add i32 %iv, 1
-  %loop_cond = call i1 @cond()
-  br i1 %loop_cond, label %done, label %loop
-
-done:
-  ret i32 %iv
-
-failed_1:
-  ret i32 -1
-
-failed_2:
-  ret i32 -2
-}
-
-define i32 @test_mixup_constant_symbolic_merged(i32 %end, i32 %len) {
-; CHECK-LABEL: 'test_mixup_constant_symbolic_merged'
-; CHECK-NEXT:  Classifying expressions for: @test_mixup_constant_symbolic_merged
-; CHECK-NEXT:    %iv = phi i32 [ 0, %entry ], [ %iv.next, %backedge ]
-; CHECK-NEXT:    --> {0,+,1}<%loop> U: [0,1001) S: [0,1001) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
-; CHECK-NEXT:    %and = and i1 %zero_check, %range_check
-; CHECK-NEXT:    --> (%range_check umin %zero_check) U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
-; CHECK-NEXT:    %iv.next = add i32 %iv, 1
-; CHECK-NEXT:    --> {1,+,1}<%loop> U: [1,1002) S: [1,1002) Exits: <<Unknown>> LoopDispositions: { %loop: Computable }
-; CHECK-NEXT:    %loop_cond = call i1 @cond()
-; CHECK-NEXT:    --> %loop_cond U: full-set S: full-set Exits: <<Unknown>> LoopDispositions: { %loop: Variant }
-; CHECK-NEXT:  Determining loop execution counts for: @test_mixup_constant_symbolic_merged
-; CHECK-NEXT:  Loop %loop: <multiple exits> Unpredictable backedge-taken count.
-; CHECK-NEXT:    exit count for loop: (1000 umin %end)
-; CHECK-NEXT:    exit count for backedge: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:  Loop %loop: constant max backedge-taken count is 1000
-; CHECK-NEXT:    constant max exit count for loop: 1000
-; CHECK-NEXT:    constant max exit count for backedge: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:  Loop %loop: symbolic max backedge-taken count is (1000 umin %end)
-; CHECK-NEXT:    symbolic max exit count for loop: (1000 umin %end)
-; CHECK-NEXT:    symbolic max exit count for backedge: ***COULDNOTCOMPUTE***
-; CHECK-NEXT:  Loop %loop: Unpredictable predicated backedge-taken count.
-;
-entry:
-  br label %loop
-
-loop:
-  %iv = phi i32 [0, %entry], [%iv.next, %backedge]
-  %zero_check = icmp ne i32 %iv, %end
-  %range_check = icmp ult i32 %iv, 1000
-  %and = and i1 %zero_check, %range_check
-  br i1 %and, label %backedge, label %failed_1
-
-backedge:
-  %iv.next = add i32 %iv, 1
-  %loop_cond = call i1 @cond()
-  br i1 %loop_cond, label %done, label %loop
-
-done:
-  ret i32 %iv
-
-failed_1:
-  ret i32 -1
-}