1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=newgvn -S %s | FileCheck %s 3 4; Test cases to make sure the blocks are properly marked as executable, if the 5; state of the branch condition changes. 6 7; Test case to make sure the case where a condition cannot be simplified is 8; handled properly. 9define i1 @test1() { 10; CHECK-LABEL: @test1( 11; CHECK-NEXT: entry: 12; CHECK-NEXT: [[CALL:%.*]] = tail call i1 @foo() 13; CHECK-NEXT: br i1 [[CALL]], label [[THEN:%.*]], label [[ELSE:%.*]] 14; CHECK: then: 15; CHECK-NEXT: ret i1 true 16; CHECK: else: 17; CHECK-NEXT: ret i1 false 18; 19entry: 20 %call = tail call i1 @foo() 21 br i1 %call, label %then, label %else 22 23then: 24 ret i1 true 25 26else: 27 ret i1 false 28} 29 30declare i1 @foo() 31 32; Make sure state changes are propagated across freeze to branches. 33define void @test2(i1 %c) { 34; CHECK-LABEL: @test2( 35; CHECK-NEXT: entry: 36; CHECK-NEXT: br label [[LOOP_HEADER:%.*]] 37; CHECK: loop.header: 38; CHECK-NEXT: [[P_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[LOOP_LATCH:%.*]] ] 39; CHECK-NEXT: [[P_1:%.*]] = phi i32 [ 1, [[ENTRY]] ], [ [[P_2:%.*]], [[LOOP_LATCH]] ] 40; CHECK-NEXT: br label [[LOOP_BB_1:%.*]] 41; CHECK: loop.bb.1: 42; CHECK-NEXT: [[INC]] = add nsw i32 [[P_0]], 1 43; CHECK-NEXT: [[C_1:%.*]] = icmp slt i32 [[P_0]], 0 44; CHECK-NEXT: [[C_1_FREEZE:%.*]] = freeze i1 [[C_1]] 45; CHECK-NEXT: br i1 [[C_1_FREEZE]], label [[LOOP_BB_2:%.*]], label [[LOOP_LATCH]] 46; CHECK: loop.bb.2: 47; CHECK-NEXT: br label [[LOOP_LATCH]] 48; CHECK: loop.latch: 49; CHECK-NEXT: [[P_2]] = phi i32 [ 0, [[LOOP_BB_2]] ], [ [[P_1]], [[LOOP_BB_1]] ] 50; CHECK-NEXT: [[C_2:%.*]] = icmp eq i32 [[P_2]], 123 51; CHECK-NEXT: br i1 [[C_2]], label [[EXIT:%.*]], label [[LOOP_HEADER]] 52; CHECK: exit: 53; CHECK-NEXT: ret void 54; 55entry: 56 br label %loop.header 57 58loop.header: 59 %p.0 = phi i32 [ 0, %entry ], [ %p.3, %loop.latch ] 60 %p.1 = phi i32 [ 1, %entry ], [ %p.2, %loop.latch ] 61 br label %loop.bb.1 62 63loop.bb.1: 64 %inc = add nsw i32 %p.0, 1 65 %c.1 = icmp slt i32 %p.0, 0 66 %c.1.freeze = freeze i1 %c.1 67 br i1 %c.1.freeze, label %loop.bb.2, label %loop.latch 68 69loop.bb.2: 70 br label %loop.latch 71 72loop.latch: 73 %p.2 = phi i32 [ 0, %loop.bb.2 ], [ %p.1, %loop.bb.1 ] 74 %p.3 = phi i32 [ %inc, %loop.bb.2 ], [ %inc, %loop.bb.1 ] 75 %c.2 = icmp eq i32 %p.2, 123 76 br i1 %c.2, label %exit, label %loop.header 77 78exit: 79 ret void 80} 81