1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; Test a bunch of cases where the cfg simplification code should 3; be able to fold PHI nodes into computation in common cases. Folding the PHI 4; nodes away allows the branches to be eliminated, performing a simple form of 5; 'if conversion'. 6 7; RUN: opt < %s -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S | FileCheck %s 8 9declare void @use(i1) 10 11declare void @use.upgrd.1(i32) 12 13 14define void @test(i1 %c, i32 %V, i32 %V2) { 15; <label>:0 16; CHECK-LABEL: @test( 17; CHECK-NEXT: F: 18; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[C:%.*]], i1 false, i1 true 19; CHECK-NEXT: [[SPEC_SELECT1:%.*]] = select i1 [[C]], i32 0, i32 [[V:%.*]] 20; CHECK-NEXT: call void @use(i1 [[SPEC_SELECT]]) 21; CHECK-NEXT: call void @use.upgrd.1(i32 [[SPEC_SELECT1]]) 22; CHECK-NEXT: ret void 23; 24 br i1 %c, label %T, label %F 25T: ; preds = %0 26 br label %F 27F: ; preds = %T, %0 28 %B1 = phi i1 [ true, %0 ], [ false, %T ] ; <i1> [#uses=1] 29 %I6 = phi i32 [ %V, %0 ], [ 0, %T ] ; <i32> [#uses=1] 30 call void @use( i1 %B1 ) 31 call void @use.upgrd.1( i32 %I6 ) 32 ret void 33} 34 35