1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2 2; RUN: opt < %s -passes=instcombine -S | FileCheck %s 3 4define i1 @SwitchTest(i32 %x, i32 %y) { 5; CHECK-LABEL: define i1 @SwitchTest 6; CHECK-SAME: (i32 [[X:%.*]], i32 [[Y:%.*]]) { 7; CHECK-NEXT: entry: 8; CHECK-NEXT: switch i32 [[X]], label [[BB1:%.*]] [ 9; CHECK-NEXT: i32 0, label [[BB2:%.*]] 10; CHECK-NEXT: i32 1, label [[BB3:%.*]] 11; CHECK-NEXT: ] 12; CHECK: bb1: 13; CHECK-NEXT: [[TMP0:%.*]] = icmp ugt i32 [[Y]], 1 14; CHECK-NEXT: br label [[BB2]] 15; CHECK: bb2: 16; CHECK-NEXT: [[PHI1:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[TMP0]], [[BB1]] ] 17; CHECK-NEXT: br label [[BB3]] 18; CHECK: bb3: 19; CHECK-NEXT: [[PHI2:%.*]] = phi i1 [ [[PHI1]], [[BB2]] ], [ false, [[ENTRY]] ] 20; CHECK-NEXT: ret i1 [[PHI2]] 21; 22entry: 23 switch i32 %x, label %bb1 [ 24 i32 0, label %bb2 25 i32 1, label %bb3 26 ] 27 28bb1: 29 br label %bb2 30 31bb2: 32 %phi1 = phi i32 [ 1, %entry ], [ %y, %bb1 ] 33 br label %bb3 34 35bb3: 36 %phi2 = phi i32 [ %phi1, %bb2 ], [ 0, %entry ] 37 %cmp = icmp ugt i32 %phi2, 1 38 ret i1 %cmp 39} 40 41; Test case derived from: 42; llvm-test-suite/MultiSource/Benchmarks/MiBench/consumer-typeset/z10.c 43define i1 @BranchTest(i1 %c, i1 %c1, i1 %c2, i1 %c3, i1 %c4) { 44; CHECK-LABEL: define i1 @BranchTest 45; CHECK-SAME: (i1 [[C:%.*]], i1 [[C1:%.*]], i1 [[C2:%.*]], i1 [[C3:%.*]], i1 [[C4:%.*]]) { 46; CHECK-NEXT: entry: 47; CHECK-NEXT: br i1 [[C]], label [[SW_EPILOG:%.*]], label [[COND_FALSE:%.*]] 48; CHECK: cond.false: 49; CHECK-NEXT: br i1 [[C1]], label [[SW_EPILOG]], label [[COND_FALSE2:%.*]] 50; CHECK: cond.false2: 51; CHECK-NEXT: br i1 [[C2]], label [[SW_EPILOG]], label [[COND_FALSE3:%.*]] 52; CHECK: cond.false3: 53; CHECK-NEXT: br i1 [[C3]], label [[SW_BB:%.*]], label [[COND_END:%.*]] 54; CHECK: cond.end: 55; CHECK-NEXT: br label [[SW_BB]] 56; CHECK: sw.bb: 57; CHECK-NEXT: br label [[SW_EPILOG]] 58; CHECK: sw.epilog: 59; CHECK-NEXT: ret i1 [[C]] 60; 61entry: 62 br i1 %c, label %sw.epilog, label %cond.false 63 64cond.false: 65 br i1 %c1, label %sw.epilog, label %cond.false2 66 67cond.false2: 68 br i1 %c2, label %sw.epilog, label %cond.false3 69 70cond.false3: 71 br i1 %c3, label %sw.bb, label %cond.end 72 73cond.end: 74 %cond = select i1 %c4, i32 127, i32 126 75 br label %sw.bb 76 77sw.bb: 78 %cond2 = phi i32 [ %cond, %cond.end ], [ 128, %cond.false3 ] 79 br label %sw.epilog 80 81sw.epilog: 82 %cond3 = phi i32 [ %cond2, %sw.bb ], [ 134, %cond.false2 ], [ 2, %cond.false ], [ 1, %entry ] 83 %cmp = icmp ult i32 %cond3, 2 84 ret i1 %cmp 85} 86