1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=simplifycfg -simplifycfg-require-and-preserve-domtree=1 -S < %s | FileCheck %s 3 4declare { i32, i1 } @llvm.uadd.with.overflow.i32(i32, i32) #1 5 6define i32 @f(i32 %a, i32 %b) #0 { 7; CHECK-LABEL: @f( 8; CHECK-NEXT: entry: 9; CHECK-NEXT: [[UADD:%.*]] = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 [[A:%.*]], i32 [[B:%.*]]) 10; CHECK-NEXT: [[CMP:%.*]] = extractvalue { i32, i1 } [[UADD]], 1 11; CHECK-NEXT: [[TMP0:%.*]] = extractvalue { i32, i1 } [[UADD]], 0 12; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[CMP]], i32 0, i32 [[TMP0]] 13; CHECK-NEXT: ret i32 [[SPEC_SELECT]] 14; 15entry: 16 %uadd = tail call { i32, i1 } @llvm.uadd.with.overflow.i32(i32 %a, i32 %b) 17 %cmp = extractvalue { i32, i1 } %uadd, 1 18 br i1 %cmp, label %return, label %if.end 19 20if.end: ; preds = %entry 21 %0 = extractvalue { i32, i1 } %uadd, 0 22 br label %return 23 24return: ; preds = %entry, %if.end 25 %retval.0 = phi i32 [ %0, %if.end ], [ 0, %entry ] 26 ret i32 %retval.0 27} 28 29define i1 @PR32078(<4 x i32> %a, <4 x i32> %b) { 30; CHECK-LABEL: @PR32078( 31; CHECK-NEXT: entry: 32; CHECK-NEXT: [[CMP:%.*]] = icmp eq <4 x i32> [[A:%.*]], [[B:%.*]] 33; CHECK-NEXT: [[CMP0:%.*]] = extractelement <4 x i1> [[CMP]], i32 0 34; CHECK-NEXT: [[CMP1:%.*]] = extractelement <4 x i1> [[CMP]], i32 1 35; CHECK-NEXT: [[CMP2:%.*]] = extractelement <4 x i1> [[CMP]], i32 2 36; CHECK-NEXT: [[CMP3:%.*]] = extractelement <4 x i1> [[CMP]], i32 3 37; CHECK-NEXT: [[CMP0_NOT:%.*]] = xor i1 [[CMP0]], true 38; CHECK-NEXT: [[CMP1_NOT:%.*]] = xor i1 [[CMP1]], true 39; CHECK-NEXT: [[BRMERGE:%.*]] = select i1 [[CMP0_NOT]], i1 true, i1 [[CMP1_NOT]] 40; CHECK-NEXT: br i1 [[BRMERGE]], label [[EXIT:%.*]], label [[CMP1_TRUE:%.*]] 41; CHECK: cmp1_true: 42; CHECK-NEXT: [[SPEC_SELECT:%.*]] = select i1 [[CMP2]], i1 [[CMP3]], i1 false 43; CHECK-NEXT: br label [[EXIT]] 44; CHECK: exit: 45; CHECK-NEXT: [[R:%.*]] = phi i1 [ false, [[ENTRY:%.*]] ], [ [[SPEC_SELECT]], [[CMP1_TRUE]] ] 46; CHECK-NEXT: ret i1 [[R]] 47; 48entry: 49 %cmp = icmp eq <4 x i32> %a, %b 50 %cmp0 = extractelement <4 x i1> %cmp, i32 0 51 %cmp1 = extractelement <4 x i1> %cmp, i32 1 52 %cmp2 = extractelement <4 x i1> %cmp, i32 2 53 %cmp3 = extractelement <4 x i1> %cmp, i32 3 54 br i1 %cmp0, label %cmp0_true, label %exit 55 56cmp0_true: 57 br i1 %cmp1, label %cmp1_true, label %exit 58 59cmp1_true: 60 br i1 %cmp2, label %cmp2_true, label %exit 61 62cmp2_true: 63 br label %exit 64 65exit: 66 %r = phi i1 [ false, %cmp0_true ], [ false, %cmp1_true ], [ false, %entry ], [ %cmp3, %cmp2_true ] 67 ret i1 %r 68} 69