1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -passes=aggressive-instcombine -S < %s | FileCheck %s 3 4@ctz1.table = internal constant [32 x i8] c"\00\01\1C\02\1D\0E\18\03\1E\16\14\0F\19\11\04\08\1F\1B\0D\17\15\13\10\07\1A\0C\12\06\0B\05\0A\09", align 1 5 6define i32 @ctz1(i32 %x) { 7; CHECK-LABEL: @ctz1( 8; CHECK-NEXT: entry: 9; CHECK-NEXT: [[TMP0:%.*]] = call i32 @llvm.cttz.i32(i32 [[X:%.*]], i1 true) 10; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i32 [[X]], 0 11; CHECK-NEXT: [[TMP2:%.*]] = select i1 [[TMP1]], i32 0, i32 [[TMP0]] 12; CHECK-NEXT: [[TMP3:%.*]] = trunc i32 [[TMP2]] to i8 13; CHECK-NEXT: [[CONV:%.*]] = zext i8 [[TMP3]] to i32 14; CHECK-NEXT: ret i32 [[CONV]] 15; 16entry: 17 %sub = sub i32 0, %x 18 %and = and i32 %sub, %x 19 %mul = mul i32 %and, 125613361 20 %shr = lshr i32 %mul, 27 21 %idxprom = zext i32 %shr to i64 22 %arrayidx = getelementptr inbounds [32 x i8], ptr @ctz1.table, i64 0, i64 %idxprom 23 %0 = load i8, ptr %arrayidx, align 1 24 %conv = zext i8 %0 to i32 25 ret i32 %conv 26} 27