1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt -S -passes=instcombine < %s | FileCheck %s 3target datalayout = "E-m:e-i64:64-n32:64" 4target triple = "powerpc64-unknown-linux-gnu" 5 6@d = global i32 15, align 4 7@b = global ptr @d, align 8 8@a = common global i32 0, align 4 9 10; Check that both InstCombine and InstSimplify can use computeKnownBits to 11; realize that: 12; ((2072 >> (L == 0)) >> 7) & 1 13; is always zero. 14define signext i32 @main() #1 { 15; CHECK-LABEL: @main( 16; CHECK-NEXT: entry: 17; CHECK-NEXT: [[TMP0:%.*]] = load ptr, ptr @b, align 8 18; CHECK-NEXT: [[TMP1:%.*]] = load i32, ptr [[TMP0]], align 4 19; CHECK-NEXT: ret i32 [[TMP1]] 20; 21entry: 22 %0 = load ptr, ptr @b, align 8 23 %1 = load i32, ptr @a, align 4 24 %lnot = icmp eq i32 %1, 0 25 %lnot.ext = zext i1 %lnot to i32 26 %shr.i = lshr i32 2072, %lnot.ext 27 %call.lobit = lshr i32 %shr.i, 7 28 %2 = and i32 %call.lobit, 1 29 %3 = load i32, ptr %0, align 4 30 %or = or i32 %2, %3 31 store i32 %or, ptr %0, align 4 32 %4 = load i32, ptr @a, align 4 33 %lnot.1 = icmp eq i32 %4, 0 34 %lnot.ext.1 = zext i1 %lnot.1 to i32 35 %shr.i.1 = lshr i32 2072, %lnot.ext.1 36 %call.lobit.1 = lshr i32 %shr.i.1, 7 37 %5 = and i32 %call.lobit.1, 1 38 %or.1 = or i32 %5, %or 39 store i32 %or.1, ptr %0, align 4 40 ret i32 %or.1 41 42} 43 44attributes #0 = { nounwind readnone } 45attributes #1 = { nounwind } 46 47