1 ; Test shortening of NILL to NILF when the result is used as a shift amount. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 ; Test logical shift right. 6 define i32 @f1(i32 %a, i32 %sh) { 7 ; CHECK-LABEL: f1: 8 ; CHECK: nill %r3, 31 9 ; CHECK: srl %r2, 0(%r3) 10 %and = and i32 %sh, 31 11 %shift = lshr i32 %a, %and 12 ret i32 %shift 13 } 14 15 ; Test arithmetic shift right. 16 define i32 @f2(i32 %a, i32 %sh) { 17 ; CHECK-LABEL: f2: 18 ; CHECK: nill %r3, 31 19 ; CHECK: sra %r2, 0(%r3) 20 %and = and i32 %sh, 31 21 %shift = ashr i32 %a, %and 22 ret i32 %shift 23 } 24 25 ; Test shift left. 26 define i32 @f3(i32 %a, i32 %sh) { 27 ; CHECK-LABEL: f3: 28 ; CHECK: nill %r3, 31 29 ; CHECK: sll %r2, 0(%r3) 30 %and = and i32 %sh, 31 31 %shift = shl i32 %a, %and 32 ret i32 %shift 33 } 34 35 ; Test 64-bit logical shift right. 36 define i64 @f4(i64 %a, i64 %sh) { 37 ; CHECK-LABEL: f4: 38 ; CHECK: nill %r3, 31 39 ; CHECK: srlg %r2, %r2, 0(%r3) 40 %and = and i64 %sh, 31 41 %shift = lshr i64 %a, %and 42 ret i64 %shift 43 } 44 45 ; Test 64-bit arithmetic shift right. 46 define i64 @f5(i64 %a, i64 %sh) { 47 ; CHECK-LABEL: f5: 48 ; CHECK: nill %r3, 31 49 ; CHECK: srag %r2, %r2, 0(%r3) 50 %and = and i64 %sh, 31 51 %shift = ashr i64 %a, %and 52 ret i64 %shift 53 } 54 55 ; Test 64-bit shift left. 56 define i64 @f6(i64 %a, i64 %sh) { 57 ; CHECK-LABEL: f6: 58 ; CHECK: nill %r3, 31 59 ; CHECK: sllg %r2, %r2, 0(%r3) 60 %and = and i64 %sh, 31 61 %shift = shl i64 %a, %and 62 ret i64 %shift 63 } 64
