| ; NOTE: Assertions have been autogenerated by utils/update_test_checks.py |
| ; RUN: opt < %s -passes=instcombine -S | FileCheck %s |
| |
| define i55 @test6(i55 %A) { |
| ; CHECK-LABEL: @test6( |
| ; CHECK-NEXT: [[C:%.*]] = mul i55 [[A:%.*]], 6 |
| ; CHECK-NEXT: ret i55 [[C]] |
| ; |
| %B = shl i55 %A, 1 |
| %C = mul i55 %B, 3 |
| ret i55 %C |
| } |
| |
| ; (X * C2) << C1 --> X * (C2 << C1) |
| |
| define i55 @test6a(i55 %A) { |
| ; CHECK-LABEL: @test6a( |
| ; CHECK-NEXT: [[C:%.*]] = mul i55 [[A:%.*]], 6 |
| ; CHECK-NEXT: ret i55 [[C]] |
| ; |
| %B = mul i55 %A, 3 |
| %C = shl i55 %B, 1 |
| ret i55 %C |
| } |
| |
| declare void @use(i55 %0) |
| |
| define i55 @test6a_negative_oneuse(i55 %A) { |
| ; CHECK-LABEL: @test6a_negative_oneuse( |
| ; CHECK-NEXT: [[B:%.*]] = mul i55 [[A:%.*]], 3 |
| ; CHECK-NEXT: [[C:%.*]] = mul i55 [[A]], 6 |
| ; CHECK-NEXT: call void @use(i55 [[B]]) |
| ; CHECK-NEXT: ret i55 [[C]] |
| ; |
| %B = mul i55 %A, 3 |
| %C = shl i55 %B, 1 |
| call void @use(i55 %B) |
| ret i55 %C |
| } |
| |
| ; (X * C2) << C1 --> X * (C2 << C1) |
| |
| define <2 x i55> @test6a_vec(<2 x i55> %A) { |
| ; CHECK-LABEL: @test6a_vec( |
| ; CHECK-NEXT: [[C:%.*]] = mul <2 x i55> [[A:%.*]], <i55 6, i55 48> |
| ; CHECK-NEXT: ret <2 x i55> [[C]] |
| ; |
| %B = mul <2 x i55> %A, <i55 3, i55 12> |
| %C = shl <2 x i55> %B, <i55 1, i55 2> |
| ret <2 x i55> %C |
| } |
| |
| define i29 @test7(i8 %X) { |
| ; CHECK-LABEL: @test7( |
| ; CHECK-NEXT: ret i29 -1 |
| ; |
| %A = zext i8 %X to i29 |
| %B = ashr i29 -1, %A |
| ret i29 %B |
| } |
| |
| define i7 @test8(i7 %A) { |
| ; CHECK-LABEL: @test8( |
| ; CHECK-NEXT: ret i7 0 |
| ; |
| %B = shl i7 %A, 4 |
| %C = shl i7 %B, 3 |
| ret i7 %C |
| } |
| |
| define i17 @test9(i17 %A) { |
| ; CHECK-LABEL: @test9( |
| ; CHECK-NEXT: [[B:%.*]] = and i17 [[A:%.*]], 1 |
| ; CHECK-NEXT: ret i17 [[B]] |
| ; |
| %B = shl i17 %A, 16 |
| %C = lshr i17 %B, 16 |
| ret i17 %C |
| } |
| |
| ; shl (lshr X, C), C --> and X, C' |
| |
| define i19 @test10(i19 %X) { |
| ; CHECK-LABEL: @test10( |
| ; CHECK-NEXT: [[SH1:%.*]] = and i19 [[X:%.*]], -262144 |
| ; CHECK-NEXT: ret i19 [[SH1]] |
| ; |
| %sh1 = lshr i19 %X, 18 |
| %sh2 = shl i19 %sh1, 18 |
| ret i19 %sh2 |
| } |
| |
| ; Two right shifts in the same direction: |
| ; lshr (lshr X, C1), C2 --> lshr X, C1 + C2 |
| |
| define <2 x i19> @lshr_lshr_splat_vec(<2 x i19> %X) { |
| ; CHECK-LABEL: @lshr_lshr_splat_vec( |
| ; CHECK-NEXT: [[SH1:%.*]] = lshr <2 x i19> [[X:%.*]], <i19 5, i19 5> |
| ; CHECK-NEXT: ret <2 x i19> [[SH1]] |
| ; |
| %sh1 = lshr <2 x i19> %X, <i19 3, i19 3> |
| %sh2 = lshr <2 x i19> %sh1, <i19 2, i19 2> |
| ret <2 x i19> %sh2 |
| } |
| |
| define i9 @multiuse_lshr_lshr(i9 %x) { |
| ; CHECK-LABEL: @multiuse_lshr_lshr( |
| ; CHECK-NEXT: [[SH1:%.*]] = lshr i9 [[X:%.*]], 2 |
| ; CHECK-NEXT: [[SH2:%.*]] = lshr i9 [[X]], 5 |
| ; CHECK-NEXT: [[MUL:%.*]] = mul i9 [[SH1]], [[SH2]] |
| ; CHECK-NEXT: ret i9 [[MUL]] |
| ; |
| %sh1 = lshr i9 %x, 2 |
| %sh2 = lshr i9 %sh1, 3 |
| %mul = mul i9 %sh1, %sh2 |
| ret i9 %mul |
| } |
| |
| define <2 x i9> @multiuse_lshr_lshr_splat(<2 x i9> %x) { |
| ; CHECK-LABEL: @multiuse_lshr_lshr_splat( |
| ; CHECK-NEXT: [[SH1:%.*]] = lshr <2 x i9> [[X:%.*]], <i9 2, i9 2> |
| ; CHECK-NEXT: [[SH2:%.*]] = lshr <2 x i9> [[X]], <i9 5, i9 5> |
| ; CHECK-NEXT: [[MUL:%.*]] = mul <2 x i9> [[SH1]], [[SH2]] |
| ; CHECK-NEXT: ret <2 x i9> [[MUL]] |
| ; |
| %sh1 = lshr <2 x i9> %x, <i9 2, i9 2> |
| %sh2 = lshr <2 x i9> %sh1, <i9 3, i9 3> |
| %mul = mul <2 x i9> %sh1, %sh2 |
| ret <2 x i9> %mul |
| } |
| |
| ; Two left shifts in the same direction: |
| ; shl (shl X, C1), C2 --> shl X, C1 + C2 |
| |
| define <2 x i19> @shl_shl_splat_vec(<2 x i19> %X) { |
| ; CHECK-LABEL: @shl_shl_splat_vec( |
| ; CHECK-NEXT: [[SH1:%.*]] = shl <2 x i19> [[X:%.*]], <i19 5, i19 5> |
| ; CHECK-NEXT: ret <2 x i19> [[SH1]] |
| ; |
| %sh1 = shl <2 x i19> %X, <i19 3, i19 3> |
| %sh2 = shl <2 x i19> %sh1, <i19 2, i19 2> |
| ret <2 x i19> %sh2 |
| } |
| |
| define i42 @multiuse_shl_shl(i42 %x) { |
| ; CHECK-LABEL: @multiuse_shl_shl( |
| ; CHECK-NEXT: [[SH1:%.*]] = shl i42 [[X:%.*]], 8 |
| ; CHECK-NEXT: [[SH2:%.*]] = shl i42 [[X]], 17 |
| ; CHECK-NEXT: [[MUL:%.*]] = mul i42 [[SH1]], [[SH2]] |
| ; CHECK-NEXT: ret i42 [[MUL]] |
| ; |
| %sh1 = shl i42 %x, 8 |
| %sh2 = shl i42 %sh1, 9 |
| %mul = mul i42 %sh1, %sh2 |
| ret i42 %mul |
| } |
| |
| define <2 x i42> @multiuse_shl_shl_splat(<2 x i42> %x) { |
| ; CHECK-LABEL: @multiuse_shl_shl_splat( |
| ; CHECK-NEXT: [[SH1:%.*]] = shl <2 x i42> [[X:%.*]], <i42 8, i42 8> |
| ; CHECK-NEXT: [[SH2:%.*]] = shl <2 x i42> [[X]], <i42 17, i42 17> |
| ; CHECK-NEXT: [[MUL:%.*]] = mul <2 x i42> [[SH1]], [[SH2]] |
| ; CHECK-NEXT: ret <2 x i42> [[MUL]] |
| ; |
| %sh1 = shl <2 x i42> %x, <i42 8, i42 8> |
| %sh2 = shl <2 x i42> %sh1, <i42 9, i42 9> |
| %mul = mul <2 x i42> %sh1, %sh2 |
| ret <2 x i42> %mul |
| } |
| |
| ; Equal shift amounts in opposite directions become bitwise 'and': |
| ; lshr (shl X, C), C --> and X, C' |
| |
| define <2 x i19> @eq_shl_lshr_splat_vec(<2 x i19> %X) { |
| ; CHECK-LABEL: @eq_shl_lshr_splat_vec( |
| ; CHECK-NEXT: [[SH1:%.*]] = and <2 x i19> [[X:%.*]], <i19 65535, i19 65535> |
| ; CHECK-NEXT: ret <2 x i19> [[SH1]] |
| ; |
| %sh1 = shl <2 x i19> %X, <i19 3, i19 3> |
| %sh2 = lshr <2 x i19> %sh1, <i19 3, i19 3> |
| ret <2 x i19> %sh2 |
| } |
| |
| ; Equal shift amounts in opposite directions become bitwise 'and': |
| ; shl (lshr X, C), C --> and X, C' |
| |
| define <2 x i19> @eq_lshr_shl_splat_vec(<2 x i19> %X) { |
| ; CHECK-LABEL: @eq_lshr_shl_splat_vec( |
| ; CHECK-NEXT: [[SH1:%.*]] = and <2 x i19> [[X:%.*]], <i19 -8, i19 -8> |
| ; CHECK-NEXT: ret <2 x i19> [[SH1]] |
| ; |
| %sh1 = lshr <2 x i19> %X, <i19 3, i19 3> |
| %sh2 = shl <2 x i19> %sh1, <i19 3, i19 3> |
| ret <2 x i19> %sh2 |
| } |
| |
| ; In general, we would need an 'and' for this transform, but the masked-off bits are known zero. |
| ; shl (lshr X, C1), C2 --> lshr X, C1 - C2 |
| |
| define <2 x i7> @lshr_shl_splat_vec(<2 x i7> %X) { |
| ; CHECK-LABEL: @lshr_shl_splat_vec( |
| ; CHECK-NEXT: [[DOTNEG:%.*]] = mul <2 x i7> [[X:%.*]], <i7 60, i7 60> |
| ; CHECK-NEXT: [[SH2:%.*]] = and <2 x i7> [[DOTNEG]], <i7 60, i7 60> |
| ; CHECK-NEXT: ret <2 x i7> [[SH2]] |
| ; |
| %mul = mul <2 x i7> %X, <i7 -8, i7 -8> |
| %sh1 = lshr exact <2 x i7> %mul, <i7 3, i7 3> |
| %sh2 = shl nuw nsw <2 x i7> %sh1, <i7 2, i7 2> |
| ret <2 x i7> %sh2 |
| } |
| |
| ; In general, we would need an 'and' for this transform, but the masked-off bits are known zero. |
| ; lshr (shl X, C1), C2 --> shl X, C1 - C2 |
| |
| define <2 x i7> @shl_lshr_splat_vec(<2 x i7> %X) { |
| ; CHECK-LABEL: @shl_lshr_splat_vec( |
| ; CHECK-NEXT: [[DIV:%.*]] = udiv <2 x i7> [[X:%.*]], <i7 9, i7 9> |
| ; CHECK-NEXT: [[SH1:%.*]] = shl nuw nsw <2 x i7> [[DIV]], <i7 1, i7 1> |
| ; CHECK-NEXT: ret <2 x i7> [[SH1]] |
| ; |
| %div = udiv <2 x i7> %X, <i7 9, i7 9> |
| %sh1 = shl nuw <2 x i7> %div, <i7 3, i7 3> |
| %sh2 = lshr exact <2 x i7> %sh1, <i7 2, i7 2> |
| ret <2 x i7> %sh2 |
| } |
| |
| define i23 @test11(i23 %x) { |
| ; CHECK-LABEL: @test11( |
| ; CHECK-NEXT: [[TMP1:%.*]] = mul i23 [[X:%.*]], 6 |
| ; CHECK-NEXT: [[C:%.*]] = and i23 [[TMP1]], -4096 |
| ; CHECK-NEXT: ret i23 [[C]] |
| ; |
| %a = mul i23 %x, 3 |
| %b = lshr i23 %a, 11 |
| %c = shl i23 %b, 12 |
| ret i23 %c |
| } |
| |
| ; shl (ashr X, C), C --> and X, C' |
| |
| define i47 @test12(i47 %X) { |
| ; CHECK-LABEL: @test12( |
| ; CHECK-NEXT: [[SH2:%.*]] = and i47 [[X:%.*]], -256 |
| ; CHECK-NEXT: ret i47 [[SH2]] |
| ; |
| %sh1 = ashr i47 %X, 8 |
| %sh2 = shl i47 %sh1, 8 |
| ret i47 %sh2 |
| } |
| |
| define <2 x i47> @test12_splat_vec(<2 x i47> %X) { |
| ; CHECK-LABEL: @test12_splat_vec( |
| ; CHECK-NEXT: [[SH2:%.*]] = and <2 x i47> [[X:%.*]], <i47 -256, i47 -256> |
| ; CHECK-NEXT: ret <2 x i47> [[SH2]] |
| ; |
| %sh1 = ashr <2 x i47> %X, <i47 8, i47 8> |
| %sh2 = shl <2 x i47> %sh1, <i47 8, i47 8> |
| ret <2 x i47> %sh2 |
| } |
| |
| define i18 @test13(i18 %x) { |
| ; CHECK-LABEL: @test13( |
| ; CHECK-NEXT: [[TMP1:%.*]] = mul i18 [[X:%.*]], 6 |
| ; CHECK-NEXT: [[C:%.*]] = and i18 [[TMP1]], -512 |
| ; CHECK-NEXT: ret i18 [[C]] |
| ; |
| %a = mul i18 %x, 3 |
| %b = ashr i18 %a, 8 |
| %c = shl i18 %b, 9 |
| ret i18 %c |
| } |
| |
| define i35 @test14(i35 %A) { |
| ; CHECK-LABEL: @test14( |
| ; CHECK-NEXT: [[B:%.*]] = and i35 [[A:%.*]], -19760 |
| ; CHECK-NEXT: [[C:%.*]] = or i35 [[B]], 19744 |
| ; CHECK-NEXT: ret i35 [[C]] |
| ; |
| %B = lshr i35 %A, 4 |
| %C = or i35 %B, 1234 |
| %D = shl i35 %C, 4 |
| ret i35 %D |
| } |
| |
| define i79 @test14a(i79 %A) { |
| ; CHECK-LABEL: @test14a( |
| ; CHECK-NEXT: [[C:%.*]] = and i79 [[A:%.*]], 77 |
| ; CHECK-NEXT: ret i79 [[C]] |
| ; |
| %B = shl i79 %A, 4 |
| %C = and i79 %B, 1234 |
| %D = lshr i79 %C, 4 |
| ret i79 %D |
| } |
| |
| define i45 @test15(i1 %C) { |
| ; CHECK-LABEL: @test15( |
| ; CHECK-NEXT: [[A:%.*]] = select i1 [[C:%.*]], i45 12, i45 4 |
| ; CHECK-NEXT: ret i45 [[A]] |
| ; |
| %A = select i1 %C, i45 3, i45 1 |
| %V = shl i45 %A, 2 |
| ret i45 %V |
| } |
| |
| define i53 @test15a(i1 %X) { |
| ; CHECK-LABEL: @test15a( |
| ; CHECK-NEXT: [[V:%.*]] = select i1 [[X:%.*]], i53 512, i53 128 |
| ; CHECK-NEXT: ret i53 [[V]] |
| ; |
| %A = select i1 %X, i8 3, i8 1 |
| %B = zext i8 %A to i53 |
| %V = shl i53 64, %B |
| ret i53 %V |
| } |
| |
| define i1 @test16(i84 %X) { |
| ; CHECK-LABEL: @test16( |
| ; CHECK-NEXT: [[TMP1:%.*]] = and i84 [[X:%.*]], 16 |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ne i84 [[TMP1]], 0 |
| ; CHECK-NEXT: ret i1 [[CMP]] |
| ; |
| %shr = ashr i84 %X, 4 |
| %and = and i84 %shr, 1 |
| %cmp = icmp ne i84 %and, 0 |
| ret i1 %cmp |
| } |
| |
| define <2 x i1> @test16vec(<2 x i84> %X) { |
| ; CHECK-LABEL: @test16vec( |
| ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i84> [[X:%.*]], <i84 16, i84 16> |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i84> [[TMP1]], zeroinitializer |
| ; CHECK-NEXT: ret <2 x i1> [[CMP]] |
| ; |
| %shr = ashr <2 x i84> %X, <i84 4, i84 4> |
| %and = and <2 x i84> %shr, <i84 1, i84 1> |
| %cmp = icmp ne <2 x i84> %and, zeroinitializer |
| ret <2 x i1> %cmp |
| } |
| |
| define <2 x i1> @test16vec_nonuniform(<2 x i84> %X) { |
| ; CHECK-LABEL: @test16vec_nonuniform( |
| ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i84> [[X:%.*]], <i84 16, i84 4> |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i84> [[TMP1]], zeroinitializer |
| ; CHECK-NEXT: ret <2 x i1> [[CMP]] |
| ; |
| %shr = ashr <2 x i84> %X, <i84 4, i84 2> |
| %and = and <2 x i84> %shr, <i84 1, i84 1> |
| %cmp = icmp ne <2 x i84> %and, zeroinitializer |
| ret <2 x i1> %cmp |
| } |
| |
| define <2 x i1> @test16vec_undef(<2 x i84> %X) { |
| ; CHECK-LABEL: @test16vec_undef( |
| ; CHECK-NEXT: [[TMP1:%.*]] = and <2 x i84> [[X:%.*]], <i84 16, i84 poison> |
| ; CHECK-NEXT: [[CMP:%.*]] = icmp ne <2 x i84> [[TMP1]], zeroinitializer |
| ; CHECK-NEXT: ret <2 x i1> [[CMP]] |
| ; |
| %shr = ashr <2 x i84> %X, <i84 4, i84 undef> |
| %and = and <2 x i84> %shr, <i84 1, i84 1> |
| %cmp = icmp ne <2 x i84> %and, zeroinitializer |
| ret <2 x i1> %cmp |
| } |
| |
| define i1 @test17(i106 %A) { |
| ; CHECK-LABEL: @test17( |
| ; CHECK-NEXT: [[B_MASK:%.*]] = and i106 [[A:%.*]], -8 |
| ; CHECK-NEXT: [[C:%.*]] = icmp eq i106 [[B_MASK]], 9872 |
| ; CHECK-NEXT: ret i1 [[C]] |
| ; |
| %B = lshr i106 %A, 3 |
| %C = icmp eq i106 %B, 1234 |
| ret i1 %C |
| } |
| |
| define <2 x i1> @test17vec(<2 x i106> %A) { |
| ; CHECK-LABEL: @test17vec( |
| ; CHECK-NEXT: [[B_MASK:%.*]] = and <2 x i106> [[A:%.*]], <i106 -8, i106 -8> |
| ; CHECK-NEXT: [[C:%.*]] = icmp eq <2 x i106> [[B_MASK]], <i106 9872, i106 9872> |
| ; CHECK-NEXT: ret <2 x i1> [[C]] |
| ; |
| %B = lshr <2 x i106> %A, <i106 3, i106 3> |
| %C = icmp eq <2 x i106> %B, <i106 1234, i106 1234> |
| ret <2 x i1> %C |
| } |
| |
| define i1 @test18(i11 %A) { |
| ; CHECK-LABEL: @test18( |
| ; CHECK-NEXT: ret i1 false |
| ; |
| %B = lshr i11 %A, 10 |
| %C = icmp eq i11 %B, 123 |
| ret i1 %C |
| } |
| |
| define i1 @test19(i37 %A) { |
| ; CHECK-LABEL: @test19( |
| ; CHECK-NEXT: [[C:%.*]] = icmp ult i37 [[A:%.*]], 4 |
| ; CHECK-NEXT: ret i1 [[C]] |
| ; |
| %B = ashr i37 %A, 2 |
| %C = icmp eq i37 %B, 0 |
| ret i1 %C |
| } |
| |
| define <2 x i1> @test19vec(<2 x i37> %A) { |
| ; CHECK-LABEL: @test19vec( |
| ; CHECK-NEXT: [[C:%.*]] = icmp ult <2 x i37> [[A:%.*]], <i37 4, i37 4> |
| ; CHECK-NEXT: ret <2 x i1> [[C]] |
| ; |
| %B = ashr <2 x i37> %A, <i37 2, i37 2> |
| %C = icmp eq <2 x i37> %B, zeroinitializer |
| ret <2 x i1> %C |
| } |
| |
| define i1 @test19a(i39 %A) { |
| ; CHECK-LABEL: @test19a( |
| ; CHECK-NEXT: [[C:%.*]] = icmp ugt i39 [[A:%.*]], -5 |
| ; CHECK-NEXT: ret i1 [[C]] |
| ; |
| %B = ashr i39 %A, 2 |
| %C = icmp eq i39 %B, -1 |
| ret i1 %C |
| } |
| |
| define <2 x i1> @test19a_vec(<2 x i39> %A) { |
| ; CHECK-LABEL: @test19a_vec( |
| ; CHECK-NEXT: [[C:%.*]] = icmp ugt <2 x i39> [[A:%.*]], <i39 -5, i39 -5> |
| ; CHECK-NEXT: ret <2 x i1> [[C]] |
| ; |
| %B = ashr <2 x i39> %A, <i39 2, i39 2> |
| %C = icmp eq <2 x i39> %B, <i39 -1, i39 -1> |
| ret <2 x i1> %C |
| } |
| |
| define i1 @test20(i13 %A) { |
| ; CHECK-LABEL: @test20( |
| ; CHECK-NEXT: ret i1 false |
| ; |
| %B = ashr i13 %A, 12 |
| %C = icmp eq i13 %B, 123 |
| ret i1 %C |
| } |
| |
| define i1 @test21(i12 %A) { |
| ; CHECK-LABEL: @test21( |
| ; CHECK-NEXT: [[B_MASK:%.*]] = and i12 [[A:%.*]], 63 |
| ; CHECK-NEXT: [[C:%.*]] = icmp eq i12 [[B_MASK]], 62 |
| ; CHECK-NEXT: ret i1 [[C]] |
| ; |
| %B = shl i12 %A, 6 |
| %C = icmp eq i12 %B, -128 |
| ret i1 %C |
| } |
| |
| define i1 @test22(i14 %A) { |
| ; CHECK-LABEL: @test22( |
| ; CHECK-NEXT: [[B_MASK:%.*]] = and i14 [[A:%.*]], 127 |
| ; CHECK-NEXT: [[C:%.*]] = icmp eq i14 [[B_MASK]], 0 |
| ; CHECK-NEXT: ret i1 [[C]] |
| ; |
| %B = shl i14 %A, 7 |
| %C = icmp eq i14 %B, 0 |
| ret i1 %C |
| } |
| |
| define i11 @test23(i44 %A) { |
| ; CHECK-LABEL: @test23( |
| ; CHECK-NEXT: [[D:%.*]] = trunc i44 [[A:%.*]] to i11 |
| ; CHECK-NEXT: ret i11 [[D]] |
| ; |
| %B = shl i44 %A, 33 |
| %C = ashr i44 %B, 33 |
| %D = trunc i44 %C to i11 |
| ret i11 %D |
| } |
| |
| ; Fold lshr (shl X, C), C -> and X, C' regardless of the number of uses of the shl. |
| |
| define i44 @shl_lshr_eq_amt_multi_use(i44 %A) { |
| ; CHECK-LABEL: @shl_lshr_eq_amt_multi_use( |
| ; CHECK-NEXT: [[B:%.*]] = shl i44 [[A:%.*]], 33 |
| ; CHECK-NEXT: [[C:%.*]] = and i44 [[A]], 2047 |
| ; CHECK-NEXT: [[D:%.*]] = or i44 [[B]], [[C]] |
| ; CHECK-NEXT: ret i44 [[D]] |
| ; |
| %B = shl i44 %A, 33 |
| %C = lshr i44 %B, 33 |
| %D = add i44 %B, %C |
| ret i44 %D |
| } |
| |
| ; Fold vector lshr (shl X, C), C -> and X, C' regardless of the number of uses of the shl. |
| |
| define <2 x i44> @shl_lshr_eq_amt_multi_use_splat_vec(<2 x i44> %A) { |
| ; CHECK-LABEL: @shl_lshr_eq_amt_multi_use_splat_vec( |
| ; CHECK-NEXT: [[B:%.*]] = shl <2 x i44> [[A:%.*]], <i44 33, i44 33> |
| ; CHECK-NEXT: [[C:%.*]] = and <2 x i44> [[A]], <i44 2047, i44 2047> |
| ; CHECK-NEXT: [[D:%.*]] = or <2 x i44> [[B]], [[C]] |
| ; CHECK-NEXT: ret <2 x i44> [[D]] |
| ; |
| %B = shl <2 x i44> %A, <i44 33, i44 33> |
| %C = lshr <2 x i44> %B, <i44 33, i44 33> |
| %D = add <2 x i44> %B, %C |
| ret <2 x i44> %D |
| } |
| |
| ; Fold shl (lshr X, C), C -> and X, C' regardless of the number of uses of the lshr. |
| |
| define i43 @lshr_shl_eq_amt_multi_use(i43 %A) { |
| ; CHECK-LABEL: @lshr_shl_eq_amt_multi_use( |
| ; CHECK-NEXT: [[B:%.*]] = lshr i43 [[A:%.*]], 23 |
| ; CHECK-NEXT: [[C:%.*]] = and i43 [[A]], -8388608 |
| ; CHECK-NEXT: [[D:%.*]] = mul i43 [[B]], [[C]] |
| ; CHECK-NEXT: ret i43 [[D]] |
| ; |
| %B = lshr i43 %A, 23 |
| %C = shl i43 %B, 23 |
| %D = mul i43 %B, %C |
| ret i43 %D |
| } |
| |
| ; Fold vector shl (lshr X, C), C -> and X, C' regardless of the number of uses of the lshr. |
| |
| define <2 x i43> @lshr_shl_eq_amt_multi_use_splat_vec(<2 x i43> %A) { |
| ; CHECK-LABEL: @lshr_shl_eq_amt_multi_use_splat_vec( |
| ; CHECK-NEXT: [[B:%.*]] = lshr <2 x i43> [[A:%.*]], <i43 23, i43 23> |
| ; CHECK-NEXT: [[C:%.*]] = and <2 x i43> [[A]], <i43 -8388608, i43 -8388608> |
| ; CHECK-NEXT: [[D:%.*]] = mul <2 x i43> [[B]], [[C]] |
| ; CHECK-NEXT: ret <2 x i43> [[D]] |
| ; |
| %B = lshr <2 x i43> %A, <i43 23, i43 23> |
| %C = shl <2 x i43> %B, <i43 23, i43 23> |
| %D = mul <2 x i43> %B, %C |
| ret <2 x i43> %D |
| } |
| |
| define i37 @test25(i37 %AA, i37 %BB) { |
| ; CHECK-LABEL: @test25( |
| ; CHECK-NEXT: [[D:%.*]] = and i37 [[AA:%.*]], -131072 |
| ; CHECK-NEXT: [[C2:%.*]] = add i37 [[D]], [[BB:%.*]] |
| ; CHECK-NEXT: [[F:%.*]] = and i37 [[C2]], -131072 |
| ; CHECK-NEXT: ret i37 [[F]] |
| ; |
| %C = lshr i37 %BB, 17 |
| %D = lshr i37 %AA, 17 |
| %E = add i37 %D, %C |
| %F = shl i37 %E, 17 |
| ret i37 %F |
| } |
| |
| define i40 @test26(i40 %A) { |
| ; CHECK-LABEL: @test26( |
| ; CHECK-NEXT: [[B:%.*]] = and i40 [[A:%.*]], -2 |
| ; CHECK-NEXT: ret i40 [[B]] |
| ; |
| %B = lshr i40 %A, 1 |
| %C = bitcast i40 %B to i40 |
| %D = shl i40 %C, 1 |
| ret i40 %D |
| } |
| |
| ; OSS-Fuzz #9880 |
| ; https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=9880 |
| define i177 @ossfuzz_9880(i177 %X) { |
| ; CHECK-LABEL: @ossfuzz_9880( |
| ; CHECK-NEXT: [[A:%.*]] = alloca i177, align 8 |
| ; CHECK-NEXT: [[L1:%.*]] = load i177, ptr [[A]], align 4 |
| ; CHECK-NEXT: [[TMP1:%.*]] = icmp eq i177 [[L1]], -1 |
| ; CHECK-NEXT: [[B5_NEG:%.*]] = sext i1 [[TMP1]] to i177 |
| ; CHECK-NEXT: [[B14:%.*]] = add i177 [[L1]], [[B5_NEG]] |
| ; CHECK-NEXT: [[TMP2:%.*]] = icmp eq i177 [[B14]], -1 |
| ; CHECK-NEXT: [[B1:%.*]] = zext i1 [[TMP2]] to i177 |
| ; CHECK-NEXT: ret i177 [[B1]] |
| ; |
| %A = alloca i177 |
| %L1 = load i177, ptr %A |
| %B = or i177 0, -1 |
| %B5 = udiv i177 %L1, %B |
| %B4 = add i177 %B5, %B |
| %B2 = add i177 %B, %B4 |
| %B6 = mul i177 %B5, %B2 |
| %B20 = shl i177 %L1, %B6 |
| %B14 = sub i177 %B20, %B5 |
| %B1 = udiv i177 %B14, %B6 |
| ret i177 %B1 |
| } |