1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -passes=reassociate -S | FileCheck %s 3 4; Don't produce an instruction that is a no-op because the constant is an identity constant. 5 6define i32 @add_0(i32 %x) { 7; CHECK-LABEL: @add_0( 8; CHECK-NEXT: ret i32 [[X:%.*]] 9; 10 %a1 = add i32 %x, -30 11 %a2 = add i32 %a1, 30 12 ret i32 %a2 13} 14 15define i32 @mul_1(i32 %x) { 16; CHECK-LABEL: @mul_1( 17; CHECK-NEXT: ret i32 [[X:%.*]] 18; 19 %a1 = mul i32 %x, -1 20 %a2 = mul i32 %a1, -1 21 ret i32 %a2 22} 23 24define i8 @and_neg1(i8 %x) { 25; CHECK-LABEL: @and_neg1( 26; CHECK-NEXT: ret i8 [[X:%.*]] 27; 28 %a1 = and i8 %x, 255 29 %a2 = and i8 %a1, 255 30 ret i8 %a2 31} 32 33define i8 @or_0(i8 %x) { 34; CHECK-LABEL: @or_0( 35; CHECK-NEXT: ret i8 [[X:%.*]] 36; 37 %a1 = or i8 %x, 0 38 %a2 = or i8 %a1, 0 39 ret i8 %a2 40} 41 42define i8 @xor_0(i8 %x) { 43; CHECK-LABEL: @xor_0( 44; CHECK-NEXT: ret i8 [[X:%.*]] 45; 46 %a1 = xor i8 %x, 42 47 %a2 = xor i8 %a1, 42 48 ret i8 %a2 49} 50 51; FIXME - the binop identity constant for fadd is -0.0, so this didn't fold. 52 53define float @fadd_0(float %x) { 54; CHECK-LABEL: @fadd_0( 55; CHECK-NEXT: [[A2:%.*]] = fadd fast float [[X:%.*]], 0.000000e+00 56; CHECK-NEXT: ret float [[A2]] 57; 58 %a1 = fadd fast float %x, -30.0 59 %a2 = fadd fast float %a1, 30.0 60 ret float %a2 61} 62 63define float @fmul_1(float %x) { 64; CHECK-LABEL: @fmul_1( 65; CHECK-NEXT: ret float [[X:%.*]] 66; 67 %a1 = fmul fast float %x, 4.0 68 %a2 = fmul fast float %a1, 0.25 69 ret float %a2 70} 71 72