1; RUN: opt < %s -reassociate -S | FileCheck %s 2 3; Check that a*a*b+a*a*c is turned into a*(a*(b+c)). 4 5define float @fmultistep1(float %a, float %b, float %c) { 6; CHECK-LABEL: @fmultistep1( 7; CHECK-NEXT: [[REASS_ADD1:%.*]] = fadd fast float %c, %b 8; CHECK-NEXT: [[REASS_MUL2:%.*]] = fmul fast float %a, %a 9; CHECK-NEXT: [[REASS_MUL:%.*]] = fmul fast float [[REASS_MUL:%.*]]2, [[REASS_ADD1]] 10; CHECK-NEXT: ret float [[REASS_MUL]] 11; 12 %t0 = fmul fast float %a, %b 13 %t1 = fmul fast float %a, %t0 ; a*(a*b) 14 %t2 = fmul fast float %a, %c 15 %t3 = fmul fast float %a, %t2 ; a*(a*c) 16 %t4 = fadd fast float %t1, %t3 17 ret float %t4 18} 19 20; Check that a*b+a*c+d is turned into a*(b+c)+d. 21 22define float @fmultistep2(float %a, float %b, float %c, float %d) { 23; CHECK-LABEL: @fmultistep2( 24; CHECK-NEXT: [[REASS_ADD:%.*]] = fadd fast float %c, %b 25; CHECK-NEXT: [[REASS_MUL:%.*]] = fmul fast float [[REASS_ADD]], %a 26; CHECK-NEXT: [[T3:%.*]] = fadd fast float [[REASS_MUL]], %d 27; CHECK-NEXT: ret float [[T3]] 28; 29 %t0 = fmul fast float %a, %b 30 %t1 = fmul fast float %a, %c 31 %t2 = fadd fast float %t1, %d ; a*c+d 32 %t3 = fadd fast float %t0, %t2 ; a*b+(a*c+d) 33 ret float %t3 34} 35 36