1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 4 2; RUN: opt < %s -passes=reassociate,instcombine -S | FileCheck %s 3 4; Not marked as fast, so must not change. 5define float @test1(float %a0, float %a1, float %a2, float %a3, float %a4) { 6; CHECK-LABEL: define float @test1( 7; CHECK-SAME: float [[A0:%.*]], float [[A1:%.*]], float [[A2:%.*]], float [[A3:%.*]], float [[A4:%.*]]) { 8; CHECK-NEXT: [[TMP_2:%.*]] = fadd float [[A3]], [[A4]] 9; CHECK-NEXT: [[TMP_4:%.*]] = fadd float [[A2]], [[TMP_2]] 10; CHECK-NEXT: [[TMP_6:%.*]] = fadd float [[A1]], [[TMP_4]] 11; CHECK-NEXT: [[TMP_8:%.*]] = fadd float [[A0]], [[TMP_6]] 12; CHECK-NEXT: [[TMP_11:%.*]] = fadd float [[A2]], [[A3]] 13; CHECK-NEXT: [[TMP_13:%.*]] = fadd float [[A1]], [[TMP_11]] 14; CHECK-NEXT: [[TMP_15:%.*]] = fadd float [[A0]], [[TMP_13]] 15; CHECK-NEXT: [[TMP_18:%.*]] = fadd float [[A1]], [[A2]] 16; CHECK-NEXT: [[TMP_20:%.*]] = fadd float [[A0]], [[TMP_18]] 17; CHECK-NEXT: [[TMP_23:%.*]] = fadd float [[A0]], [[A1]] 18; CHECK-NEXT: [[TMP_26:%.*]] = fsub float [[TMP_8]], [[TMP_15]] 19; CHECK-NEXT: [[TMP_28:%.*]] = fadd float [[TMP_20]], [[TMP_26]] 20; CHECK-NEXT: [[TMP_30:%.*]] = fsub float [[TMP_28]], [[TMP_23]] 21; CHECK-NEXT: [[TMP_32:%.*]] = fsub float [[TMP_30]], [[A4]] 22; CHECK-NEXT: [[TMP_34:%.*]] = fsub float [[TMP_32]], [[A2]] 23; CHECK-NEXT: [[T:%.*]] = fmul float [[TMP_34]], [[TMP_34]] 24; CHECK-NEXT: ret float [[T]] 25; 26 27 %tmp.2 = fadd float %a4, %a3 28 %tmp.4 = fadd float %tmp.2, %a2 29 %tmp.6 = fadd float %tmp.4, %a1 30 %tmp.8 = fadd float %tmp.6, %a0 31 %tmp.11 = fadd float %a3, %a2 32 %tmp.13 = fadd float %tmp.11, %a1 33 %tmp.15 = fadd float %tmp.13, %a0 34 %tmp.18 = fadd float %a2, %a1 35 %tmp.20 = fadd float %tmp.18, %a0 36 %tmp.23 = fadd float %a1, %a0 37 %tmp.26 = fsub float %tmp.8, %tmp.15 38 %tmp.28 = fadd float %tmp.26, %tmp.20 39 %tmp.30 = fsub float %tmp.28, %tmp.23 40 %tmp.32 = fsub float %tmp.30, %a4 41 %tmp.34 = fsub float %tmp.32, %a2 42 %T = fmul float %tmp.34, %tmp.34 43 ret float %T 44} 45 46; Should be able to eliminate everything. 47define float @test2(float %a0, float %a1, float %a2, float %a3, float %a4) { 48; CHECK-LABEL: define float @test2( 49; CHECK-SAME: float [[A0:%.*]], float [[A1:%.*]], float [[A2:%.*]], float [[A3:%.*]], float [[A4:%.*]]) { 50; CHECK-NEXT: ret float 0.000000e+00 51; 52 53 %tmp.2 = fadd fast float %a4, %a3 54 %tmp.4 = fadd fast float %tmp.2, %a2 55 %tmp.6 = fadd fast float %tmp.4, %a1 56 %tmp.8 = fadd fast float %tmp.6, %a0 57 %tmp.11 = fadd fast float %a3, %a2 58 %tmp.13 = fadd fast float %tmp.11, %a1 59 %tmp.15 = fadd fast float %tmp.13, %a0 60 %tmp.18 = fadd fast float %a2, %a1 61 %tmp.20 = fadd fast float %tmp.18, %a0 62 %tmp.23 = fadd fast float %a1, %a0 63 %tmp.26 = fsub fast float %tmp.8, %tmp.15 64 %tmp.28 = fadd fast float %tmp.26, %tmp.20 65 %tmp.30 = fsub fast float %tmp.28, %tmp.23 66 %tmp.32 = fsub fast float %tmp.30, %a4 67 %tmp.34 = fsub fast float %tmp.32, %a2 68 %T = fmul fast float %tmp.34, %tmp.34 69 ret float %T 70} 71