1; NOTE: Assertions have been autogenerated by utils/update_test_checks.py 2; RUN: opt < %s -slp-vectorizer -mattr=+avx2 -S | FileCheck %s 3 4target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128" 5target triple = "x86_64-unknown-linux-gnu" 6 7; In this test case we start trying to vectorize reduction but end up 8; in tryToVectorize() method which then can make several attempts to 9; find a pair (roots) for a tree that can be vectorized. 10; The order (path) it makes probes for various pairs is predefined by 11; the method implementation and it is not guaranteed that the best option 12; encountered first (like here). 13 14define double @root_selection(double %a, double %b, double %c, double %d) local_unnamed_addr #0 { 15; CHECK-LABEL: @root_selection( 16; CHECK-NEXT: [[TMP1:%.*]] = insertelement <2 x double> poison, double [[A:%.*]], i32 0 17; CHECK-NEXT: [[TMP2:%.*]] = insertelement <2 x double> [[TMP1]], double [[B:%.*]], i32 1 18; CHECK-NEXT: [[TMP3:%.*]] = fdiv fast <2 x double> [[TMP2]], <double 7.000000e+00, double 5.000000e+00> 19; CHECK-NEXT: [[TMP4:%.*]] = extractelement <2 x double> [[TMP3]], i32 1 20; CHECK-NEXT: [[I11:%.*]] = fmul fast double [[TMP4]], undef 21; CHECK-NEXT: [[TMP5:%.*]] = fmul fast <2 x double> [[TMP3]], <double 3.000000e+00, double undef> 22; CHECK-NEXT: [[TMP6:%.*]] = fmul fast <2 x double> undef, [[TMP5]] 23; CHECK-NEXT: [[TMP7:%.*]] = fsub fast <2 x double> undef, [[TMP5]] 24; CHECK-NEXT: [[TMP8:%.*]] = shufflevector <2 x double> [[TMP6]], <2 x double> [[TMP7]], <2 x i32> <i32 0, i32 3> 25; CHECK-NEXT: [[TMP9:%.*]] = insertelement <2 x double> <double undef, double poison>, double [[I11]], i32 1 26; CHECK-NEXT: [[TMP10:%.*]] = fsub fast <2 x double> [[TMP8]], [[TMP9]] 27; CHECK-NEXT: [[TMP11:%.*]] = fmul fast <2 x double> [[TMP8]], [[TMP9]] 28; CHECK-NEXT: [[TMP12:%.*]] = shufflevector <2 x double> [[TMP10]], <2 x double> [[TMP11]], <2 x i32> <i32 0, i32 3> 29; CHECK-NEXT: [[TMP13:%.*]] = fmul fast <2 x double> [[TMP12]], <double 4.000000e+00, double 1.100000e+01> 30; CHECK-NEXT: [[TMP14:%.*]] = fsub fast <2 x double> [[TMP12]], <double 4.000000e+00, double 1.100000e+01> 31; CHECK-NEXT: [[TMP15:%.*]] = shufflevector <2 x double> [[TMP13]], <2 x double> [[TMP14]], <2 x i32> <i32 0, i32 3> 32; CHECK-NEXT: [[TMP16:%.*]] = fdiv fast <2 x double> [[TMP15]], <double 1.400000e+00, double 1.200000e+01> 33; CHECK-NEXT: [[TMP17:%.*]] = fmul fast <2 x double> [[TMP15]], <double 1.400000e+00, double 1.200000e+01> 34; CHECK-NEXT: [[TMP18:%.*]] = shufflevector <2 x double> [[TMP16]], <2 x double> [[TMP17]], <2 x i32> <i32 0, i32 3> 35; CHECK-NEXT: [[TMP19:%.*]] = fadd fast <2 x double> [[TMP18]], <double undef, double 1.400000e+00> 36; CHECK-NEXT: [[TMP20:%.*]] = fdiv fast <2 x double> [[TMP18]], <double undef, double 1.400000e+00> 37; CHECK-NEXT: [[TMP21:%.*]] = shufflevector <2 x double> [[TMP19]], <2 x double> [[TMP20]], <2 x i32> <i32 0, i32 3> 38; CHECK-NEXT: [[TMP22:%.*]] = extractelement <2 x double> [[TMP21]], i32 0 39; CHECK-NEXT: [[TMP23:%.*]] = extractelement <2 x double> [[TMP21]], i32 1 40; CHECK-NEXT: [[I16:%.*]] = fadd fast double [[TMP22]], [[TMP23]] 41; CHECK-NEXT: [[I17:%.*]] = fadd fast double [[I16]], [[C:%.*]] 42; CHECK-NEXT: [[I18:%.*]] = fadd fast double [[I17]], [[D:%.*]] 43; CHECK-NEXT: ret double [[I18]] 44; 45 %i01 = fdiv fast double %a, 7.0 46 %i02 = fmul fast double %i01, 3.0 47 %i03 = fmul fast double undef, %i02 48 %i04 = fsub fast double %i03, undef 49 %i05 = fmul fast double %i04, 4.0 50 %i06 = fdiv fast double %i05, 1.4 51 %i07 = fadd fast double undef, %i06 52 %i08 = fdiv fast double %b, 5.0 53 %i09 = fmul fast double %i08, undef 54 %i10 = fsub fast double undef, %i09 55 %i11 = fmul fast double %i08, undef 56 %i12 = fmul fast double %i10, %i11 57 %i13 = fsub fast double %i12, 11.0 58 %i14 = fmul fast double %i13, 12.0 59 %i15 = fdiv fast double %i14, 1.4 60 %i16 = fadd fast double %i07, %i15 61 %i17 = fadd fast double %i16, %c 62 %i18 = fadd fast double %i17, %d 63 ret double %i18 64} 65 66attributes #0 = { "unsafe-fp-math"="true" } 67