Commit 499c90af authored by Sanjay Patel's avatar Sanjay Patel
Browse files

[InstSimplify] add more tests for fcmp+select; NFC 

The addition of FMF for select allows more folding for these
kinds of patterns.
parent ef85f475

llvm/test/Transforms/InstSimplify/fcmp-select.ll

+156 −0
Original line number Diff line number Diff line
@@ -48,6 +48,162 @@ define double @une_swapped(double %x) { 
  ret double %cond

}



; X == 0.0 ? X : 0.0 --> ? (X could be -0.0)



define double @oeq_zero(double %x) {

; CHECK-LABEL: @oeq_zero(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp oeq double [[X:%.*]], 0.000000e+00

; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], double [[X]], double 0.000000e+00

; CHECK-NEXT:    ret double [[COND]]

;

  %cmp = fcmp oeq double %x, 0.0

  %cond = select i1 %cmp, double %x, double 0.0

  ret double %cond

}



; X == 0.0 ? 0.0 : X --> ? (change sign if X is -0.0)



define float @oeq_zero_swapped(float %x) {

; CHECK-LABEL: @oeq_zero_swapped(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp oeq float [[X:%.*]], 0.000000e+00

; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], float 0.000000e+00, float [[X]]

; CHECK-NEXT:    ret float [[COND]]

;

  %cmp = fcmp oeq float %x, 0.0

  %cond = select i1 %cmp, float 0.0, float %x

  ret float %cond

}



; X != 0.0 ? X : -0.0 --> ? (change sign if X is 0.0)



define double @une_zero(double %x) {

; CHECK-LABEL: @une_zero(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp une double [[X:%.*]], 0.000000e+00

; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], double [[X]], double -0.000000e+00

; CHECK-NEXT:    ret double [[COND]]

;

  %cmp = fcmp une double %x, 0.0

  %cond = select i1 %cmp, double %x, double -0.0

  ret double %cond

}



; X != 0.0 ? -0.0 : X --> ? (X could be 0.0)



define double @une_zero_swapped(double %x) {

; CHECK-LABEL: @une_zero_swapped(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp une double [[X:%.*]], 0.000000e+00

; CHECK-NEXT:    [[COND:%.*]] = select i1 [[CMP]], double -0.000000e+00, double [[X]]

; CHECK-NEXT:    ret double [[COND]]

;

  %cmp = fcmp une double %x, 0.0

  %cond = select i1 %cmp, double -0.0, double %x

  ret double %cond

}



; X == 0.0 ? X : 0.0 --> 0.0



define double @oeq_zero_nsz(double %x) {

; CHECK-LABEL: @oeq_zero_nsz(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp oeq double [[X:%.*]], 0.000000e+00

; CHECK-NEXT:    [[COND:%.*]] = select nsz i1 [[CMP]], double [[X]], double 0.000000e+00

; CHECK-NEXT:    ret double [[COND]]

;

  %cmp = fcmp oeq double %x, 0.0

  %cond = select nsz i1 %cmp, double %x, double 0.0

  ret double %cond

}



; X == 0.0 ? 0.0 : X --> X



define float @oeq_zero_swapped_nsz(float %x) {

; CHECK-LABEL: @oeq_zero_swapped_nsz(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp oeq float [[X:%.*]], 0.000000e+00

; CHECK-NEXT:    [[COND:%.*]] = select fast i1 [[CMP]], float 0.000000e+00, float [[X]]

; CHECK-NEXT:    ret float [[COND]]

;

  %cmp = fcmp oeq float %x, 0.0

  %cond = select fast i1 %cmp, float 0.0, float %x

  ret float %cond

}



; X != 0.0 ? X : -0.0 --> X



define double @une_zero_nsz(double %x) {

; CHECK-LABEL: @une_zero_nsz(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp une double [[X:%.*]], 0.000000e+00

; CHECK-NEXT:    [[COND:%.*]] = select ninf nsz i1 [[CMP]], double [[X]], double -0.000000e+00

; CHECK-NEXT:    ret double [[COND]]

;

  %cmp = fcmp une double %x, 0.0

  %cond = select nsz ninf i1 %cmp, double %x, double -0.0

  ret double %cond

}



; X != 0.0 ? -0.0 : X --> 0.0



define <2 x double> @une_zero_swapped_nsz(<2 x double> %x) {

; CHECK-LABEL: @une_zero_swapped_nsz(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp une <2 x double> [[X:%.*]], <double -0.000000e+00, double 0.000000e+00>

; CHECK-NEXT:    [[COND:%.*]] = select nsz <2 x i1> [[CMP]], <2 x double> <double 0.000000e+00, double -0.000000e+00>, <2 x double> [[X]]

; CHECK-NEXT:    ret <2 x double> [[COND]]

;

  %cmp = fcmp une <2 x double> %x, <double -0.0, double 0.0>

  %cond = select nsz <2 x i1> %cmp, <2 x double> <double 0.0, double -0.0>, <2 x double> %x

  ret <2 x double> %cond

}



; X == Y ? X : Y --> Y



define double @oeq_nsz(double %x, double %y) {

; CHECK-LABEL: @oeq_nsz(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp oeq double [[X:%.*]], [[Y:%.*]]

; CHECK-NEXT:    [[COND:%.*]] = select fast i1 [[CMP]], double [[X]], double [[Y]]

; CHECK-NEXT:    ret double [[COND]]

;

  %cmp = fcmp oeq double %x, %y

  %cond = select fast i1 %cmp, double %x, double %y

  ret double %cond

}



; X == Y ? Y : X --> X



define <2 x float> @oeq_swapped_nsz(<2 x float> %x, <2 x float> %y) {

; CHECK-LABEL: @oeq_swapped_nsz(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp oeq <2 x float> [[X:%.*]], [[Y:%.*]]

; CHECK-NEXT:    [[COND:%.*]] = select nnan nsz <2 x i1> [[CMP]], <2 x float> [[Y]], <2 x float> [[X]]

; CHECK-NEXT:    ret <2 x float> [[COND]]

;

  %cmp = fcmp oeq <2 x float> %x, %y

  %cond = select nsz nnan <2 x i1> %cmp, <2 x float> %y, <2 x float> %x

  ret <2 x float> %cond

}



; X != Y ? X : Y --> X



define double @une_nsz(double %x, double %y) {

; CHECK-LABEL: @une_nsz(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]

; CHECK-NEXT:    [[COND:%.*]] = select nsz i1 [[CMP]], double [[X]], double [[Y]]

; CHECK-NEXT:    ret double [[COND]]

;

  %cmp = fcmp une double %x, %y

  %cond = select nsz i1 %cmp, double %x, double %y

  ret double %cond

}



; X != Y ? Y : X --> Y



define <2 x double> @une_swapped_nsz(<2 x double> %x, <2 x double> %y) {

; CHECK-LABEL: @une_swapped_nsz(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp une <2 x double> [[X:%.*]], [[Y:%.*]]

; CHECK-NEXT:    [[COND:%.*]] = select fast <2 x i1> [[CMP]], <2 x double> [[Y]], <2 x double> [[X]]

; CHECK-NEXT:    ret <2 x double> [[COND]]

;

  %cmp = fcmp une <2 x double> %x, %y

  %cond = select fast <2 x i1> %cmp, <2 x double> %y, <2 x double> %x

  ret <2 x double> %cond

}



define double @une_could_be_negzero(double %x, double %y) {

; CHECK-LABEL: @une_could_be_negzero(

; CHECK-NEXT:    [[CMP:%.*]] = fcmp une double [[X:%.*]], [[Y:%.*]]