fadd.ll
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S | FileCheck %s
declare void @use(float)
declare void @use_vec(<2 x float>)
; -x + y => y - x
define float @fneg_op0(float %x, float %y) {
; CHECK-LABEL: @fneg_op0(
; CHECK-NEXT: [[ADD:%.*]] = fsub float [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: ret float [[ADD]]
;
%neg = fsub float -0.0, %x
%add = fadd float %neg, %y
ret float %add
}
; x + -y => x - y
define float @fneg_op1(float %x, float %y) {
; CHECK-LABEL: @fneg_op1(
; CHECK-NEXT: [[ADD:%.*]] = fsub float [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: ret float [[ADD]]
;
%neg = fsub float -0.0, %y
%add = fadd float %x, %neg
ret float %add
}
; Z + (-X / Y) --> Z - (X / Y)
define double @fdiv_fneg1(double %x, double %y, double %pz) {
; CHECK-LABEL: @fdiv_fneg1(
; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = fdiv double [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
; CHECK-NEXT: ret double [[R]]
;
%z = frem double 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub double -0.000000e+00, %x
%div = fdiv double %neg, %y
%r = fadd double %z, %div
ret double %r
}
; Z + (Y / -X) --> Z - (Y / X)
define <2 x double> @fdiv_fneg2(<2 x double> %x, <2 x double> %y, <2 x double> %pz) {
; CHECK-LABEL: @fdiv_fneg2(
; CHECK-NEXT: [[Z:%.*]] = frem <2 x double> <double 4.200000e+01, double 8.000000e+00>, [[PZ:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = fdiv <2 x double> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub <2 x double> [[Z]], [[TMP1]]
; CHECK-NEXT: ret <2 x double> [[R]]
;
%z = frem <2 x double> <double 42.0, double 8.0>, %pz ; thwart complexity-based canonicalization
%neg = fsub <2 x double> <double -0.0, double -0.0>, %x
%div = fdiv <2 x double> %y, %neg
%r = fadd <2 x double> %z, %div
ret <2 x double> %r
}
; Z + (-X * Y) --> Z - (X * Y)
define double @fmul_fneg1(double %x, double %y, double %pz) {
; CHECK-LABEL: @fmul_fneg1(
; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = fmul double [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
; CHECK-NEXT: ret double [[R]]
;
%z = frem double 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub double -0.000000e+00, %x
%mul = fmul double %neg, %y
%r = fadd double %z, %mul
ret double %r
}
; Z + (Y * -X) --> Z - (Y * X)
define double @fmul_fneg2(double %x, double %py, double %pz) {
; CHECK-LABEL: @fmul_fneg2(
; CHECK-NEXT: [[Y:%.*]] = frem double -4.200000e+01, [[PY:%.*]]
; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = fmul double [[Y]], [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
; CHECK-NEXT: ret double [[R]]
;
%y = frem double -42.0, %py ; thwart complexity-based canonicalization
%z = frem double 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub double -0.000000e+00, %x
%mul = fmul double %y, %neg
%r = fadd double %z, %mul
ret double %r
}
; (-X / Y) + Z --> Z - (X / Y)
define double @fdiv_fneg1_commute(double %x, double %y, double %pz) {
; CHECK-LABEL: @fdiv_fneg1_commute(
; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = fdiv double [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
; CHECK-NEXT: ret double [[R]]
;
%z = frem double 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub double -0.000000e+00, %x
%div = fdiv double %neg, %y
%r = fadd double %div, %z
ret double %r
}
; (Y / -X) + Z --> Z - (Y / X)
define <2 x double> @fdiv_fneg2_commute(<2 x double> %x, <2 x double> %y, <2 x double> %pz) {
; CHECK-LABEL: @fdiv_fneg2_commute(
; CHECK-NEXT: [[Z:%.*]] = frem <2 x double> <double 4.200000e+01, double 8.000000e+00>, [[PZ:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = fdiv <2 x double> [[Y:%.*]], [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub <2 x double> [[Z]], [[TMP1]]
; CHECK-NEXT: ret <2 x double> [[R]]
;
%z = frem <2 x double> <double 42.0, double 8.0>, %pz ; thwart complexity-based canonicalization
%neg = fsub <2 x double> <double -0.0, double -0.0>, %x
%div = fdiv <2 x double> %y, %neg
%r = fadd <2 x double> %div, %z
ret <2 x double> %r
}
; (-X * Y) + Z --> Z - (X * Y)
define double @fmul_fneg1_commute(double %x, double %y, double %pz) {
; CHECK-LABEL: @fmul_fneg1_commute(
; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = fmul double [[X:%.*]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
; CHECK-NEXT: ret double [[R]]
;
%z = frem double 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub double -0.000000e+00, %x
%mul = fmul double %neg, %y
%r = fadd double %mul, %z
ret double %r
}
; (Y * -X) + Z --> Z - (Y * X)
define double @fmul_fneg2_commute(double %x, double %py, double %pz) {
; CHECK-LABEL: @fmul_fneg2_commute(
; CHECK-NEXT: [[Y:%.*]] = frem double 4.100000e+01, [[PY:%.*]]
; CHECK-NEXT: [[Z:%.*]] = frem double 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[TMP1:%.*]] = fmul double [[Y]], [[X:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub double [[Z]], [[TMP1]]
; CHECK-NEXT: ret double [[R]]
;
%y = frem double 41.0, %py ; thwart complexity-based canonicalization
%z = frem double 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub double -0.000000e+00, %x
%mul = fmul double %y, %neg
%r = fadd double %mul, %z
ret double %r
}
; Z + (-X / Y) - extra use means we can't transform to fsub without an extra instruction
define float @fdiv_fneg1_extra_use(float %x, float %y, float %pz) {
; CHECK-LABEL: @fdiv_fneg1_extra_use(
; CHECK-NEXT: [[Z:%.*]] = frem float 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[NEG]], [[Y:%.*]]
; CHECK-NEXT: call void @use(float [[DIV]])
; CHECK-NEXT: [[R:%.*]] = fadd float [[Z]], [[DIV]]
; CHECK-NEXT: ret float [[R]]
;
%z = frem float 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub float -0.000000e+00, %x
%div = fdiv float %neg, %y
call void @use(float %div)
%r = fadd float %z, %div
ret float %r
}
; Z + (Y / -X) - extra use means we can't transform to fsub without an extra instruction
define float @fdiv_fneg2_extra_use(float %x, float %py, float %pz) {
; CHECK-LABEL: @fdiv_fneg2_extra_use(
; CHECK-NEXT: [[Y:%.*]] = frem float -4.200000e+01, [[PY:%.*]]
; CHECK-NEXT: [[Z:%.*]] = frem float 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[Y]], [[NEG]]
; CHECK-NEXT: call void @use(float [[DIV]])
; CHECK-NEXT: [[R:%.*]] = fadd float [[Z]], [[DIV]]
; CHECK-NEXT: ret float [[R]]
;
%y = frem float -42.0, %py ; thwart complexity-based canonicalization
%z = frem float 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub float -0.000000e+00, %x
%div = fdiv float %y, %neg
call void @use(float %div)
%r = fadd float %z, %div
ret float %r
}
; Z + (-X * Y) - extra use means we can't transform to fsub without an extra instruction
define <2 x float> @fmul_fneg1_extra_use(<2 x float> %x, <2 x float> %y, <2 x float> %pz) {
; CHECK-LABEL: @fmul_fneg1_extra_use(
; CHECK-NEXT: [[Z:%.*]] = frem <2 x float> <float 4.200000e+01, float -1.000000e+00>, [[PZ:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, [[X:%.*]]
; CHECK-NEXT: [[MUL:%.*]] = fmul <2 x float> [[NEG]], [[Y:%.*]]
; CHECK-NEXT: call void @use_vec(<2 x float> [[MUL]])
; CHECK-NEXT: [[R:%.*]] = fadd <2 x float> [[Z]], [[MUL]]
; CHECK-NEXT: ret <2 x float> [[R]]
;
%z = frem <2 x float> <float 42.0, float -1.0>, %pz ; thwart complexity-based canonicalization
%neg = fsub <2 x float> <float -0.0, float -0.0>, %x
%mul = fmul <2 x float> %neg, %y
call void @use_vec(<2 x float> %mul)
%r = fadd <2 x float> %z, %mul
ret <2 x float> %r
}
; Z + (Y * -X) - extra use means we can't transform to fsub without an extra instruction
define float @fmul_fneg2_extra_use(float %x, float %py, float %pz) {
; CHECK-LABEL: @fmul_fneg2_extra_use(
; CHECK-NEXT: [[Y:%.*]] = frem float -4.200000e+01, [[PY:%.*]]
; CHECK-NEXT: [[Z:%.*]] = frem float 4.200000e+01, [[PZ:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[Y]], [[NEG]]
; CHECK-NEXT: call void @use(float [[MUL]])
; CHECK-NEXT: [[R:%.*]] = fadd float [[Z]], [[MUL]]
; CHECK-NEXT: ret float [[R]]
;
%y = frem float -42.0, %py ; thwart complexity-based canonicalization
%z = frem float 42.0, %pz ; thwart complexity-based canonicalization
%neg = fsub float -0.000000e+00, %x
%mul = fmul float %y, %neg
call void @use(float %mul)
%r = fadd float %z, %mul
ret float %r
}
; (-X / Y) + Z --> Z - (X / Y)
define float @fdiv_fneg1_extra_use2(float %x, float %y, float %z) {
; CHECK-LABEL: @fdiv_fneg1_extra_use2(
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: call void @use(float [[NEG]])
; CHECK-NEXT: [[TMP1:%.*]] = fdiv float [[X]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub float [[Z:%.*]], [[TMP1]]
; CHECK-NEXT: ret float [[R]]
;
%neg = fsub float -0.000000e+00, %x
call void @use(float %neg)
%div = fdiv float %neg, %y
%r = fadd float %div, %z
ret float %r
}
; (Y / -X) + Z --> Z - (Y / X)
define float @fdiv_fneg2_extra_use2(float %x, float %y, float %z) {
; CHECK-LABEL: @fdiv_fneg2_extra_use2(
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: call void @use(float [[NEG]])
; CHECK-NEXT: [[TMP1:%.*]] = fdiv float [[Y:%.*]], [[X]]
; CHECK-NEXT: [[R:%.*]] = fsub float [[Z:%.*]], [[TMP1]]
; CHECK-NEXT: ret float [[R]]
;
%neg = fsub float -0.000000e+00, %x
call void @use(float %neg)
%div = fdiv float %y, %neg
%r = fadd float %div, %z
ret float %r
}
; (-X * Y) + Z --> Z - (X * Y)
define <2 x float> @fmul_fneg1_extra_use2(<2 x float> %x, <2 x float> %y, <2 x float> %z) {
; CHECK-LABEL: @fmul_fneg1_extra_use2(
; CHECK-NEXT: [[NEG:%.*]] = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, [[X:%.*]]
; CHECK-NEXT: call void @use_vec(<2 x float> [[NEG]])
; CHECK-NEXT: [[TMP1:%.*]] = fmul <2 x float> [[X]], [[Y:%.*]]
; CHECK-NEXT: [[R:%.*]] = fsub <2 x float> [[Z:%.*]], [[TMP1]]
; CHECK-NEXT: ret <2 x float> [[R]]
;
%neg = fsub <2 x float> <float -0.0, float -0.0>, %x
call void @use_vec(<2 x float> %neg)
%mul = fmul <2 x float> %neg, %y
%r = fadd <2 x float> %mul, %z
ret <2 x float> %r
}
; (Y * -X) + Z --> Z - (Y * X)
define float @fmul_fneg2_extra_use2(float %x, float %py, float %z) {
; CHECK-LABEL: @fmul_fneg2_extra_use2(
; CHECK-NEXT: [[Y:%.*]] = frem float -4.200000e+01, [[PY:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: call void @use(float [[NEG]])
; CHECK-NEXT: [[TMP1:%.*]] = fmul float [[Y]], [[X]]
; CHECK-NEXT: [[R:%.*]] = fsub float [[Z:%.*]], [[TMP1]]
; CHECK-NEXT: ret float [[R]]
;
%y = frem float -42.0, %py ; thwart complexity-based canonicalization
%neg = fsub float -0.000000e+00, %x
call void @use(float %neg)
%mul = fmul float %y, %neg
%r = fadd float %mul, %z
ret float %r
}
; (-X / Y) + Z --> Z - (X / Y)
define float @fdiv_fneg1_extra_use3(float %x, float %y, float %z) {
; CHECK-LABEL: @fdiv_fneg1_extra_use3(
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: call void @use(float [[NEG]])
; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[NEG]], [[Y:%.*]]
; CHECK-NEXT: call void @use(float [[DIV]])
; CHECK-NEXT: [[R:%.*]] = fadd float [[DIV]], [[Z:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%neg = fsub float -0.000000e+00, %x
call void @use(float %neg)
%div = fdiv float %neg, %y
call void @use(float %div)
%r = fadd float %div, %z
ret float %r
}
; (Y / -X) + Z --> Z - (Y / X)
define float @fdiv_fneg2_extra_use3(float %x, float %y, float %z) {
; CHECK-LABEL: @fdiv_fneg2_extra_use3(
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: call void @use(float [[NEG]])
; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[Y:%.*]], [[NEG]]
; CHECK-NEXT: call void @use(float [[DIV]])
; CHECK-NEXT: [[R:%.*]] = fadd float [[DIV]], [[Z:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%neg = fsub float -0.000000e+00, %x
call void @use(float %neg)
%div = fdiv float %y, %neg
call void @use(float %div)
%r = fadd float %div, %z
ret float %r
}
; (-X * Y) + Z --> Z - (X * Y)
define <2 x float> @fmul_fneg1_extra_use3(<2 x float> %x, <2 x float> %y, <2 x float> %z) {
; CHECK-LABEL: @fmul_fneg1_extra_use3(
; CHECK-NEXT: [[NEG:%.*]] = fsub <2 x float> <float -0.000000e+00, float -0.000000e+00>, [[X:%.*]]
; CHECK-NEXT: call void @use_vec(<2 x float> [[NEG]])
; CHECK-NEXT: [[MUL:%.*]] = fmul <2 x float> [[NEG]], [[Y:%.*]]
; CHECK-NEXT: call void @use_vec(<2 x float> [[MUL]])
; CHECK-NEXT: [[R:%.*]] = fadd <2 x float> [[MUL]], [[Z:%.*]]
; CHECK-NEXT: ret <2 x float> [[R]]
;
%neg = fsub <2 x float> <float -0.0, float -0.0>, %x
call void @use_vec(<2 x float> %neg)
%mul = fmul <2 x float> %neg, %y
call void @use_vec(<2 x float> %mul)
%r = fadd <2 x float> %mul, %z
ret <2 x float> %r
}
; (Y * -X) + Z --> Z - (Y * X)
define float @fmul_fneg2_extra_use3(float %x, float %py, float %z) {
; CHECK-LABEL: @fmul_fneg2_extra_use3(
; CHECK-NEXT: [[Y:%.*]] = frem float -4.200000e+01, [[PY:%.*]]
; CHECK-NEXT: [[NEG:%.*]] = fsub float -0.000000e+00, [[X:%.*]]
; CHECK-NEXT: call void @use(float [[NEG]])
; CHECK-NEXT: [[MUL:%.*]] = fmul float [[Y]], [[NEG]]
; CHECK-NEXT: call void @use(float [[MUL]])
; CHECK-NEXT: [[R:%.*]] = fadd float [[MUL]], [[Z:%.*]]
; CHECK-NEXT: ret float [[R]]
;
%y = frem float -42.0, %py ; thwart complexity-based canonicalization
%neg = fsub float -0.000000e+00, %x
call void @use(float %neg)
%mul = fmul float %y, %neg
call void @use(float %mul)
%r = fadd float %mul, %z
ret float %r
}