522 lines
14 KiB
LLVM
522 lines
14 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -instsimplify -S | FileCheck %s
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;; x * 0 ==> 0 when no-nans and no-signed-zero
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define float @mul_zero_1(float %a) {
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; CHECK-LABEL: @mul_zero_1(
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; CHECK-NEXT: ret float 0.000000e+00
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;
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%b = fmul nsz nnan float %a, 0.0
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ret float %b
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}
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define float @mul_zero_2(float %a) {
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; CHECK-LABEL: @mul_zero_2(
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; CHECK-NEXT: ret float 0.000000e+00
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;
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%b = fmul fast float 0.0, %a
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ret float %b
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}
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define <2 x float> @mul_zero_nsz_nnan_vec_undef(<2 x float> %a) {
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; CHECK-LABEL: @mul_zero_nsz_nnan_vec_undef(
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; CHECK-NEXT: ret <2 x float> zeroinitializer
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;
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%b = fmul nsz nnan <2 x float> %a, <float 0.0, float undef>
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ret <2 x float> %b
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}
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;; x * 0 =/=> 0 when there could be nans or -0
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define float @no_mul_zero_1(float %a) {
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; CHECK-LABEL: @no_mul_zero_1(
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; CHECK-NEXT: [[B:%.*]] = fmul nsz float [[A:%.*]], 0.000000e+00
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; CHECK-NEXT: ret float [[B]]
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;
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%b = fmul nsz float %a, 0.0
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ret float %b
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}
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define float @no_mul_zero_2(float %a) {
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; CHECK-LABEL: @no_mul_zero_2(
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; CHECK-NEXT: [[B:%.*]] = fmul nnan float [[A:%.*]], 0.000000e+00
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; CHECK-NEXT: ret float [[B]]
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;
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%b = fmul nnan float %a, 0.0
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ret float %b
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}
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define float @no_mul_zero_3(float %a) {
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; CHECK-LABEL: @no_mul_zero_3(
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; CHECK-NEXT: [[B:%.*]] = fmul float [[A:%.*]], 0.000000e+00
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; CHECK-NEXT: ret float [[B]]
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;
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%b = fmul float %a, 0.0
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ret float %b
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}
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; -X + X --> 0.0 (with nnan on the fadd)
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define float @fadd_binary_fnegx(float %x) {
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; CHECK-LABEL: @fadd_binary_fnegx(
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; CHECK-NEXT: ret float 0.000000e+00
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;
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%negx = fsub float -0.0, %x
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%r = fadd nnan float %negx, %x
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ret float %r
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}
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define float @fadd_unary_fnegx(float %x) {
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; CHECK-LABEL: @fadd_unary_fnegx(
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; CHECK-NEXT: ret float 0.000000e+00
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;
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%negx = fneg float %x
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%r = fadd nnan float %negx, %x
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ret float %r
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}
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; X + -X --> 0.0 (with nnan on the fadd)
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define <2 x float> @fadd_binary_fnegx_commute_vec(<2 x float> %x) {
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; CHECK-LABEL: @fadd_binary_fnegx_commute_vec(
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; CHECK-NEXT: ret <2 x float> zeroinitializer
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;
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%negx = fsub <2 x float> <float -0.0, float -0.0>, %x
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%r = fadd nnan <2 x float> %x, %negx
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ret <2 x float> %r
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}
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define <2 x float> @fadd_unary_fnegx_commute_vec(<2 x float> %x) {
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; CHECK-LABEL: @fadd_unary_fnegx_commute_vec(
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; CHECK-NEXT: ret <2 x float> zeroinitializer
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;
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%negx = fneg <2 x float> %x
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%r = fadd nnan <2 x float> %x, %negx
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ret <2 x float> %r
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}
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define <2 x float> @fadd_fnegx_commute_vec_undef(<2 x float> %x) {
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; CHECK-LABEL: @fadd_fnegx_commute_vec_undef(
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; CHECK-NEXT: ret <2 x float> zeroinitializer
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;
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%negx = fsub <2 x float> <float undef, float -0.0>, %x
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%r = fadd nnan <2 x float> %x, %negx
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ret <2 x float> %r
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}
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; https://bugs.llvm.org/show_bug.cgi?id=26958
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; https://bugs.llvm.org/show_bug.cgi?id=27151
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define float @fadd_binary_fneg_nan(float %x) {
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; CHECK-LABEL: @fadd_binary_fneg_nan(
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; CHECK-NEXT: [[T:%.*]] = fsub nnan float -0.000000e+00, [[X:%.*]]
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; CHECK-NEXT: [[COULD_BE_NAN:%.*]] = fadd ninf float [[T]], [[X]]
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; CHECK-NEXT: ret float [[COULD_BE_NAN]]
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;
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%t = fsub nnan float -0.0, %x
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%could_be_nan = fadd ninf float %t, %x
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ret float %could_be_nan
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}
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define float @fadd_unary_fneg_nan(float %x) {
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; CHECK-LABEL: @fadd_unary_fneg_nan(
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; CHECK-NEXT: [[T:%.*]] = fneg nnan float [[X:%.*]]
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; CHECK-NEXT: [[COULD_BE_NAN:%.*]] = fadd ninf float [[T]], [[X]]
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; CHECK-NEXT: ret float [[COULD_BE_NAN]]
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;
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%t = fneg nnan float %x
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%could_be_nan = fadd ninf float %t, %x
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ret float %could_be_nan
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}
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define float @fadd_binary_fneg_nan_commute(float %x) {
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; CHECK-LABEL: @fadd_binary_fneg_nan_commute(
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; CHECK-NEXT: [[T:%.*]] = fsub nnan ninf float -0.000000e+00, [[X:%.*]]
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; CHECK-NEXT: [[COULD_BE_NAN:%.*]] = fadd float [[X]], [[T]]
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; CHECK-NEXT: ret float [[COULD_BE_NAN]]
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;
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%t = fsub nnan ninf float -0.0, %x
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%could_be_nan = fadd float %x, %t
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ret float %could_be_nan
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}
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define float @fadd_unary_fneg_nan_commute(float %x) {
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; CHECK-LABEL: @fadd_unary_fneg_nan_commute(
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; CHECK-NEXT: [[T:%.*]] = fneg nnan ninf float [[X:%.*]]
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; CHECK-NEXT: [[COULD_BE_NAN:%.*]] = fadd float [[X]], [[T]]
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; CHECK-NEXT: ret float [[COULD_BE_NAN]]
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;
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%t = fneg nnan ninf float %x
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%could_be_nan = fadd float %x, %t
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ret float %could_be_nan
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}
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; X + (0.0 - X) --> 0.0 (with nnan on the fadd)
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define float @fadd_fsub_nnan_ninf(float %x) {
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; CHECK-LABEL: @fadd_fsub_nnan_ninf(
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; CHECK-NEXT: ret float 0.000000e+00
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;
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%sub = fsub float 0.0, %x
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%zero = fadd nnan ninf float %x, %sub
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ret float %zero
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}
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; (0.0 - X) + X --> 0.0 (with nnan on the fadd)
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define <2 x float> @fadd_fsub_nnan_ninf_commute_vec(<2 x float> %x) {
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; CHECK-LABEL: @fadd_fsub_nnan_ninf_commute_vec(
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; CHECK-NEXT: ret <2 x float> zeroinitializer
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;
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%sub = fsub <2 x float> zeroinitializer, %x
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%zero = fadd nnan ninf <2 x float> %sub, %x
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ret <2 x float> %zero
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}
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; 'ninf' is not required because 'nnan' allows us to assume
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; that X is not INF or -INF (adding opposite INFs would be NaN).
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define float @fadd_fsub_nnan(float %x) {
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; CHECK-LABEL: @fadd_fsub_nnan(
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; CHECK-NEXT: ret float 0.000000e+00
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;
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%sub = fsub float 0.0, %x
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%zero = fadd nnan float %sub, %x
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ret float %zero
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}
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; fsub nnan x, x ==> 0.0
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define float @fsub_x_x(float %a) {
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; CHECK-LABEL: @fsub_x_x(
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; CHECK-NEXT: [[NO_ZERO1:%.*]] = fsub ninf float [[A:%.*]], [[A]]
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; CHECK-NEXT: [[NO_ZERO2:%.*]] = fsub float [[A]], [[A]]
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; CHECK-NEXT: [[NO_ZERO:%.*]] = fadd float [[NO_ZERO1]], [[NO_ZERO2]]
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; CHECK-NEXT: ret float [[NO_ZERO]]
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;
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; X - X ==> 0
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%zero1 = fsub nnan float %a, %a
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; Dont fold
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%no_zero1 = fsub ninf float %a, %a
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%no_zero2 = fsub float %a, %a
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%no_zero = fadd float %no_zero1, %no_zero2
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; Should get folded
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%ret = fadd nsz float %no_zero, %zero1
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ret float %ret
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}
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; fsub nsz 0.0, (fsub 0.0, X) ==> X
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define float @fsub_0_0_x(float %a) {
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; CHECK-LABEL: @fsub_0_0_x(
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; CHECK-NEXT: ret float [[A:%.*]]
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;
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%t1 = fsub float 0.0, %a
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%ret = fsub nsz float 0.0, %t1
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ret float %ret
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}
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; fsub nsz 0.0, (fneg X) ==> X
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define float @fneg_x(float %a) {
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; CHECK-LABEL: @fneg_x(
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; CHECK-NEXT: ret float [[A:%.*]]
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;
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%t1 = fneg float %a
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%ret = fsub nsz float 0.0, %t1
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ret float %ret
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}
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define <2 x float> @fsub_0_0_x_vec_undef1(<2 x float> %a) {
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; CHECK-LABEL: @fsub_0_0_x_vec_undef1(
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; CHECK-NEXT: ret <2 x float> [[A:%.*]]
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;
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%t1 = fsub <2 x float> <float 0.0, float undef>, %a
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%ret = fsub nsz <2 x float> zeroinitializer, %t1
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ret <2 x float> %ret
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}
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define <2 x float> @fneg_x_vec_undef1(<2 x float> %a) {
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; CHECK-LABEL: @fneg_x_vec_undef1(
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; CHECK-NEXT: ret <2 x float> [[A:%.*]]
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;
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%t1 = fneg <2 x float> %a
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%ret = fsub nsz <2 x float> <float 0.0, float undef>, %t1
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ret <2 x float> %ret
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}
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define <2 x float> @fsub_0_0_x_vec_undef2(<2 x float> %a) {
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; CHECK-LABEL: @fsub_0_0_x_vec_undef2(
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; CHECK-NEXT: ret <2 x float> [[A:%.*]]
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;
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%t1 = fsub <2 x float> zeroinitializer, %a
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%ret = fsub nsz <2 x float> <float undef, float -0.0>, %t1
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ret <2 x float> %ret
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}
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; fadd nsz X, 0 ==> X
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define <2 x float> @fadd_zero_nsz_vec(<2 x float> %x) {
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; CHECK-LABEL: @fadd_zero_nsz_vec(
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; CHECK-NEXT: ret <2 x float> [[X:%.*]]
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;
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%r = fadd nsz <2 x float> %x, zeroinitializer
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ret <2 x float> %r
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}
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define <2 x float> @fadd_zero_nsz_vec_undef(<2 x float> %x) {
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; CHECK-LABEL: @fadd_zero_nsz_vec_undef(
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; CHECK-NEXT: ret <2 x float> [[X:%.*]]
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;
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%r = fadd nsz <2 x float> %x, <float 0.0, float undef>
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ret <2 x float> %r
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}
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define float @nofold_fadd_x_0(float %a) {
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; CHECK-LABEL: @nofold_fadd_x_0(
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; CHECK-NEXT: [[NO_ZERO1:%.*]] = fadd ninf float [[A:%.*]], 0.000000e+00
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; CHECK-NEXT: [[NO_ZERO2:%.*]] = fadd nnan float [[A]], 0.000000e+00
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; CHECK-NEXT: [[NO_ZERO:%.*]] = fadd float [[NO_ZERO1]], [[NO_ZERO2]]
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; CHECK-NEXT: ret float [[NO_ZERO]]
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;
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; Dont fold
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%no_zero1 = fadd ninf float %a, 0.0
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%no_zero2 = fadd nnan float %a, 0.0
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%no_zero = fadd float %no_zero1, %no_zero2
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ret float %no_zero
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}
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define float @fold_fadd_nsz_x_0(float %a) {
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; CHECK-LABEL: @fold_fadd_nsz_x_0(
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; CHECK-NEXT: ret float [[A:%.*]]
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;
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%add = fadd nsz float %a, 0.0
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ret float %add
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}
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define float @fold_fadd_cannot_be_neg0_nsz_src_x_0(float %a, float %b) {
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; CHECK-LABEL: @fold_fadd_cannot_be_neg0_nsz_src_x_0(
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; CHECK-NEXT: [[NSZ:%.*]] = fmul nsz float [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: ret float [[NSZ]]
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;
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%nsz = fmul nsz float %a, %b
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%add = fadd float %nsz, 0.0
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ret float %add
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}
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define float @fold_fadd_cannot_be_neg0_fabs_src_x_0(float %a) {
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; CHECK-LABEL: @fold_fadd_cannot_be_neg0_fabs_src_x_0(
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; CHECK-NEXT: [[FABS:%.*]] = call float @llvm.fabs.f32(float [[A:%.*]])
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; CHECK-NEXT: ret float [[FABS]]
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;
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%fabs = call float @llvm.fabs.f32(float %a)
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%add = fadd float %fabs, 0.0
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ret float %add
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}
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define float @fold_fadd_cannot_be_neg0_sqrt_nsz_src_x_0(float %a, float %b) {
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; CHECK-LABEL: @fold_fadd_cannot_be_neg0_sqrt_nsz_src_x_0(
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; CHECK-NEXT: [[NSZ:%.*]] = fmul nsz float [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[SQRT:%.*]] = call float @llvm.sqrt.f32(float [[NSZ]])
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; CHECK-NEXT: ret float [[SQRT]]
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;
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%nsz = fmul nsz float %a, %b
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%sqrt = call float @llvm.sqrt.f32(float %nsz)
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%add = fadd float %sqrt, 0.0
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ret float %add
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}
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define float @fold_fadd_cannot_be_neg0_canonicalize_nsz_src_x_0(float %a, float %b) {
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; CHECK-LABEL: @fold_fadd_cannot_be_neg0_canonicalize_nsz_src_x_0(
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; CHECK-NEXT: [[NSZ:%.*]] = fmul nsz float [[A:%.*]], [[B:%.*]]
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; CHECK-NEXT: [[CANON:%.*]] = call float @llvm.canonicalize.f32(float [[NSZ]])
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; CHECK-NEXT: ret float [[CANON]]
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;
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%nsz = fmul nsz float %a, %b
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%canon = call float @llvm.canonicalize.f32(float %nsz)
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%add = fadd float %canon, 0.0
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ret float %add
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}
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; fdiv nsz nnan 0, X ==> 0
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; 0 / X -> 0
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define double @fdiv_zero_by_x(double %x) {
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; CHECK-LABEL: @fdiv_zero_by_x(
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; CHECK-NEXT: ret double 0.000000e+00
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;
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%r = fdiv nnan nsz double 0.0, %x
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ret double %r
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}
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define <2 x double> @fdiv_zero_by_x_vec_undef(<2 x double> %x) {
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; CHECK-LABEL: @fdiv_zero_by_x_vec_undef(
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; CHECK-NEXT: ret <2 x double> zeroinitializer
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;
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%r = fdiv nnan nsz <2 x double> <double 0.0, double undef>, %x
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ret <2 x double> %r
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}
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; 0 % X -> 0
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; nsz is not necessary - frem result always has the sign of the dividend
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define double @frem_zero_by_x(double %x) {
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; CHECK-LABEL: @frem_zero_by_x(
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; CHECK-NEXT: ret double 0.000000e+00
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;
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%r = frem nnan double 0.0, %x
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ret double %r
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}
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define <2 x double> @frem_poszero_by_x_vec_undef(<2 x double> %x) {
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; CHECK-LABEL: @frem_poszero_by_x_vec_undef(
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; CHECK-NEXT: ret <2 x double> zeroinitializer
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;
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%r = frem nnan <2 x double> <double 0.0, double undef>, %x
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ret <2 x double> %r
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}
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; -0 % X -> -0
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; nsz is not necessary - frem result always has the sign of the dividend
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define double @frem_negzero_by_x(double %x) {
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; CHECK-LABEL: @frem_negzero_by_x(
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; CHECK-NEXT: ret double -0.000000e+00
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;
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%r = frem nnan double -0.0, %x
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ret double %r
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}
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define <2 x double> @frem_negzero_by_x_vec_undef(<2 x double> %x) {
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; CHECK-LABEL: @frem_negzero_by_x_vec_undef(
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; CHECK-NEXT: ret <2 x double> <double -0.000000e+00, double -0.000000e+00>
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;
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%r = frem nnan <2 x double> <double undef, double -0.0>, %x
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ret <2 x double> %r
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}
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define float @fdiv_self(float %f) {
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; CHECK-LABEL: @fdiv_self(
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; CHECK-NEXT: ret float 1.000000e+00
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;
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%div = fdiv nnan float %f, %f
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ret float %div
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}
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define float @fdiv_self_invalid(float %f) {
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; CHECK-LABEL: @fdiv_self_invalid(
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; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[F:%.*]], [[F]]
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; CHECK-NEXT: ret float [[DIV]]
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;
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%div = fdiv float %f, %f
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ret float %div
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}
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define float @fdiv_neg1(float %f) {
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; CHECK-LABEL: @fdiv_neg1(
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; CHECK-NEXT: ret float -1.000000e+00
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;
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%neg = fsub fast float -0.000000e+00, %f
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%div = fdiv nnan float %neg, %f
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ret float %div
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}
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define float @fdiv_neg2(float %f) {
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; CHECK-LABEL: @fdiv_neg2(
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; CHECK-NEXT: ret float -1.000000e+00
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;
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%neg = fsub fast float 0.000000e+00, %f
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%div = fdiv nnan float %neg, %f
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ret float %div
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}
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define float @fdiv_neg_invalid(float %f) {
|
|
; CHECK-LABEL: @fdiv_neg_invalid(
|
|
; CHECK-NEXT: [[NEG:%.*]] = fsub fast float -0.000000e+00, [[F:%.*]]
|
|
; CHECK-NEXT: [[DIV:%.*]] = fdiv float [[NEG]], [[F]]
|
|
; CHECK-NEXT: ret float [[DIV]]
|
|
;
|
|
%neg = fsub fast float -0.000000e+00, %f
|
|
%div = fdiv float %neg, %f
|
|
ret float %div
|
|
}
|
|
|
|
define float @fdiv_neg_swapped1(float %f) {
|
|
; CHECK-LABEL: @fdiv_neg_swapped1(
|
|
; CHECK-NEXT: ret float -1.000000e+00
|
|
;
|
|
%neg = fsub float -0.000000e+00, %f
|
|
%div = fdiv nnan float %f, %neg
|
|
ret float %div
|
|
}
|
|
|
|
define float @fdiv_neg_swapped2(float %f) {
|
|
; CHECK-LABEL: @fdiv_neg_swapped2(
|
|
; CHECK-NEXT: ret float -1.000000e+00
|
|
;
|
|
%neg = fsub float 0.000000e+00, %f
|
|
%div = fdiv nnan float %f, %neg
|
|
ret float %div
|
|
}
|
|
|
|
define <2 x float> @fdiv_neg_vec_undef_elt(<2 x float> %f) {
|
|
; CHECK-LABEL: @fdiv_neg_vec_undef_elt(
|
|
; CHECK-NEXT: ret <2 x float> <float -1.000000e+00, float -1.000000e+00>
|
|
;
|
|
%neg = fsub <2 x float> <float 0.0, float undef>, %f
|
|
%div = fdiv nnan <2 x float> %f, %neg
|
|
ret <2 x float> %div
|
|
}
|
|
|
|
; PR21126: http://llvm.org/bugs/show_bug.cgi?id=21126
|
|
; With loose math, sqrt(X) * sqrt(X) is just X.
|
|
|
|
declare double @llvm.sqrt.f64(double)
|
|
|
|
define double @sqrt_squared(double %f) {
|
|
; CHECK-LABEL: @sqrt_squared(
|
|
; CHECK-NEXT: ret double [[F:%.*]]
|
|
;
|
|
%sqrt = call double @llvm.sqrt.f64(double %f)
|
|
%mul = fmul reassoc nnan nsz double %sqrt, %sqrt
|
|
ret double %mul
|
|
}
|
|
|
|
; Negative tests for the above transform: we need all 3 of those flags.
|
|
|
|
define double @sqrt_squared_not_fast_enough1(double %f) {
|
|
; CHECK-LABEL: @sqrt_squared_not_fast_enough1(
|
|
; CHECK-NEXT: [[SQRT:%.*]] = call double @llvm.sqrt.f64(double [[F:%.*]])
|
|
; CHECK-NEXT: [[MUL:%.*]] = fmul nnan nsz double [[SQRT]], [[SQRT]]
|
|
; CHECK-NEXT: ret double [[MUL]]
|
|
;
|
|
%sqrt = call double @llvm.sqrt.f64(double %f)
|
|
%mul = fmul nnan nsz double %sqrt, %sqrt
|
|
ret double %mul
|
|
}
|
|
|
|
define double @sqrt_squared_not_fast_enough2(double %f) {
|
|
; CHECK-LABEL: @sqrt_squared_not_fast_enough2(
|
|
; CHECK-NEXT: [[SQRT:%.*]] = call double @llvm.sqrt.f64(double [[F:%.*]])
|
|
; CHECK-NEXT: [[MUL:%.*]] = fmul reassoc nnan double [[SQRT]], [[SQRT]]
|
|
; CHECK-NEXT: ret double [[MUL]]
|
|
;
|
|
%sqrt = call double @llvm.sqrt.f64(double %f)
|
|
%mul = fmul reassoc nnan double %sqrt, %sqrt
|
|
ret double %mul
|
|
}
|
|
|
|
define double @sqrt_squared_not_fast_enough3(double %f) {
|
|
; CHECK-LABEL: @sqrt_squared_not_fast_enough3(
|
|
; CHECK-NEXT: [[SQRT:%.*]] = call double @llvm.sqrt.f64(double [[F:%.*]])
|
|
; CHECK-NEXT: [[MUL:%.*]] = fmul reassoc nsz double [[SQRT]], [[SQRT]]
|
|
; CHECK-NEXT: ret double [[MUL]]
|
|
;
|
|
%sqrt = call double @llvm.sqrt.f64(double %f)
|
|
%mul = fmul reassoc nsz double %sqrt, %sqrt
|
|
ret double %mul
|
|
}
|
|
|
|
declare float @llvm.fabs.f32(float)
|
|
declare float @llvm.sqrt.f32(float)
|
|
declare float @llvm.canonicalize.f32(float)
|