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[RISCV] Add test cases for missed opportunities to use fcvt.*.w(u) instructions on RV64 when input is known to be extended from i8/i16.

This commit is contained in:
Craig Topper 2021-01-24 11:23:25 -08:00
parent e841bd5f33
commit 60ebf6408e
3 changed files with 192 additions and 0 deletions
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80
llvm/test/CodeGen/RISCV/double-convert.ll
View File

@ -267,3 +267,83 @@ define double @fmv_d_x(i64 %a, i64 %b) nounwind {
%3 = fadd double %1, %2
ret double %3
}
define double @fcvt_d_w_i8(i8 signext %a) nounwind {
; RV32IFD-LABEL: fcvt_d_w_i8:
; RV32IFD: # %bb.0:
; RV32IFD-NEXT: addi sp, sp, -16
; RV32IFD-NEXT: fcvt.d.w ft0, a0
; RV32IFD-NEXT: fsd ft0, 8(sp)
; RV32IFD-NEXT: lw a0, 8(sp)
; RV32IFD-NEXT: lw a1, 12(sp)
; RV32IFD-NEXT: addi sp, sp, 16
; RV32IFD-NEXT: ret
;
; RV64IFD-LABEL: fcvt_d_w_i8:
; RV64IFD: # %bb.0:
; RV64IFD-NEXT: fcvt.d.l ft0, a0
; RV64IFD-NEXT: fmv.x.d a0, ft0
; RV64IFD-NEXT: ret
%1 = sitofp i8 %a to double
ret double %1
}
define double @fcvt_d_wu_i8(i8 zeroext %a) nounwind {
; RV32IFD-LABEL: fcvt_d_wu_i8:
; RV32IFD: # %bb.0:
; RV32IFD-NEXT: addi sp, sp, -16
; RV32IFD-NEXT: fcvt.d.wu ft0, a0
; RV32IFD-NEXT: fsd ft0, 8(sp)
; RV32IFD-NEXT: lw a0, 8(sp)
; RV32IFD-NEXT: lw a1, 12(sp)
; RV32IFD-NEXT: addi sp, sp, 16
; RV32IFD-NEXT: ret
;
; RV64IFD-LABEL: fcvt_d_wu_i8:
; RV64IFD: # %bb.0:
; RV64IFD-NEXT: fcvt.d.lu ft0, a0
; RV64IFD-NEXT: fmv.x.d a0, ft0
; RV64IFD-NEXT: ret
%1 = uitofp i8 %a to double
ret double %1
}
define double @fcvt_d_w_i16(i16 signext %a) nounwind {
; RV32IFD-LABEL: fcvt_d_w_i16:
; RV32IFD: # %bb.0:
; RV32IFD-NEXT: addi sp, sp, -16
; RV32IFD-NEXT: fcvt.d.w ft0, a0
; RV32IFD-NEXT: fsd ft0, 8(sp)
; RV32IFD-NEXT: lw a0, 8(sp)
; RV32IFD-NEXT: lw a1, 12(sp)
; RV32IFD-NEXT: addi sp, sp, 16
; RV32IFD-NEXT: ret
;
; RV64IFD-LABEL: fcvt_d_w_i16:
; RV64IFD: # %bb.0:
; RV64IFD-NEXT: fcvt.d.l ft0, a0
; RV64IFD-NEXT: fmv.x.d a0, ft0
; RV64IFD-NEXT: ret
%1 = sitofp i16 %a to double
ret double %1
}
define double @fcvt_d_wu_i16(i16 zeroext %a) nounwind {
; RV32IFD-LABEL: fcvt_d_wu_i16:
; RV32IFD: # %bb.0:
; RV32IFD-NEXT: addi sp, sp, -16
; RV32IFD-NEXT: fcvt.d.wu ft0, a0
; RV32IFD-NEXT: fsd ft0, 8(sp)
; RV32IFD-NEXT: lw a0, 8(sp)
; RV32IFD-NEXT: lw a1, 12(sp)
; RV32IFD-NEXT: addi sp, sp, 16
; RV32IFD-NEXT: ret
;
; RV64IFD-LABEL: fcvt_d_wu_i16:
; RV64IFD: # %bb.0:
; RV64IFD-NEXT: fcvt.d.lu ft0, a0
; RV64IFD-NEXT: fmv.x.d a0, ft0
; RV64IFD-NEXT: ret
%1 = uitofp i16 %a to double
ret double %1
}

64
llvm/test/CodeGen/RISCV/float-convert.ll
View File

@ -192,3 +192,67 @@ define float @fcvt_s_lu(i64 %a) nounwind {
%1 = uitofp i64 %a to float
ret float %1
}
define float @fcvt_s_w_i8(i8 signext %a) nounwind {
; RV32IF-LABEL: fcvt_s_w_i8:
; RV32IF: # %bb.0:
; RV32IF-NEXT: fcvt.s.w ft0, a0
; RV32IF-NEXT: fmv.x.w a0, ft0
; RV32IF-NEXT: ret
;
; RV64IF-LABEL: fcvt_s_w_i8:
; RV64IF: # %bb.0:
; RV64IF-NEXT: fcvt.s.l ft0, a0
; RV64IF-NEXT: fmv.x.w a0, ft0
; RV64IF-NEXT: ret
%1 = sitofp i8 %a to float
ret float %1
}
define float @fcvt_s_wu_i8(i8 zeroext %a) nounwind {
; RV32IF-LABEL: fcvt_s_wu_i8:
; RV32IF: # %bb.0:
; RV32IF-NEXT: fcvt.s.wu ft0, a0
; RV32IF-NEXT: fmv.x.w a0, ft0
; RV32IF-NEXT: ret
;
; RV64IF-LABEL: fcvt_s_wu_i8:
; RV64IF: # %bb.0:
; RV64IF-NEXT: fcvt.s.lu ft0, a0
; RV64IF-NEXT: fmv.x.w a0, ft0
; RV64IF-NEXT: ret
%1 = uitofp i8 %a to float
ret float %1
}
define float @fcvt_s_w_i16(i16 signext %a) nounwind {
; RV32IF-LABEL: fcvt_s_w_i16:
; RV32IF: # %bb.0:
; RV32IF-NEXT: fcvt.s.w ft0, a0
; RV32IF-NEXT: fmv.x.w a0, ft0
; RV32IF-NEXT: ret
;
; RV64IF-LABEL: fcvt_s_w_i16:
; RV64IF: # %bb.0:
; RV64IF-NEXT: fcvt.s.l ft0, a0
; RV64IF-NEXT: fmv.x.w a0, ft0
; RV64IF-NEXT: ret
%1 = sitofp i16 %a to float
ret float %1
}
define float @fcvt_s_wu_i16(i16 zeroext %a) nounwind {
; RV32IF-LABEL: fcvt_s_wu_i16:
; RV32IF: # %bb.0:
; RV32IF-NEXT: fcvt.s.wu ft0, a0
; RV32IF-NEXT: fmv.x.w a0, ft0
; RV32IF-NEXT: ret
;
; RV64IF-LABEL: fcvt_s_wu_i16:
; RV64IF: # %bb.0:
; RV64IF-NEXT: fcvt.s.lu ft0, a0
; RV64IF-NEXT: fmv.x.w a0, ft0
; RV64IF-NEXT: ret
%1 = uitofp i16 %a to float
ret float %1
}

48
llvm/test/CodeGen/RISCV/half-convert.ll
View File

@ -200,6 +200,30 @@ define half @fcvt_h_si(i16 %a) nounwind {
ret half %1
}
define half @fcvt_h_si_signext(i16 signext %a) nounwind {
; RV32IZFH-LABEL: fcvt_h_si_signext:
; RV32IZFH: # %bb.0:
; RV32IZFH-NEXT: fcvt.h.w fa0, a0
; RV32IZFH-NEXT: ret
;
; RV32IDZFH-LABEL: fcvt_h_si_signext:
; RV32IDZFH: # %bb.0:
; RV32IDZFH-NEXT: fcvt.h.w fa0, a0
; RV32IDZFH-NEXT: ret
;
; RV64IZFH-LABEL: fcvt_h_si_signext:
; RV64IZFH: # %bb.0:
; RV64IZFH-NEXT: fcvt.h.l fa0, a0
; RV64IZFH-NEXT: ret
;
; RV64IDZFH-LABEL: fcvt_h_si_signext:
; RV64IDZFH: # %bb.0:
; RV64IDZFH-NEXT: fcvt.h.l fa0, a0
; RV64IDZFH-NEXT: ret
%1 = sitofp i16 %a to half
ret half %1
}
define half @fcvt_h_ui(i16 %a) nounwind {
; RV32IZFH-LABEL: fcvt_h_ui:
; RV32IZFH: # %bb.0:
@ -236,6 +260,30 @@ define half @fcvt_h_ui(i16 %a) nounwind {
ret half %1
}
define half @fcvt_h_ui_zeroext(i16 zeroext %a) nounwind {
; RV32IZFH-LABEL: fcvt_h_ui_zeroext:
; RV32IZFH: # %bb.0:
; RV32IZFH-NEXT: fcvt.h.wu fa0, a0
; RV32IZFH-NEXT: ret
;
; RV32IDZFH-LABEL: fcvt_h_ui_zeroext:
; RV32IDZFH: # %bb.0:
; RV32IDZFH-NEXT: fcvt.h.wu fa0, a0
; RV32IDZFH-NEXT: ret
;
; RV64IZFH-LABEL: fcvt_h_ui_zeroext:
; RV64IZFH: # %bb.0:
; RV64IZFH-NEXT: fcvt.h.lu fa0, a0
; RV64IZFH-NEXT: ret
;
; RV64IDZFH-LABEL: fcvt_h_ui_zeroext:
; RV64IDZFH: # %bb.0:
; RV64IDZFH-NEXT: fcvt.h.lu fa0, a0
; RV64IDZFH-NEXT: ret
%1 = uitofp i16 %a to half
ret half %1
}
define half @fcvt_h_w(i32 %a) nounwind {
; RV32IZFH-LABEL: fcvt_h_w:
; RV32IZFH: # %bb.0: