41454ab256
For large integers (for example, magic numbers generated by TargetLowering::BuildSDIV when dividing by constant), we may need about 4~8 instructions to build them. In the same time, it just takes two instructions to load constants (with extra cycles to access memory), so it may be profitable to put these integers into constant pool. Reviewed By: asb, craig.topper Differential Revision: https://reviews.llvm.org/D114950
51 lines
1.6 KiB
LLVM
51 lines
1.6 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=riscv32 -mattr=+d -verify-machineinstrs < %s \
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; RUN: | FileCheck -check-prefix=RV32IFD %s
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; RUN: llc -mtriple=riscv64 -mattr=+d -verify-machineinstrs < %s \
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; RUN: | FileCheck -check-prefix=RV64IFD %s
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define double @double_imm() nounwind {
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; RV32IFD-LABEL: double_imm:
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; RV32IFD: # %bb.0:
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; RV32IFD-NEXT: lui a0, 345155
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; RV32IFD-NEXT: addi a0, a0, -744
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; RV32IFD-NEXT: lui a1, 262290
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; RV32IFD-NEXT: addi a1, a1, 507
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; RV32IFD-NEXT: ret
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;
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; RV64IFD-LABEL: double_imm:
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; RV64IFD: # %bb.0:
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; RV64IFD-NEXT: lui a0, %hi(.LCPI0_0)
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; RV64IFD-NEXT: ld a0, %lo(.LCPI0_0)(a0)
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; RV64IFD-NEXT: ret
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ret double 3.1415926535897931159979634685441851615905761718750
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}
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define double @double_imm_op(double %a) nounwind {
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; RV32IFD-LABEL: double_imm_op:
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; RV32IFD: # %bb.0:
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; RV32IFD-NEXT: addi sp, sp, -16
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; RV32IFD-NEXT: sw a0, 8(sp)
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; RV32IFD-NEXT: sw a1, 12(sp)
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; RV32IFD-NEXT: fld ft0, 8(sp)
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; RV32IFD-NEXT: lui a0, %hi(.LCPI1_0)
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; RV32IFD-NEXT: fld ft1, %lo(.LCPI1_0)(a0)
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; RV32IFD-NEXT: fadd.d ft0, ft0, ft1
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; RV32IFD-NEXT: fsd ft0, 8(sp)
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; RV32IFD-NEXT: lw a0, 8(sp)
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; RV32IFD-NEXT: lw a1, 12(sp)
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; RV32IFD-NEXT: addi sp, sp, 16
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; RV32IFD-NEXT: ret
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;
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; RV64IFD-LABEL: double_imm_op:
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; RV64IFD: # %bb.0:
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; RV64IFD-NEXT: lui a1, %hi(.LCPI1_0)
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; RV64IFD-NEXT: fld ft0, %lo(.LCPI1_0)(a1)
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; RV64IFD-NEXT: fmv.d.x ft1, a0
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; RV64IFD-NEXT: fadd.d ft0, ft1, ft0
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; RV64IFD-NEXT: fmv.x.d a0, ft0
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; RV64IFD-NEXT: ret
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%1 = fadd double %a, 1.0
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ret double %1
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}
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