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16ca26b4d0
The SplitF64 node is used on RV32D to convert an f64 directly to a pair of i32 (necessary as bitcasting to i64 isn't legal). When performed on a ConstantFP, this will result in a FP load from the constant pool followed by a store to the stack and two integer loads from the stack (necessary as there is no way to directly move between f64 FPRs and i32 GPRs on RV32D). It's always cheaper to just materialise integers for the lo and hi parts of the FP constant, so do that instead. llvm-svn: 357341
62 lines
1.7 KiB
LLVM
62 lines
1.7 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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define double @test(double %a) nounwind {
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; RV32IFD-LABEL: test:
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; RV32IFD: # %bb.0:
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; RV32IFD-NEXT: ret
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ret double %a
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}
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; This previously failed complaining of multiple vreg defs due to an ABI
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; lowering issue.
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define i32 @main() nounwind {
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; RV32IFD-LABEL: main:
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; RV32IFD: # %bb.0: # %entry
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; RV32IFD-NEXT: addi sp, sp, -16
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; RV32IFD-NEXT: sw ra, 12(sp)
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; RV32IFD-NEXT: mv a0, zero
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; RV32IFD-NEXT: lui a1, 262144
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; RV32IFD-NEXT: call test
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; RV32IFD-NEXT: sw a0, 0(sp)
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; RV32IFD-NEXT: sw a1, 4(sp)
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; RV32IFD-NEXT: fld ft0, 0(sp)
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; RV32IFD-NEXT: lui a0, %hi(.LCPI1_0)
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; RV32IFD-NEXT: addi a0, a0, %lo(.LCPI1_0)
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; RV32IFD-NEXT: fld ft1, 0(a0)
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; RV32IFD-NEXT: flt.d a0, ft0, ft1
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; RV32IFD-NEXT: bnez a0, .LBB1_3
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; RV32IFD-NEXT: # %bb.1: # %entry
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; RV32IFD-NEXT: lui a0, %hi(.LCPI1_1)
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; RV32IFD-NEXT: addi a0, a0, %lo(.LCPI1_1)
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; RV32IFD-NEXT: fld ft1, 0(a0)
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; RV32IFD-NEXT: flt.d a0, ft1, ft0
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; RV32IFD-NEXT: xori a0, a0, 1
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; RV32IFD-NEXT: beqz a0, .LBB1_3
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; RV32IFD-NEXT: # %bb.2: # %if.end
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; RV32IFD-NEXT: mv a0, zero
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; RV32IFD-NEXT: call exit
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; RV32IFD-NEXT: .LBB1_3: # %if.then
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; RV32IFD-NEXT: call abort
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entry:
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%call = call double @test(double 2.000000e+00)
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%cmp = fcmp olt double %call, 2.400000e-01
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%cmp2 = fcmp ogt double %call, 2.600000e-01
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%or.cond = or i1 %cmp, %cmp2
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br i1 %or.cond, label %if.then, label %if.end
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if.then:
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call void @abort()
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unreachable
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if.end:
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call void @exit(i32 0)
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unreachable
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}
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declare void @abort()
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declare void @exit(i32)
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