derek.holloway
7502bf64a4
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53 lines
2.2 KiB
LLVM
53 lines
2.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
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; RUN: llc -mtriple=riscv64 -mattr=+d,+m < %s | FileCheck %s
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; What the original PR (#169460) tried to solve can only be revealed when a specific
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; set of FMA DAG combiner patterns were skipped due to hitting some recursion limits.
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; And this test is written in a way to hit that limit.
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define double @fnmadd_non_trivial(ptr %p0, ptr %p1, ptr %dst, double %mul425) {
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; CHECK-LABEL: fnmadd_non_trivial:
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; CHECK: # %bb.0:
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; CHECK-NEXT: li a3, -2047
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; CHECK-NEXT: slli a3, a3, 51
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; CHECK-NEXT: fmv.d.x fa5, a3
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; CHECK-NEXT: lui a3, 8201
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; CHECK-NEXT: slli a3, a3, 37
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; CHECK-NEXT: fmv.d.x fa4, a3
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; CHECK-NEXT: li a3, -1025
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; CHECK-NEXT: slli a3, a3, 52
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; CHECK-NEXT: fmv.d.x fa3, a3
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; CHECK-NEXT: lui a3, %hi(.LCPI0_0)
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; CHECK-NEXT: fmv.d.x fa2, zero
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; CHECK-NEXT: ld a3, %lo(.LCPI0_0)(a3)
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; CHECK-NEXT: fnmsub.d fa1, fa0, fa4, fa5
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; CHECK-NEXT: fmadd.d fa4, fa0, fa4, fa5
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; CHECK-NEXT: fmul.d fa5, fa0, fa5
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; CHECK-NEXT: fmadd.d fa1, fa1, fa2, fa3
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; CHECK-NEXT: fmadd.d fa4, fa4, fa2, fa3
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; CHECK-NEXT: sd a3, 0(a2)
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; CHECK-NEXT: fsd fa5, 0(a0)
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; CHECK-NEXT: fnmadd.d fa5, fa1, fa2, fa0
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; CHECK-NEXT: fnmadd.d fa0, fa0, fa2, fa4
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; CHECK-NEXT: fsd fa5, 0(a1)
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; CHECK-NEXT: ret
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store double 0x3FEE666666666666, ptr %dst, align 8
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%mul413 = fmul double %mul425, -3.000000e+00
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store double %mul413, ptr %p0, align 8
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%mul428 = fmul contract double %mul425, 4.500000e+00
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%add429 = fadd nsz contract double %mul428, 3.000000e+00
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%mul430 = fmul contract double %add429, 0.000000e+00
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%sub432 = fadd nsz contract double %mul430, 1.000000e+00
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%mul433 = fmul contract double %sub432, 0.000000e+00
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%1 = fsub nsz contract double %mul433, %mul425
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store double %1, ptr %p1, align 8
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%mul441 = fmul contract double %mul425, 0.000000e+00
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%add443 = fsub double 0.000000e+00, %mul425
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%mul446 = fmul contract double %add443, 4.500000e+00
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%add447 = fadd nsz contract double %mul446, 3.000000e+00
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%mul448 = fmul contract double %add447, 0.000000e+00
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%sub450 = fadd nsz contract double %mul448, 1.000000e+00
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%2 = fsub nsz contract double %sub450, %mul441
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ret double %2
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}
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