11571a005a
Based on top of #157211. `FNEG` and `FABS` must preserve signalling NaNs, meaning they should not convert to f32 to perform the operation. Instead legalize to `XOR` and `AND`. Fixes almost all of #104915
105 lines
6.3 KiB
LLVM
105 lines
6.3 KiB
LLVM
; Same as `bfloat.ll`, but for `fneg`, `fabs`, `copysign` and `fma`.
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; Can be merged back into `bfloat.ll` once they have the same platform coverage.
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; Once all targets are fixed, the `CHECK-*` prefixes should all be merged into a single `CHECK` prefix and the `BAD-*` prefixes should be removed.
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; RUN: %if aarch64-registered-target %{ llc %s -o - -mtriple=aarch64-apple-darwin | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,CHECK-FMA %}
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; RUN: %if aarch64-registered-target %{ llc %s -o - -mtriple=aarch64-pc-windows-msvc | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,CHECK-FMA %}
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; RUN: %if aarch64-registered-target %{ llc %s -o - -mtriple=aarch64-unknown-linux-gnu | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,CHECK-FMA %}
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; RUN: %if aarch64-registered-target %{ llc %s -o - -mtriple=arm64ec-pc-windows-msvc | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,CHECK-FMA %}
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; RUN: %if amdgpu-registered-target %{ llc %s -o - -mtriple=amdgcn-amd-amdhsa | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,CHECK-FMA %}
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; RUN: %if arc-registered-target %{ llc %s -o - -mtriple=arc-elf | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if arm-registered-target %{ llc %s -o - -mtriple=arm-unknown-linux-gnueabi | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if arm-registered-target %{ llc %s -o - -mtriple=thumbv7em-none-eabi | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if avr-registered-target %{ llc %s -o - -mtriple=avr-none | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; FIXME: BPF has a compiler error
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; RUN: %if csky-registered-target %{ llc %s -o - -mtriple=csky-unknown-linux-gnuabiv2 | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; FIXME: hard float csky crashes
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; FIXME: directx has a compiler error
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; FIXME: hexagon crashes
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; RUN: %if lanai-registered-target %{ llc %s -o - -mtriple=lanai-unknown-unknown | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if loongarch-registered-target %{ llc %s -o - -mtriple=loongarch32-unknown-linux-gnu | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if loongarch-registered-target %{ llc %s -o - -mtriple=loongarch64-unknown-linux-gnu | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if loongarch-registered-target %{ llc %s -o - -mtriple=loongarch64-unknown-linux-gnu -mattr=+f | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if m68k-registered-target %{ llc %s -o - -mtriple=m68k-unknown-linux-gnu | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; FIXME: mips crashes
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; RUN: %if msp430-registered-target %{ llc %s -o - -mtriple=msp430-none-elf | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if nvptx-registered-target %{ llc %s -o - -mtriple=nvptx64-nvidia-cuda | FileCheck %s --check-prefixes=NOCRASH %}
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; FIXME: powerpc crashes
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; RUN: %if riscv-registered-target %{ llc %s -o - -mtriple=riscv32-unknown-linux-gnu | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if riscv-registered-target %{ llc %s -o - -mtriple=riscv64-unknown-linux-gnu | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; FIXME: sparc crashes
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; FIXME: spirv crashes
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; FIXME: s390x crashes
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; FIXME: ve crashes
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; FIXME: wasm crashes
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; RUN: %if x86-registered-target %{ llc %s -o - -mtriple=i686-unknown-linux-gnu | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if x86-registered-target %{ llc %s -o - -mtriple=x86_64-pc-windows-msvc | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if x86-registered-target %{ llc %s -o - -mtriple=x86_64-unknown-linux-gnu | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if xcore-registered-target %{ llc %s -o - -mtriple=xcore-unknown-unknown | FileCheck %s --check-prefixes=ALL,CHECK-COPYSIGN,BAD-FMA %}
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; RUN: %if xtensa-registered-target %{ llc %s -o - -mtriple=xtensa-none-elf | FileCheck %s --check-prefixes=ALL,BAD-COPYSIGN,CHECK-FMA %}
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; Note that arm64ec labels are quoted, hence the `{{"?}}:`.
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; Codegen tests don't work the same for graphics targets. Add a dummy directive
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; for filecheck, just make sure we don't crash.
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; NOCRASH: {{.*}}
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; fneg, fabs and copysign all need to not quieten signalling NaNs, so should not call any conversion functions which do.
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; These tests won't catch cases where the everything is done using native instructions instead of builtins.
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define void @test_fneg(ptr %p1, ptr %p2) #0 {
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; ALL-LABEL: test_fneg{{"?}}:
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; ALL-NEG-NOT: __extend
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; ALL-NEG-NOT: __trunc
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; ALL-NEG-NOT: __gnu
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; ALL-NEG-NOT: __aeabi
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%v = load bfloat, ptr %p1
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%res = fneg bfloat %v
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store bfloat %res, ptr %p2
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ret void
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}
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define void @test_fabs(ptr %p1, ptr %p2) {
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; ALL-LABEL: test_fabs{{"?}}:
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; ALL-ABS-NOT: __extend
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; ALL-ABS-NOT: __trunc
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; ALL-ABS-NOT: __gnu
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; ALL-ABS-NOT: __aeabi
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%a = load bfloat, ptr %p1
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%r = call bfloat @llvm.fabs.f16(bfloat %a)
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store bfloat %r, ptr %p2
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ret void
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}
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define void @test_copysign(ptr %p1, ptr %p2, ptr %p3) {
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; ALL-LABEL: test_copysign{{"?}}:
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; CHECK-COPYSIGN-NOT: __extend
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; CHECK-COPYSIGN-NOT: __trunc
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; CHECK-COPYSIGN-NOT: __gnu
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; CHECK-COPYSIGN-NOT: __aeabi
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; BAD-COPYSIGN: __truncsfbf2
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%a = load bfloat, ptr %p1
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%b = load bfloat, ptr %p2
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%r = call bfloat @llvm.copysign.f16(bfloat %a, bfloat %b)
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store bfloat %r, ptr %p3
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ret void
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}
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; There is no floating-point type LLVM supports that is large enough to promote bfloat FMA to
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; without causing double rounding issues. This checks for libcalls to f32/f64 fma and truncating
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; f32/f64 to bf16. See https://github.com/llvm/llvm-project/issues/131531
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define void @test_fma(ptr %p1, ptr %p2, ptr %p3, ptr %p4) {
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; ALL-LABEL: test_fma{{"?}}:
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; CHECK-FMA-NOT: {{\bfmaf?\b}}
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; CHECK-FMA-NOT: __truncsfbf2
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; CHECK-FMA-NOT: __truncdfbf2
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; BAD-FMA: {{__truncsfbf2|\bfmaf?\b}}
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%a = load bfloat, ptr %p1
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%b = load bfloat, ptr %p2
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%c = load bfloat, ptr %p3
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%r = call bfloat @llvm.fma.f16(bfloat %a, bfloat %b, bfloat %c)
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store bfloat %r, ptr %p4
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ret void
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}
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