034a27e688
This patch recognizes f16 immediates as legal and adds the necessary
patterns. This allows the fadda folding introduced in 05d424d165
to be applied to the f16 cases.
Differential Revision: https://reviews.llvm.org/D129989
83 lines
2.7 KiB
LLVM
83 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=aarch64-none-linux-gnu -mattr=+neon,+fullfp16 < %s -o -| FileCheck %s
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declare half @llvm.fabs.f16(half)
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declare float @llvm.fabs.f32(float)
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declare double @llvm.fabs.f64(double)
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declare fp128 @llvm.fabs.f128(fp128)
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; Check if INFINITY for _Float16 is materialized
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define i32 @replace_isinf_call_f16(half %x) {
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; CHECK-LABEL: replace_isinf_call_f16:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #31744
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; CHECK-NEXT: fabs h0, h0
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; CHECK-NEXT: fmov h1, w8
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; CHECK-NEXT: fcmp h0, h1
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; CHECK-NEXT: cset w0, eq
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; CHECK-NEXT: ret
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%abs = tail call half @llvm.fabs.f16(half %x)
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%cmpinf = fcmp oeq half %abs, 0xH7C00
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%ret = zext i1 %cmpinf to i32
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ret i32 %ret
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}
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; Check if INFINITY for float is materialized
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define i32 @replace_isinf_call_f32(float %x) {
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; CHECK-LABEL: replace_isinf_call_f32:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov w8, #2139095040
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; CHECK-NEXT: fabs s0, s0
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; CHECK-NEXT: fmov s1, w8
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; CHECK-NEXT: fcmp s0, s1
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; CHECK-NEXT: cset w0, eq
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; CHECK-NEXT: ret
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%abs = tail call float @llvm.fabs.f32(float %x)
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%cmpinf = fcmp oeq float %abs, 0x7FF0000000000000
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%ret = zext i1 %cmpinf to i32
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ret i32 %ret
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}
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; Check if INFINITY for double is materialized
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define i32 @replace_isinf_call_f64(double %x) {
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; CHECK-LABEL: replace_isinf_call_f64:
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; CHECK: // %bb.0:
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; CHECK-NEXT: mov x8, #9218868437227405312
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; CHECK-NEXT: fabs d0, d0
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; CHECK-NEXT: fmov d1, x8
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; CHECK-NEXT: fcmp d0, d1
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; CHECK-NEXT: cset w0, eq
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; CHECK-NEXT: ret
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%abs = tail call double @llvm.fabs.f64(double %x)
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%cmpinf = fcmp oeq double %abs, 0x7FF0000000000000
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%ret = zext i1 %cmpinf to i32
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ret i32 %ret
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}
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; For long double it still requires loading the constant.
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define i32 @replace_isinf_call_f128(fp128 %x) {
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; CHECK-LABEL: replace_isinf_call_f128:
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; CHECK: // %bb.0:
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; CHECK-NEXT: sub sp, sp, #32
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; CHECK-NEXT: .cfi_def_cfa_offset 32
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; CHECK-NEXT: str x30, [sp, #16] // 8-byte Folded Spill
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; CHECK-NEXT: .cfi_offset w30, -16
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; CHECK-NEXT: str q0, [sp]
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; CHECK-NEXT: ldrb w8, [sp, #15]
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; CHECK-NEXT: and w8, w8, #0x7f
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; CHECK-NEXT: strb w8, [sp, #15]
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; CHECK-NEXT: adrp x8, .LCPI3_0
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; CHECK-NEXT: ldr q0, [sp]
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; CHECK-NEXT: ldr q1, [x8, :lo12:.LCPI3_0]
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; CHECK-NEXT: bl __eqtf2
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; CHECK-NEXT: ldr x30, [sp, #16] // 8-byte Folded Reload
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; CHECK-NEXT: cmp w0, #0
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; CHECK-NEXT: cset w0, eq
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; CHECK-NEXT: add sp, sp, #32
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; CHECK-NEXT: ret
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%abs = tail call fp128 @llvm.fabs.f128(fp128 %x)
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%cmpinf = fcmp oeq fp128 %abs, 0xL00000000000000007FFF000000000000
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%ret = zext i1 %cmpinf to i32
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ret i32 %ret
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}
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