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{RISCV] Test coverage for improved lowering assuming vscale is pow-of…
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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py | ||
; RUN: llc -mtriple=riscv64 -mattr=+v,+m -verify-machineinstrs < %s | FileCheck %s | ||
; RUN: llc -mtriple=riscv64 -mattr=+Zve64x,+m -verify-machineinstrs < %s | FileCheck %s | ||
declare i64 @llvm.vscale.i64() | ||
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define i64 @vscale_lshr(i64 %TC) { | ||
; CHECK-LABEL: vscale_lshr: | ||
; CHECK: # %bb.0: | ||
; CHECK-NEXT: csrr a1, vlenb | ||
; CHECK-NEXT: srli a1, a1, 6 | ||
; CHECK-NEXT: remu a0, a0, a1 | ||
; CHECK-NEXT: ret | ||
%vscale = call i64 @llvm.vscale.i64() | ||
%shifted = lshr i64 %vscale, 3 | ||
%urem = urem i64 %TC, %shifted | ||
ret i64 %urem | ||
} | ||
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define i64 @vscale(i64 %TC) { | ||
; CHECK-LABEL: vscale: | ||
; CHECK: # %bb.0: | ||
; CHECK-NEXT: csrr a1, vlenb | ||
; CHECK-NEXT: srli a1, a1, 3 | ||
; CHECK-NEXT: remu a0, a0, a1 | ||
; CHECK-NEXT: ret | ||
%vscale = call i64 @llvm.vscale.i64() | ||
%urem = urem i64 %TC, %vscale | ||
ret i64 %urem | ||
} | ||
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define i64 @vscale_shl(i64 %TC) { | ||
; CHECK-LABEL: vscale_shl: | ||
; CHECK: # %bb.0: | ||
; CHECK-NEXT: csrr a1, vlenb | ||
; CHECK-NEXT: remu a0, a0, a1 | ||
; CHECK-NEXT: ret | ||
%vscale = call i64 @llvm.vscale.i64() | ||
%shifted = shl i64 %vscale, 3 | ||
%urem = urem i64 %TC, %shifted | ||
ret i64 %urem | ||
} | ||
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define i64 @TC_minus_rem(i64 %TC) { | ||
; CHECK-LABEL: TC_minus_rem: | ||
; CHECK: # %bb.0: | ||
; CHECK-NEXT: csrr a1, vlenb | ||
; CHECK-NEXT: srli a1, a1, 3 | ||
; CHECK-NEXT: remu a1, a0, a1 | ||
; CHECK-NEXT: sub a0, a0, a1 | ||
; CHECK-NEXT: ret | ||
%vscale = call i64 @llvm.vscale.i64() | ||
%urem = urem i64 %TC, %vscale | ||
%VTC = sub i64 %TC, %urem | ||
ret i64 %VTC | ||
} | ||
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define i64 @TC_minus_rem_shl(i64 %TC) { | ||
; CHECK-LABEL: TC_minus_rem_shl: | ||
; CHECK: # %bb.0: | ||
; CHECK-NEXT: csrr a1, vlenb | ||
; CHECK-NEXT: remu a1, a0, a1 | ||
; CHECK-NEXT: sub a0, a0, a1 | ||
; CHECK-NEXT: ret | ||
%vscale = call i64 @llvm.vscale.i64() | ||
%shifted = shl i64 %vscale, 3 | ||
%urem = urem i64 %TC, %shifted | ||
%VTC = sub i64 %TC, %urem | ||
ret i64 %VTC | ||
} | ||
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define i64 @con1024_minus_rem() { | ||
; CHECK-LABEL: con1024_minus_rem: | ||
; CHECK: # %bb.0: | ||
; CHECK-NEXT: csrr a0, vlenb | ||
; CHECK-NEXT: srli a0, a0, 3 | ||
; CHECK-NEXT: li a1, 1024 | ||
; CHECK-NEXT: remu a0, a1, a0 | ||
; CHECK-NEXT: sub a0, a1, a0 | ||
; CHECK-NEXT: ret | ||
%vscale = call i64 @llvm.vscale.i64() | ||
%urem = urem i64 1024, %vscale | ||
%VTC = sub i64 1024, %urem | ||
ret i64 %VTC | ||
} | ||
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; Maximum VLEN=64k implies Maximum vscale=1024. | ||
; TODO: This should fold to 2048 | ||
define i64 @con2048_minus_rem() { | ||
; CHECK-LABEL: con2048_minus_rem: | ||
; CHECK: # %bb.0: | ||
; CHECK-NEXT: csrr a0, vlenb | ||
; CHECK-NEXT: srli a0, a0, 3 | ||
; CHECK-NEXT: lui a1, 1 | ||
; CHECK-NEXT: addiw a1, a1, -2048 | ||
; CHECK-NEXT: remu a0, a1, a0 | ||
; CHECK-NEXT: sub a0, a1, a0 | ||
; CHECK-NEXT: ret | ||
%vscale = call i64 @llvm.vscale.i64() | ||
%urem = urem i64 2048, %vscale | ||
%VTC = sub i64 2048, %urem | ||
ret i64 %VTC | ||
} |