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clang-p2996/llvm/test/CodeGen/WebAssembly/simd-load-promote-wide.ll
Thomas Lively fec4749200 [WebAssembly] Lower v2f32 to v2f64 extending loads with promote_low 
Previously extra wide v4f32 to v4f64 extending loads would be legalized to v2f32
to v2f64 extending loads, which would then be scalarized by legalization. (v2f32
to v2f64 extending loads not produced by legalization were already being emitted
correctly.) Instead, mark v2f32 to v2f64 extending loads as legal and explicitly
lower them using promote_low. This regresses the addressing modes supported for
the extloads not produced by legalization, but that's a fine trade off for now.

Differential Revision: https://reviews.llvm.org/D108496
2021-09-01 10:27:42 -07:00

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; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
; RUN: llc < %s -verify-machineinstrs -mattr=+simd128 | FileCheck %s
; Test wide load+promote patterns, which after combines and legalization are
; represented differently than 128-bit load+promote patterns.
target triple = "wasm32-unknown-unknown"
define <4 x double> @load_promote_v2f64(<4 x float>* %p) {
; CHECK-LABEL: load_promote_v2f64:
; CHECK: .functype load_promote_v2f64 (i32, i32) -> ()
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 8
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 16
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 0
; CHECK-NEXT: # fallthrough-return
%e = load <4 x float>, <4 x float>* %p
%v = fpext <4 x float> %e to <4 x double>
ret <4 x double> %v
}
define <4 x double> @load_promote_v2f64_with_folded_offset(<4 x float>* %p) {
; CHECK-LABEL: load_promote_v2f64_with_folded_offset:
; CHECK: .functype load_promote_v2f64_with_folded_offset (i32, i32) -> ()
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 24
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 16
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 16
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 0
; CHECK-NEXT: # fallthrough-return
%q = ptrtoint <4 x float>* %p to i32
%r = add nuw i32 %q, 16
%s = inttoptr i32 %r to <4 x float>*
%e = load <4 x float>, <4 x float>* %s
%v = fpext <4 x float> %e to <4 x double>
ret <4 x double> %v
}
define <4 x double> @load_promote_v2f64_with_folded_gep_offset(<4 x float>* %p) {
; CHECK-LABEL: load_promote_v2f64_with_folded_gep_offset:
; CHECK: .functype load_promote_v2f64_with_folded_gep_offset (i32, i32) -> ()
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 24
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 16
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 16
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 0
; CHECK-NEXT: # fallthrough-return
%s = getelementptr inbounds <4 x float>, <4 x float>* %p, i32 1
%e = load <4 x float>, <4 x float>* %s
%v = fpext <4 x float> %e to <4 x double>
ret <4 x double> %v
}
define <4 x double> @load_promote_v2f64_with_unfolded_gep_negative_offset(<4 x float>* %p) {
; CHECK-LABEL: load_promote_v2f64_with_unfolded_gep_negative_offset:
; CHECK: .functype load_promote_v2f64_with_unfolded_gep_negative_offset (i32, i32) -> ()
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const -16
; CHECK-NEXT: i32.add
; CHECK-NEXT: local.tee 1
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 0
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 8
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 16
; CHECK-NEXT: # fallthrough-return
%s = getelementptr inbounds <4 x float>, <4 x float>* %p, i32 -1
%e = load <4 x float>, <4 x float>* %s
%v = fpext <4 x float> %e to <4 x double>
ret <4 x double> %v
}
define <4 x double> @load_promote_v2f64_with_unfolded_offset(<4 x float>* %p) {
; CHECK-LABEL: load_promote_v2f64_with_unfolded_offset:
; CHECK: .functype load_promote_v2f64_with_unfolded_offset (i32, i32) -> ()
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 24
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 16
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 16
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 0
; CHECK-NEXT: # fallthrough-return
%q = ptrtoint <4 x float>* %p to i32
%r = add nsw i32 %q, 16
%s = inttoptr i32 %r to <4 x float>*
%e = load <4 x float>, <4 x float>* %s
%v = fpext <4 x float> %e to <4 x double>
ret <4 x double> %v
}
define <4 x double> @load_promote_v2f64_with_unfolded_gep_offset(<4 x float>* %p) {
; CHECK-LABEL: load_promote_v2f64_with_unfolded_gep_offset:
; CHECK: .functype load_promote_v2f64_with_unfolded_gep_offset (i32, i32) -> ()
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 24
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 16
; CHECK-NEXT: local.get 0
; CHECK-NEXT: local.get 1
; CHECK-NEXT: i32.const 16
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 0
; CHECK-NEXT: # fallthrough-return
%s = getelementptr <4 x float>, <4 x float>* %p, i32 1
%e = load <4 x float>, <4 x float>* %s
%v = fpext <4 x float> %e to <4 x double>
ret <4 x double> %v
}
define <4 x double> @load_promote_v2f64_from_numeric_address() {
; CHECK-LABEL: load_promote_v2f64_from_numeric_address:
; CHECK: .functype load_promote_v2f64_from_numeric_address (i32) -> ()
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get 0
; CHECK-NEXT: i32.const 40
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 16
; CHECK-NEXT: local.get 0
; CHECK-NEXT: i32.const 32
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 0
; CHECK-NEXT: # fallthrough-return
%s = inttoptr i32 32 to <4 x float>*
%e = load <4 x float>, <4 x float>* %s
%v = fpext <4 x float> %e to <4 x double>
ret <4 x double> %v
}
@gv_v4f32 = global <4 x float> <float 42., float 42., float 42., float 42.>
define <4 x double> @load_promote_v2f64_from_global_address() {
; CHECK-LABEL: load_promote_v2f64_from_global_address:
; CHECK: .functype load_promote_v2f64_from_global_address (i32) -> ()
; CHECK-NEXT: # %bb.0:
; CHECK-NEXT: local.get 0
; CHECK-NEXT: i32.const gv_v4f32
; CHECK-NEXT: i32.const 8
; CHECK-NEXT: i32.add
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 16
; CHECK-NEXT: local.get 0
; CHECK-NEXT: i32.const gv_v4f32
; CHECK-NEXT: v128.load64_zero 0
; CHECK-NEXT: f64x2.promote_low_f32x4
; CHECK-NEXT: v128.store 0
; CHECK-NEXT: # fallthrough-return
%e = load <4 x float>, <4 x float>* @gv_v4f32
%v = fpext <4 x float> %e to <4 x double>
ret <4 x double> %v
}
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