61510b51c3
This reverts commit 9c319d5bb40785c969d2af76535ca62448dfafa7. Some issues were discovered with the bootstrap builds, which seem like they were caused by this commit. I'm reverting to investigate.
36 lines
1.3 KiB
LLVM
36 lines
1.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 5
|
|
; RUN: llc -mtriple=aarch64-unknown-linux-gnu < %s | FileCheck %s
|
|
|
|
; FIXME: Currently, we avoid narrowing this v4i32 load, in the
|
|
; hopes of being able to fold the shift, despite it requiring stack
|
|
; storage + loads. Ideally, we should narrow here and load the i32
|
|
; directly from the variable offset e.g:
|
|
;
|
|
; add x8, x0, x1, lsl #4
|
|
; and x9, x2, #0x3
|
|
; ldr w0, [x8, x9, lsl #2]
|
|
;
|
|
; The AArch64TargetLowering::shouldReduceLoadWidth heuristic should
|
|
; probably be updated to choose load-narrowing instead of folding the
|
|
; lsl in larger vector cases.
|
|
;
|
|
define i32 @narrow_load_v4_i32_single_ele_variable_idx(ptr %ptr, i64 %off, i32 %ele) {
|
|
; CHECK-LABEL: narrow_load_v4_i32_single_ele_variable_idx:
|
|
; CHECK: // %bb.0: // %entry
|
|
; CHECK-NEXT: sub sp, sp, #16
|
|
; CHECK-NEXT: .cfi_def_cfa_offset 16
|
|
; CHECK-NEXT: ldr q0, [x0, x1, lsl #4]
|
|
; CHECK-NEXT: mov x8, sp
|
|
; CHECK-NEXT: // kill: def $w2 killed $w2 def $x2
|
|
; CHECK-NEXT: bfi x8, x2, #2, #2
|
|
; CHECK-NEXT: str q0, [sp]
|
|
; CHECK-NEXT: ldr w0, [x8]
|
|
; CHECK-NEXT: add sp, sp, #16
|
|
; CHECK-NEXT: ret
|
|
entry:
|
|
%idx = getelementptr inbounds <4 x i32>, ptr %ptr, i64 %off
|
|
%x = load <4 x i32>, ptr %idx, align 8
|
|
%res = extractelement <4 x i32> %x, i32 %ele
|
|
ret i32 %res
|
|
}
|