1 ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py 2 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=-slow-unaligned-mem-16 | FileCheck %s --check-prefix=FAST 3 ; RUN: llc < %s -mtriple=x86_64-unknown-unknown -mattr=+slow-unaligned-mem-16 | FileCheck %s --check-prefix=SLOW 4 5 ; Verify that the DAGCombiner is creating unaligned 16-byte loads and stores 6 ; if and only if those are fast. 7 8 define void @merge_const_vec_store(i64* %ptr) { 9 ; FAST-LABEL: merge_const_vec_store: 10 ; FAST: # BB#0: 11 ; FAST-NEXT: xorps %xmm0, %xmm0 12 ; FAST-NEXT: movups %xmm0, (%rdi) 13 ; FAST-NEXT: retq 14 ; 15 ; SLOW-LABEL: merge_const_vec_store: 16 ; SLOW: # BB#0: 17 ; SLOW-NEXT: movq $0, (%rdi) 18 ; SLOW-NEXT: movq $0, 8(%rdi) 19 ; SLOW-NEXT: retq 20 21 %idx0 = getelementptr i64, i64* %ptr, i64 0 22 %idx1 = getelementptr i64, i64* %ptr, i64 1 23 24 store i64 0, i64* %idx0, align 8 25 store i64 0, i64* %idx1, align 8 26 ret void 27 } 28 29 30 define void @merge_vec_element_store(<4 x double> %v, double* %ptr) { 31 ; FAST-LABEL: merge_vec_element_store: 32 ; FAST: # BB#0: 33 ; FAST-NEXT: movups %xmm0, (%rdi) 34 ; FAST-NEXT: retq 35 ; 36 ; SLOW-LABEL: merge_vec_element_store: 37 ; SLOW: # BB#0: 38 ; SLOW-NEXT: movlpd %xmm0, (%rdi) 39 ; SLOW-NEXT: movhpd %xmm0, 8(%rdi) 40 ; SLOW-NEXT: retq 41 42 %vecext0 = extractelement <4 x double> %v, i32 0 43 %vecext1 = extractelement <4 x double> %v, i32 1 44 45 %idx0 = getelementptr double, double* %ptr, i64 0 46 %idx1 = getelementptr double, double* %ptr, i64 1 47 48 store double %vecext0, double* %idx0, align 8 49 store double %vecext1, double* %idx1, align 8 50 ret void 51 } 52 53 54 ;; TODO: FAST *should* be: 55 ;; movups (%rdi), %xmm0 56 ;; movups %xmm0, 40(%rdi) 57 ;; ..but is not currently. See the UseAA FIXME in DAGCombiner.cpp 58 ;; visitSTORE. 59 60 define void @merge_vec_load_and_stores(i64 *%ptr) { 61 ; FAST-LABEL: merge_vec_load_and_stores: 62 ; FAST: # BB#0: 63 ; FAST-NEXT: movq (%rdi), %rax 64 ; FAST-NEXT: movq 8(%rdi), %rcx 65 ; FAST-NEXT: movq %rax, 40(%rdi) 66 ; FAST-NEXT: movq %rcx, 48(%rdi) 67 ; FAST-NEXT: retq 68 ; 69 ; SLOW-LABEL: merge_vec_load_and_stores: 70 ; SLOW: # BB#0: 71 ; SLOW-NEXT: movq (%rdi), %rax 72 ; SLOW-NEXT: movq 8(%rdi), %rcx 73 ; SLOW-NEXT: movq %rax, 40(%rdi) 74 ; SLOW-NEXT: movq %rcx, 48(%rdi) 75 ; SLOW-NEXT: retq 76 77 %idx0 = getelementptr i64, i64* %ptr, i64 0 78 %idx1 = getelementptr i64, i64* %ptr, i64 1 79 80 %ld0 = load i64, i64* %idx0, align 4 81 %ld1 = load i64, i64* %idx1, align 4 82 83 %idx4 = getelementptr i64, i64* %ptr, i64 5 84 %idx5 = getelementptr i64, i64* %ptr, i64 6 85 86 store i64 %ld0, i64* %idx4, align 4 87 store i64 %ld1, i64* %idx5, align 4 88 ret void 89 } 90 91
