; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py ; RUN: llc < %s -mcpu cortex-a53 -mtriple=aarch64-eabi | FileCheck %s --check-prefix=A53 ; PR26827 - Merge stores causes wrong dependency. %struct1 = type { ptr, ptr, i32, i32, i16, i16, ptr, ptr } @gv0 = internal unnamed_addr global i32 0, align 4 @gv1 = internal unnamed_addr global ptr null, align 8 define void @test(ptr %fde, i32 %fd, ptr %func, ptr %arg) uwtable { ;CHECK-LABEL: test ; A53-LABEL: test: ; A53: // %bb.0: // %entry ; A53-NEXT: stp x30, x19, [sp, #-16]! // 16-byte Folded Spill ; A53-NEXT: .cfi_def_cfa_offset 16 ; A53-NEXT: .cfi_offset w19, -8 ; A53-NEXT: .cfi_offset w30, -16 ; A53-NEXT: .cfi_remember_state ; A53-NEXT: movi v0.2d, #0000000000000000 ; A53-NEXT: mov x8, x0 ; A53-NEXT: mov x19, x8 ; A53-NEXT: mov w0, w1 ; A53-NEXT: mov w9, #256 ; A53-NEXT: stp x2, x3, [x8, #32] ; A53-NEXT: mov x2, x8 ; A53-NEXT: str q0, [x19, #16]! ; A53-NEXT: str w1, [x19] ; A53-NEXT: mov w1, #4 ; A53-NEXT: str q0, [x8] ; A53-NEXT: strh w9, [x8, #24] ; A53-NEXT: str wzr, [x8, #20] ; A53-NEXT: bl fcntl ; A53-NEXT: adrp x9, gv0 ; A53-NEXT: add x9, x9, :lo12:gv0 ; A53-NEXT: cmp x19, x9 ; A53-NEXT: b.eq .LBB0_4 ; A53-NEXT: // %bb.1: ; A53-NEXT: ldr w8, [x19] ; A53-NEXT: ldr w9, [x9] ; A53-NEXT: .p2align 4, , 8 ; A53-NEXT: .LBB0_2: // %while.body.i.split.ver.us ; A53-NEXT: // =>This Inner Loop Header: Depth=1 ; A53-NEXT: lsl w9, w9, #1 ; A53-NEXT: cmp w9, w8 ; A53-NEXT: b.le .LBB0_2 ; A53-NEXT: // %bb.3: // %while.end.i ; A53-NEXT: bl foo ; A53-NEXT: adrp x8, gv1 ; A53-NEXT: str x0, [x8, :lo12:gv1] ; A53-NEXT: ldp x30, x19, [sp], #16 // 16-byte Folded Reload ; A53-NEXT: .cfi_def_cfa_offset 0 ; A53-NEXT: .cfi_restore w19 ; A53-NEXT: .cfi_restore w30 ; A53-NEXT: ret ; A53-NEXT: .p2align 4, , 8 ; A53-NEXT: .LBB0_4: // %while.body.i.split ; A53-NEXT: // =>This Inner Loop Header: Depth=1 ; A53-NEXT: .cfi_restore_state ; A53-NEXT: b .LBB0_4 entry: tail call void @llvm.memset.p0.i64(ptr align 8 %fde, i8 0, i64 40, i1 false) %state = getelementptr inbounds %struct1, ptr %fde, i64 0, i32 4 store i16 256, ptr %state, align 8 %fd1 = getelementptr inbounds %struct1, ptr %fde, i64 0, i32 2 store i32 %fd, ptr %fd1, align 8 %force_eof = getelementptr inbounds %struct1, ptr %fde, i64 0, i32 3 store i32 0, ptr %force_eof, align 4 %func2 = getelementptr inbounds %struct1, ptr %fde, i64 0, i32 6 store ptr %func, ptr %func2, align 8 %arg3 = getelementptr inbounds %struct1, ptr %fde, i64 0, i32 7 store ptr %arg, ptr %arg3, align 8 %call = tail call i32 (i32, i32, ...) @fcntl(i32 %fd, i32 4, ptr %fde) #6 %0 = load i32, ptr %fd1, align 8 %cmp.i = icmp slt i32 %0, 0 br i1 %cmp.i, label %if.then.i, label %while.body.i.preheader if.then.i: unreachable while.body.i.preheader: %1 = load i32, ptr @gv0, align 4 %2 = icmp eq ptr %fd1, @gv0 br i1 %2, label %while.body.i.split, label %while.body.i.split.ver.us.preheader while.body.i.split.ver.us.preheader: br label %while.body.i.split.ver.us while.body.i.split.ver.us: %.reg2mem21.0 = phi i32 [ %mul.i.ver.us, %while.body.i.split.ver.us ], [ %1, %while.body.i.split.ver.us.preheader ] %mul.i.ver.us = shl nsw i32 %.reg2mem21.0, 1 %3 = icmp sgt i32 %mul.i.ver.us, %0 br i1 %3, label %while.end.i, label %while.body.i.split.ver.us while.body.i.split: br label %while.body.i.split while.end.i: %call.i = tail call ptr @foo() store ptr %call.i, ptr @gv1, align 8 br label %exit exit: ret void } ; TODO: rev16? define void @rotate16_in_place(ptr %p) { ; A53-LABEL: rotate16_in_place: ; A53: // %bb.0: ; A53-NEXT: ldrb w8, [x0, #1] ; A53-NEXT: ldrb w9, [x0] ; A53-NEXT: strb w8, [x0] ; A53-NEXT: strb w9, [x0, #1] ; A53-NEXT: ret %p1 = getelementptr i8, ptr %p, i64 1 %i0 = load i8, ptr %p, align 1 %i1 = load i8, ptr %p1, align 1 store i8 %i1, ptr %p, align 1 store i8 %i0, ptr %p1, align 1 ret void } ; TODO: rev16? define void @rotate16(ptr %p, ptr %q) { ; A53-LABEL: rotate16: ; A53: // %bb.0: ; A53-NEXT: ldrb w8, [x0, #1] ; A53-NEXT: ldrb w9, [x0] ; A53-NEXT: strb w8, [x1] ; A53-NEXT: strb w9, [x1, #1] ; A53-NEXT: ret %p1 = getelementptr i8, ptr %p, i64 1 %q1 = getelementptr i8, ptr %q, i64 1 %i0 = load i8, ptr %p, align 1 %i1 = load i8, ptr %p1, align 1 store i8 %i1, ptr %q, align 1 store i8 %i0, ptr %q1, align 1 ret void } define void @rotate32_in_place(ptr %p) { ; A53-LABEL: rotate32_in_place: ; A53: // %bb.0: ; A53-NEXT: ldr w8, [x0] ; A53-NEXT: ror w8, w8, #16 ; A53-NEXT: str w8, [x0] ; A53-NEXT: ret %p1 = getelementptr i16, ptr %p, i64 1 %i0 = load i16, ptr %p, align 2 %i1 = load i16, ptr %p1, align 2 store i16 %i1, ptr %p, align 2 store i16 %i0, ptr %p1, align 2 ret void } define void @rotate32(ptr %p) { ; A53-LABEL: rotate32: ; A53: // %bb.0: ; A53-NEXT: ldr w8, [x0] ; A53-NEXT: ror w8, w8, #16 ; A53-NEXT: str w8, [x0, #84] ; A53-NEXT: ret %p1 = getelementptr i16, ptr %p, i64 1 %p42 = getelementptr i16, ptr %p, i64 42 %p43 = getelementptr i16, ptr %p, i64 43 %i0 = load i16, ptr %p, align 2 %i1 = load i16, ptr %p1, align 2 store i16 %i1, ptr %p42, align 2 store i16 %i0, ptr %p43, align 2 ret void } ; Prefer paired memops over rotate. define void @rotate64_in_place(ptr %p) { ; A53-LABEL: rotate64_in_place: ; A53: // %bb.0: ; A53-NEXT: ldp w9, w8, [x0] ; A53-NEXT: stp w8, w9, [x0] ; A53-NEXT: ret %p1 = getelementptr i32, ptr %p, i64 1 %i0 = load i32, ptr %p, align 4 %i1 = load i32, ptr %p1, align 4 store i32 %i1, ptr %p, align 4 store i32 %i0, ptr %p1, align 4 ret void } ; Prefer paired memops over rotate. define void @rotate64(ptr %p) { ; A53-LABEL: rotate64: ; A53: // %bb.0: ; A53-NEXT: ldp w9, w8, [x0] ; A53-NEXT: stp w8, w9, [x0, #8] ; A53-NEXT: ret %p1 = getelementptr i32, ptr %p, i64 1 %p2 = getelementptr i32, ptr %p, i64 2 %p3 = getelementptr i32, ptr %p, i64 3 %i0 = load i32, ptr %p, align 4 %i1 = load i32, ptr %p1, align 4 store i32 %i1, ptr %p2, align 4 store i32 %i0, ptr %p3, align 4 ret void } declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) declare i32 @fcntl(i32, i32, ...) declare noalias ptr @foo()