1 ; Test data prefetching. 2 ; 3 ; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s 4 5 declare void @llvm.prefetch(i8*, i32, i32, i32) 6 7 @g = global [4096 x i8] zeroinitializer 8 9 ; Check that instruction read prefetches are ignored. 10 define void @f1(i8 *%ptr) { 11 ; CHECK-LABEL: f1: 12 ; CHECK-NOT: %r2 13 ; CHECK: br %r14 14 call void @llvm.prefetch(i8 *%ptr, i32 0, i32 0, i32 0) 15 ret void 16 } 17 18 ; Check that instruction write prefetches are ignored. 19 define void @f2(i8 *%ptr) { 20 ; CHECK-LABEL: f2: 21 ; CHECK-NOT: %r2 22 ; CHECK: br %r14 23 call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 0) 24 ret void 25 } 26 27 ; Check data read prefetches. 28 define void @f3(i8 *%ptr) { 29 ; CHECK-LABEL: f3: 30 ; CHECK: pfd 1, 0(%r2) 31 ; CHECK: br %r14 32 call void @llvm.prefetch(i8 *%ptr, i32 0, i32 0, i32 1) 33 ret void 34 } 35 36 ; Check data write prefetches. 37 define void @f4(i8 *%ptr) { 38 ; CHECK-LABEL: f4: 39 ; CHECK: pfd 2, 0(%r2) 40 ; CHECK: br %r14 41 call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1) 42 ret void 43 } 44 45 ; Check an address at the negative end of the range. 46 define void @f5(i8 *%base, i64 %index) { 47 ; CHECK-LABEL: f5: 48 ; CHECK: pfd 2, -524288({{%r2,%r3|%r3,%r2}}) 49 ; CHECK: br %r14 50 %add = add i64 %index, -524288 51 %ptr = getelementptr i8 *%base, i64 %add 52 call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1) 53 ret void 54 } 55 56 ; Check an address at the positive end of the range. 57 define void @f6(i8 *%base, i64 %index) { 58 ; CHECK-LABEL: f6: 59 ; CHECK: pfd 2, 524287({{%r2,%r3|%r3,%r2}}) 60 ; CHECK: br %r14 61 %add = add i64 %index, 524287 62 %ptr = getelementptr i8 *%base, i64 %add 63 call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1) 64 ret void 65 } 66 67 ; Check that the next address up still compiles. 68 define void @f7(i8 *%base, i64 %index) { 69 ; CHECK-LABEL: f7: 70 ; CHECK: 524288 71 ; CHECK: pfd 2, 72 ; CHECK: br %r14 73 %add = add i64 %index, 524288 74 %ptr = getelementptr i8 *%base, i64 %add 75 call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1) 76 ret void 77 } 78 79 ; Check pc-relative prefetches. 80 define void @f8() { 81 ; CHECK-LABEL: f8: 82 ; CHECK: pfdrl 2, g 83 ; CHECK: br %r14 84 %ptr = getelementptr [4096 x i8] *@g, i64 0, i64 0 85 call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1) 86 ret void 87 } 88
