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; Test data prefetching.
;
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
declare void @llvm.prefetch(i8*, i32, i32, i32)
@g = global [4096 x i8] zeroinitializer
; Check that instruction read prefetches are ignored.
define void @f1(i8 *%ptr) {
; CHECK-LABEL: f1:
; CHECK-NOT: %r2
; CHECK: br %r14
call void @llvm.prefetch(i8 *%ptr, i32 0, i32 0, i32 0)
ret void
}
; Check that instruction write prefetches are ignored.
define void @f2(i8 *%ptr) {
; CHECK-LABEL: f2:
; CHECK-NOT: %r2
; CHECK: br %r14
call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 0)
ret void
}
; Check data read prefetches.
define void @f3(i8 *%ptr) {
; CHECK-LABEL: f3:
; CHECK: pfd 1, 0(%r2)
; CHECK: br %r14
call void @llvm.prefetch(i8 *%ptr, i32 0, i32 0, i32 1)
ret void
}
; Check data write prefetches.
define void @f4(i8 *%ptr) {
; CHECK-LABEL: f4:
; CHECK: pfd 2, 0(%r2)
; CHECK: br %r14
call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
ret void
}
; Check an address at the negative end of the range.
define void @f5(i8 *%base, i64 %index) {
; CHECK-LABEL: f5:
; CHECK: pfd 2, -524288({{%r2,%r3|%r3,%r2}})
; CHECK: br %r14
%add = add i64 %index, -524288
%ptr = getelementptr i8 *%base, i64 %add
call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
ret void
}
; Check an address at the positive end of the range.
define void @f6(i8 *%base, i64 %index) {
; CHECK-LABEL: f6:
; CHECK: pfd 2, 524287({{%r2,%r3|%r3,%r2}})
; CHECK: br %r14
%add = add i64 %index, 524287
%ptr = getelementptr i8 *%base, i64 %add
call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
ret void
}
; Check that the next address up still compiles.
define void @f7(i8 *%base, i64 %index) {
; CHECK-LABEL: f7:
; CHECK: 524288
; CHECK: pfd 2,
; CHECK: br %r14
%add = add i64 %index, 524288
%ptr = getelementptr i8 *%base, i64 %add
call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
ret void
}
; Check pc-relative prefetches.
define void @f8() {
; CHECK-LABEL: f8:
; CHECK: pfdrl 2, g
; CHECK: br %r14
%ptr = getelementptr [4096 x i8] *@g, i64 0, i64 0
call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
ret void
}
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