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https://github.com/c64scene-ar/llvm-6502.git
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88 lines
2.1 KiB
LLVM
88 lines
2.1 KiB
LLVM
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; Test data prefetching.
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;
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; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
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declare void @llvm.prefetch(i8*, i32, i32, i32)
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@g = global [4096 x i8] zeroinitializer
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; Check that instruction read prefetches are ignored.
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define void @f1(i8 *%ptr) {
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; CHECK-LABEL: f1:
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; CHECK-NOT: %r2
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; CHECK: br %r14
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call void @llvm.prefetch(i8 *%ptr, i32 0, i32 0, i32 0)
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ret void
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}
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; Check that instruction write prefetches are ignored.
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define void @f2(i8 *%ptr) {
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; CHECK-LABEL: f2:
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; CHECK-NOT: %r2
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; CHECK: br %r14
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call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 0)
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ret void
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}
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; Check data read prefetches.
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define void @f3(i8 *%ptr) {
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; CHECK-LABEL: f3:
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; CHECK: pfd 1, 0(%r2)
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; CHECK: br %r14
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call void @llvm.prefetch(i8 *%ptr, i32 0, i32 0, i32 1)
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ret void
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}
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; Check data write prefetches.
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define void @f4(i8 *%ptr) {
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; CHECK-LABEL: f4:
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; CHECK: pfd 2, 0(%r2)
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; CHECK: br %r14
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call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
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ret void
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}
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; Check an address at the negative end of the range.
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define void @f5(i8 *%base, i64 %index) {
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; CHECK-LABEL: f5:
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; CHECK: pfd 2, -524288({{%r2,%r3|%r3,%r2}})
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; CHECK: br %r14
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%add = add i64 %index, -524288
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%ptr = getelementptr i8 *%base, i64 %add
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call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
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ret void
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}
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; Check an address at the positive end of the range.
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define void @f6(i8 *%base, i64 %index) {
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; CHECK-LABEL: f6:
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; CHECK: pfd 2, 524287({{%r2,%r3|%r3,%r2}})
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; CHECK: br %r14
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%add = add i64 %index, 524287
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%ptr = getelementptr i8 *%base, i64 %add
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call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
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ret void
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}
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; Check that the next address up still compiles.
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define void @f7(i8 *%base, i64 %index) {
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; CHECK-LABEL: f7:
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; CHECK: 524288
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; CHECK: pfd 2,
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; CHECK: br %r14
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%add = add i64 %index, 524288
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%ptr = getelementptr i8 *%base, i64 %add
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call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
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ret void
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}
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; Check pc-relative prefetches.
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define void @f8() {
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; CHECK-LABEL: f8:
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; CHECK: pfdrl 2, g
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; CHECK: br %r14
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%ptr = getelementptr [4096 x i8] *@g, i64 0, i64 0
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call void @llvm.prefetch(i8 *%ptr, i32 1, i32 0, i32 1)
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ret void
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}
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