diff options
Diffstat (limited to 'test/CodeGen/SystemZ')
-rw-r--r-- | test/CodeGen/SystemZ/prefetch-01.ll | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/test/CodeGen/SystemZ/prefetch-01.ll b/test/CodeGen/SystemZ/prefetch-01.ll new file mode 100644 index 0000000..bb7fea9 --- /dev/null +++ b/test/CodeGen/SystemZ/prefetch-01.ll @@ -0,0 +1,87 @@ +; 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 +} |