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Diffstat (limited to 'test/CodeGen/Hexagon/builtin-prefetch-offset.ll')
| -rw-r--r-- | test/CodeGen/Hexagon/builtin-prefetch-offset.ll | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/test/CodeGen/Hexagon/builtin-prefetch-offset.ll b/test/CodeGen/Hexagon/builtin-prefetch-offset.ll new file mode 100644 index 0000000000000..b542308abd3e5 --- /dev/null +++ b/test/CodeGen/Hexagon/builtin-prefetch-offset.ll @@ -0,0 +1,28 @@ +; RUN: llc -march=hexagon < %s | FileCheck %s +; Check for the immediate offset. It must be a multiple of 8. +; CHECK: dcfetch({{.*}}+{{ *}}#8) +; In 6.2 (which supports v4+ only), we generate indexed dcfetch in all cases +; (unlike in 6.1, which supported v2, where dcfetch did not allow an immediate +; offset). +; For expression %2, where the offset is +9, the offset on dcfetch should be +; a multiple of 8, and the offset of 0 is most likely (although not the only +; possible one). Check for #0 anyways, if the test fails with a false +; positive, the second check can be eliminated, or rewritten, and in the +; meantime it can help catch real problems. +; CHECK: dcfetch({{.*}}+{{ *}}#0) +target datalayout = "e-p:32:32:32-i64:64:64-i32:32:32-i16:16:16-i1:32:32-f64:64:64-f32:32:32-v64:64:64-v32:32:32-a0:0-n16:32" +target triple = "hexagon" + +define void @foo(i8* %addr) nounwind { +entry: + %addr.addr = alloca i8*, align 4 + store i8* %addr, i8** %addr.addr, align 4 + %0 = load i8*, i8** %addr.addr, align 4 + %1 = getelementptr i8, i8* %0, i32 8 + call void @llvm.prefetch(i8* %1, i32 0, i32 3, i32 1) + %2 = getelementptr i8, i8* %0, i32 9 + call void @llvm.prefetch(i8* %2, i32 0, i32 3, i32 1) + ret void +} + +declare void @llvm.prefetch(i8* nocapture, i32, i32, i32) nounwind |