04e5bc7dfb
This patch adds support in Clang for the RPRFM instruction, by adding
the following intrinsics:
```
void __pldx_range(unsigned int *access_kind*, unsigned int retention_policy,
signed int length*, unsigned int count, signed int stride,
size_t reuse distance, void const *addr);
void __pld_range(unsigned int access_kind*, unsigned int retention_policy,
uint64_t metadata, void const *addr);
```
The `__ARM_PREFETCH_RANGE` macro can be used to test whether these
intrinsics are implemented. If the RPRFM instruction is not available, this
instruction is a NOP.
This implements the following ACLE proposal:
https://github.com/ARM-software/acle/pull/423
19 lines
934 B
LLVM
19 lines
934 B
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 6
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; RUN: llc -mtriple=aarch64 -mattr=+v8.9a --global-isel=0 < %s | FileCheck %s
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; RUN: llc -mtriple=aarch64 -mattr=+v8.9a --global-isel=1 --global-isel-abort=1 < %s | FileCheck %s
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define void @range_prefetch_metadata_accesses(ptr %a, i64 %metadata) {
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; CHECK-LABEL: range_prefetch_metadata_accesses:
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; CHECK: // %bb.0:
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; CHECK-NEXT: rprfm pldkeep, x1, [x0]
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; CHECK-NEXT: rprfm pstkeep, x1, [x0]
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; CHECK-NEXT: rprfm pldstrm, x1, [x0]
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; CHECK-NEXT: rprfm pststrm, x1, [x0]
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; CHECK-NEXT: ret
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call void @llvm.aarch64.range.prefetch(ptr %a, i32 0, i32 0, i64 %metadata)
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call void @llvm.aarch64.range.prefetch(ptr %a, i32 1, i32 0, i64 %metadata)
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call void @llvm.aarch64.range.prefetch(ptr %a, i32 0, i32 1, i64 %metadata)
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call void @llvm.aarch64.range.prefetch(ptr %a, i32 1, i32 1, i64 %metadata)
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ret void
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}
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