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262321d1ff
This patch lets the llvm tools handle the new HVX target features that
are added by frontend (clang). The target-features are of the form
"hvx-length64b" for 64 Byte HVX mode, "hvx-length128b" for 128 Byte mode HVX.
"hvx-double" is an alias to "hvx-length128b" and is soon will be deprecated.
The hvx version target feature is upgated form "+hvx" to "+hvxv{version_number}.
Eg: "+hvxv62"
For the correct HVX code generation, the user must use the following
target features.
For 64B mode: "+hvxv62" "+hvx-length64b"
For 128B mode: "+hvxv62" "+hvx-length128b"
Clang picks a default length if none is specified. If for some reason,
no hvx-length is specified to llvm, the compilation will bail out.
There is a corresponding clang patch.
Differential Revision: https://reviews.llvm.org/D38851
llvm-svn: 316101
28 lines
1.1 KiB
LLVM
28 lines
1.1 KiB
LLVM
; RUN: llc -march=hexagon -hexagon-loop-prefetch < %s | FileCheck %s
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; CHECK: dcfetch
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target triple = "hexagon"
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define void @copy(i32* nocapture %d, i32* nocapture readonly %s, i32 %n) local_unnamed_addr #0 {
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entry:
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%tobool2 = icmp eq i32 %n, 0
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br i1 %tobool2, label %while.end, label %while.body
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while.body: ; preds = %entry, %while.body
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%n.addr.05 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
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%s.addr.04 = phi i32* [ %incdec.ptr, %while.body ], [ %s, %entry ]
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%d.addr.03 = phi i32* [ %incdec.ptr1, %while.body ], [ %d, %entry ]
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%dec = add i32 %n.addr.05, -1
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%incdec.ptr = getelementptr inbounds i32, i32* %s.addr.04, i32 1
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%0 = load i32, i32* %s.addr.04, align 4
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%incdec.ptr1 = getelementptr inbounds i32, i32* %d.addr.03, i32 1
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store i32 %0, i32* %d.addr.03, align 4
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%tobool = icmp eq i32 %dec, 0
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br i1 %tobool, label %while.end, label %while.body
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while.end: ; preds = %while.body, %entry
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ret void
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}
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attributes #0 = { norecurse nounwind "target-cpu"="hexagonv60" "target-features"="-hvx" }
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