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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
722 B
LLVM
28 lines
722 B
LLVM
; RUN: llc -march=hexagon -verify-machineinstrs < %s | FileCheck %s
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; CHECK: memw
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; Check that the testcase compiles without errors.
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target triple = "hexagon"
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; Function Attrs: nounwind
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define void @fred() #0 {
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entry:
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br label %for.cond
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for.cond: ; preds = %entry
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%0 = load i32, i32* undef, align 4
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%mul = mul nsw i32 2, %0
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%cmp = icmp slt i32 undef, %mul
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br i1 %cmp, label %for.body, label %for.end13
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for.body: ; preds = %for.cond
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unreachable
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for.end13: ; preds = %for.cond
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ret void
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}
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attributes #0 = { nounwind "target-cpu"="hexagonv60" "target-features"="+hvx,+hvx-length64b" }
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