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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
46 lines
1.4 KiB
LLVM
46 lines
1.4 KiB
LLVM
; RUN: llc -march=hexagon -verify-machineinstrs < %s | FileCheck %s
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; REQUIRES: asserts
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; Check for some output (as opposed to a crash).
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; CHECK: loop0
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target triple = "hexagon"
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@x = external local_unnamed_addr global [80 x i32], align 8
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; Function Attrs: nounwind
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define void @fred() local_unnamed_addr #0 {
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b0:
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br label %b1
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b1: ; preds = %b20, %b0
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br label %b2
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b2: ; preds = %b2, %b1
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%v3 = phi i32 [ 0, %b1 ], [ %v17, %b2 ]
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%v4 = phi i32 [ 0, %b1 ], [ %v16, %b2 ]
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%v5 = phi i32 [ undef, %b1 ], [ %v18, %b2 ]
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%v6 = load i32, i32* undef, align 8
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%v7 = icmp sgt i32 %v6, undef
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%v8 = select i1 %v7, i32 %v3, i32 %v4
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%v9 = select i1 undef, i32 0, i32 %v8
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%v10 = select i1 undef, i32 undef, i32 %v9
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%v11 = select i1 undef, i32 0, i32 %v10
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%v12 = icmp sgt i32 undef, 0
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%v13 = select i1 %v12, i32 undef, i32 %v11
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%v14 = select i1 false, i32 undef, i32 %v13
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%v15 = select i1 false, i32 undef, i32 %v14
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%v16 = select i1 false, i32 undef, i32 %v15
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%v17 = add nsw i32 %v3, 8
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%v18 = add i32 %v5, -8
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%v19 = icmp eq i32 %v18, 0
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br i1 %v19, label %b20, label %b2
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b20: ; preds = %b2
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%v21 = getelementptr inbounds [80 x i32], [80 x i32]* @x, i32 0, i32 %v16
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store i32 -2000, i32* %v21, align 4
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br label %b1
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}
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attributes #0 = { nounwind "target-cpu"="hexagonv55" "target-features"="-hvx,-long-calls" }
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