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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
43 lines
2.0 KiB
LLVM
43 lines
2.0 KiB
LLVM
;RUN: llc -O2 -hexagon-emit-lut-text=true < %s | FileCheck --check-prefix=TEXT %s
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;If the look up table is used by more than one function, we should ignore the
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;flag and place it the rodata.
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target datalayout = "e-m:e-p:32:32:32-a:0-n16:32-i64:64:64-i32:32:32-i16:16:16-i1:8:8-f32:32:32-f64:64:64-v32:32:32-v64:64:64-v512:512:512-v1024:1024:1024-v2048:2048:2048"
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target triple = "hexagon-unknown--elf"
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;TEXT: .text
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;TEXT: .section{{.*}}.rodata
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;TEXT: .Lswitch.table:
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;TEXT-NEXT: .word
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@switch.table = private unnamed_addr constant [9 x i32] [i32 9, i32 20, i32 14, i32 22, i32 12, i32 5, i32 98, i32 8, i32 11]
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; Function Attrs: norecurse nounwind readnone
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define i32 @foo(i32 %x) local_unnamed_addr #0 {
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entry:
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%0 = icmp ult i32 %x, 9
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br i1 %0, label %switch.lookup, label %return
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switch.lookup: ; preds = %entry
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%switch.gep = getelementptr inbounds [9 x i32], [9 x i32]* @switch.table, i32 0, i32 %x
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%switch.load = load i32, i32* %switch.gep, align 4
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ret i32 %switch.load
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return: ; preds = %entry
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ret i32 19
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}
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define i32 @goo(i32 %x) local_unnamed_addr #0 {
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entry:
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%0 = icmp ult i32 %x, 9
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br i1 %0, label %switch.lookup, label %return
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switch.lookup: ; preds = %entry
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%switch.gep = getelementptr inbounds [9 x i32], [9 x i32]* @switch.table, i32 0, i32 %x
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%switch.load = load i32, i32* %switch.gep, align 4
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ret i32 %switch.load
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return: ; preds = %entry
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ret i32 19
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}
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attributes #0 = { norecurse nounwind readnone "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="hexagonv60" "target-features"="-hvx,-long-calls" "unsafe-fp-math"="false" "use-soft-float"="false" }
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