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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
45 lines
1.8 KiB
LLVM
45 lines
1.8 KiB
LLVM
; RUN: llc -march=hexagon -disable-machine-licm -hwloop-spec-preheader=1 < %s | FileCheck %s
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; CHECK: loop0
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target triple = "hexagon"
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define i32 @foo(i32 %x, i32 %n, i32* nocapture %A, i32* nocapture %B) #0 {
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entry:
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%cmp = icmp sgt i32 %x, 0
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br i1 %cmp, label %for.cond.preheader, label %return
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for.cond.preheader: ; preds = %entry
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%cmp16 = icmp sgt i32 %n, 0
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br i1 %cmp16, label %for.body.preheader, label %return
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for.body.preheader: ; preds = %for.cond.preheader
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br label %for.body
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for.body: ; preds = %for.body.preheader, %for.body
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%arrayidx.phi = phi i32* [ %arrayidx.inc, %for.body ], [ %B, %for.body.preheader ]
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%arrayidx2.phi = phi i32* [ %arrayidx2.inc, %for.body ], [ %A, %for.body.preheader ]
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%i.07 = phi i32 [ %inc, %for.body ], [ 0, %for.body.preheader ]
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%0 = load i32, i32* %arrayidx.phi, align 4, !tbaa !0
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%1 = load i32, i32* %arrayidx2.phi, align 4, !tbaa !0
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%add = add nsw i32 %1, %0
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store i32 %add, i32* %arrayidx2.phi, align 4, !tbaa !0
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%inc = add nsw i32 %i.07, 1
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%exitcond = icmp eq i32 %inc, %n
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%arrayidx.inc = getelementptr i32, i32* %arrayidx.phi, i32 1
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%arrayidx2.inc = getelementptr i32, i32* %arrayidx2.phi, i32 1
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br i1 %exitcond, label %return.loopexit, label %for.body
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return.loopexit: ; preds = %for.body
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br label %return
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return: ; preds = %return.loopexit, %for.cond.preheader, %entry
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%retval.0 = phi i32 [ 2, %entry ], [ 0, %for.cond.preheader ], [ 0, %return.loopexit ]
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ret i32 %retval.0
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}
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!0 = !{!"int", !1}
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!1 = !{!"omnipotent char", !2}
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!2 = !{!"Simple C/C++ TBAA"}
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attributes #0 = { nounwind "target-cpu"="hexagonv60" "target-features"="-hvx" }
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