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TargetLibraryInfo: Disable memcpy and memset on R600

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There are no implementations of these for R600.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@205455 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Tom Stellard 2014-04-02 19:53:29 +00:00
parent bc07242d9b
commit adb852ddf3
2 changed files with 64 additions and 1 deletions
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11
lib/Target/TargetLibraryInfo.cpp
View File

@ -378,7 +378,16 @@ static void initialize(TargetLibraryInfo &TLI, const Triple &T,
llvm_unreachable("TargetLibraryInfo function names must be sorted");
}
#endif // !NDEBUG
// There are no library implementations of mempcy and memset for r600 and
// these can be difficult to lower in the backend.
if (T.getArch() == Triple::r600) {
TLI.setUnavailable(LibFunc::memcpy);
TLI.setUnavailable(LibFunc::memset);
TLI.setUnavailable(LibFunc::memset_pattern16);
return;
}
// memset_pattern16 is only available on iOS 3.0 and Mac OS X 10.5 and later.
if (T.isMacOSX()) {
if (T.isMacOSXVersionLT(10, 5))

54
test/CodeGen/R600/loop-idiom.ll Normal file
View File

@ -0,0 +1,54 @@
; RUN: opt -basicaa -loop-idiom -S < %s -march=r600 -mcpu=redwood | FileCheck --check-prefix=R600 --check-prefix=FUNC %s
; RUN: opt -basicaa -loop-idiom -S < %s -march=r600 -mcpu=SI | FileCheck --check-prefix=SI --check-prefix=FUNC %s
target datalayout = "e-p:32:32-p1:64:64-p2:64:64-p3:32:32-p4:32:32-p5:64:64-i64:64-v16:16-v24:32-v32:32-v48:64-v96:128-v192:256-v256:256-v512:512-v1024:1024-v2048:2048-n32:64"
target triple = "r600--"
; Make sure loop-idiom doesn't create memcpy or memset. There are no library
; implementations of these for R600.
; FUNC: @no_memcpy
; R600-NOT: @llvm.memcpy
; SI-NOT: @llvm.memcpy
define void @no_memcpy(i8 addrspace(3)* %in, i32 %size) {
entry:
%dest = alloca i8, i32 32
br label %for.body
for.body:
%0 = phi i32 [0, %entry], [%4, %for.body]
%1 = getelementptr i8 addrspace(3)* %in, i32 %0
%2 = getelementptr i8* %dest, i32 %0
%3 = load i8 addrspace(3)* %1
store i8 %3, i8* %2
%4 = add i32 %0, 1
%5 = icmp eq i32 %4, %size
br i1 %5, label %for.end, label %for.body
for.end:
ret void
}
; FUNC: @no_memset
; R600-NOT: @llvm.memset
; R600-NOT: @memset_pattern16
; SI-NOT: @llvm.memset
; SI-NOT: @memset_pattern16
define void @no_memset(i32 %size) {
entry:
%dest = alloca i8, i32 32
br label %for.body
for.body:
%0 = phi i32 [0, %entry], [%2, %for.body]
%1 = getelementptr i8* %dest, i32 %0
store i8 0, i8* %1
%2 = add i32 %0, 1
%3 = icmp eq i32 %2, %size
br i1 %3, label %for.end, label %for.body
for.end:
ret void
}