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Optimize memmove and memset into the LLVM builtins. Note that these

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only show up in code from front-ends besides llvm-gcc, like clang.



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@60287 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Eli Friedman
2008-11-30 08:32:11 +00:00
parent 91db5271d2
commit d83ae7d698
3 changed files with 81 additions and 4 deletions
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test/Transforms/SimplifyLibCalls/memmove.ll
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; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | grep {llvm.memmove}
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
target triple = "i686-pc-linux-gnu"
define i8* @test(i8* %a, i8* %b, i32 %x) {
entry:
%call = call i8* @memmove(i8* %a, i8* %b, i32 %x )
ret i8* %call
}
declare i8* @memmove(i8*,i8*,i32)
test/Transforms/SimplifyLibCalls/memset.ll
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; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | grep {llvm.memset}
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:32:32"
target triple = "i686-pc-linux-gnu"
define i8* @test(i8* %a, i32 %b, i32 %x) {
entry:
%call = call i8* @memset(i8* %a, i32 %b, i32 %x )
ret i8* %call
}
declare i8* @memset(i8*,i32,i32)