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llvm-project/llvm/test/Transforms/InstCombine/memcpy-to-load.ll

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Change tests from "opt %s" to "opt < %s" so that opt doesn't see the input filename so that opt doesn't print the input filename in the output so that grep lines in the tests don't unintentionally match strings in the input filename. llvm-svn: 81537
2009-09-12 02:01:28 +08:00
; RUN: opt < %s -instcombine -S | grep {load double}
Turn a memcpy from a double* into a load/store of double instead of a load/store of i64. The later prevents promotion/scalarrepl of the source and dest in many cases. This fixes the 300% performance regression of the byval stuff on stepanov_v1p2. llvm-svn: 45945
2008-01-14 08:28:35 +08:00
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-f80:128:128"
target triple = "i686-apple-darwin8"
define void @foo(double* %X, double* %Y) {
entry:
%"alloca point" = bitcast i32 0 to i32 ; <i32> [#uses=0]
%tmp2 = bitcast double* %X to i8* ; <i8*> [#uses=1]
%tmp13 = bitcast double* %Y to i8* ; <i8*> [#uses=1]
call void @llvm.memcpy.i32( i8* %tmp2, i8* %tmp13, i32 8, i32 1 )
ret void
}
declare void @llvm.memcpy.i32(i8*, i8*, i32, i32) nounwind