llvm/test/Transforms/MemCpyOpt/smaller.ll
Sean Silva cf989e53a0 [PM] Port MemCpyOpt to the new PM.
The need for all these Lookup* functions is just because of calls to
getAnalysis inside methods (i.e. not at the top level) of the
runOnFunction method. They should be straightforward to clean up when
the old PM is gone.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@272615 91177308-0d34-0410-b5e6-96231b3b80d8
2016-06-14 02:44:55 +00:00

30 lines
1.3 KiB
LLVM

; RUN: opt -memcpyopt -S < %s | FileCheck %s
; RUN: opt -passes=memcpyopt -S < %s | FileCheck %s
; rdar://8875553
; Memcpyopt shouldn't optimize the second memcpy using the first
; because the first has a smaller size.
; CHECK: call void @llvm.memcpy.p0i8.p0i8.i32(i8* %tmp, i8* getelementptr inbounds (%struct.s, %struct.s* @cell, i32 0, i32 0, i32 0), i32 16, i32 4, i1 false)
target datalayout = "e-p:32:32:32"
%struct.s = type { [11 x i8], i32 }
@.str = private constant [11 x i8] c"0123456789\00"
@cell = external global %struct.s
declare void @check(%struct.s* byval %p) nounwind
declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind
define void @foo() nounwind {
entry:
%agg.tmp = alloca %struct.s, align 4
store i32 99, i32* getelementptr inbounds (%struct.s, %struct.s* @cell, i32 0, i32 1), align 4
call void @llvm.memcpy.p0i8.p0i8.i32(i8* getelementptr inbounds (%struct.s, %struct.s* @cell, i32 0, i32 0, i32 0), i8* getelementptr inbounds ([11 x i8], [11 x i8]* @.str, i32 0, i32 0), i32 11, i32 1, i1 false)
%tmp = getelementptr inbounds %struct.s, %struct.s* %agg.tmp, i32 0, i32 0, i32 0
call void @llvm.memcpy.p0i8.p0i8.i32(i8* %tmp, i8* getelementptr inbounds (%struct.s, %struct.s* @cell, i32 0, i32 0, i32 0), i32 16, i32 4, i1 false)
call void @check(%struct.s* byval %agg.tmp)
ret void
}