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llvm-mirror/test/Transforms/ScalarRepl/2010-01-18-SelfCopy.ll
Bob Wilson e94d77854f Fix a crash in scalarrepl for memcpy/memmove where the source and destination
are the same.  I had already fixed a similar problem where the source and
destination were different bitcasts derived from the same alloca, but the
previous fix still did not handle the case where both operands are exactly
the same value.  Radar 7552893.

llvm-svn: 93848
2010-01-19 04:32:48 +00:00

19 lines
592 B
LLVM

; RUN: opt < %s -scalarrepl -S | FileCheck %s
; Radar 7552893
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-n8:16:32"
%struct.test = type { [3 x double ] }
define arm_apcscc void @test_memcpy_self() nounwind {
; CHECK: @test_memcpy_self
; CHECK-NOT: alloca
; CHECK: ret void
%1 = alloca %struct.test
%2 = bitcast %struct.test* %1 to i8*
call void @llvm.memcpy.i32(i8* %2, i8* %2, i32 24, i32 4)
ret void
}
declare void @llvm.memcpy.i32(i8* nocapture, i8* nocapture, i32, i32) nounwind