1 ; This test checks to see if scalarrepl also works when a gep with all zeroes is 2 ; used instead of a bitcast to prepare a memmove pointer argument. Previously, 3 ; this would not work when there was a vector involved in the struct, preventing 4 ; scalarrepl from removing the alloca below. 5 6 ; RUN: opt < %s -scalarrepl -S > %t 7 ; RUN: cat %t | not grep alloca 8 target datalayout = "E-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64" 9 10 %struct.two = type <{ < 2 x i8 >, i16 }> 11 12 define void @main(%struct.two* %D, i16 %V) { 13 entry: 14 %S = alloca %struct.two 15 %S.2 = getelementptr %struct.two, %struct.two* %S, i32 0, i32 1 16 store i16 %V, i16* %S.2 17 ; This gep is effectively a bitcast to i8*, but is sometimes generated 18 ; because the type of the first element in %struct.two is i8. 19 %tmpS = getelementptr %struct.two, %struct.two* %S, i32 0, i32 0, i32 0 20 %tmpD = bitcast %struct.two* %D to i8* 21 call void @llvm.memmove.p0i8.p0i8.i32(i8* %tmpD, i8* %tmpS, i32 4, i32 1, i1 false) 22 ret void 23 } 24 25 declare void @llvm.memmove.p0i8.p0i8.i32(i8* nocapture, i8* nocapture, i32, i32, i1) nounwind 26
