1; RUN: llc < %s -march=x86-64 -mattr=+sse2 | FileCheck %s 2 3; This test makes sure that the compiler does not crash with an 4; assertion failure when trying to fold a vector shift left 5; by immediate count if the type of the input vector is different 6; to the result type. 7; 8; This happens for example when lowering a shift left of a MVT::v16i8 vector. 9; This is custom lowered into the following sequence: 10; count << 5 11; A = VSHLI(MVT::v8i16, r & (char16)15, 4) 12; B = BITCAST MVT::v16i8, A 13; VSELECT(r, B, count); 14; count += count 15; C = VSHLI(MVT::v8i16, r & (char16)63, 2) 16; D = BITCAST MVT::v16i8, C 17; r = VSELECT(r, C, count); 18; count += count 19; VSELECT(r, r+r, count); 20; count = count << 5; 21; 22; Where 'r' is a vector of type MVT::v16i8, and 23; 'count' is the vector shift count. 24 25define <16 x i8> @do_not_crash(i8*, i32*, i64*, i32, i64, i8) { 26entry: 27 store i8 %5, i8* %0 28 %L5 = load i8, i8* %0 29 %I8 = insertelement <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>, i8 %L5, i32 7 30 %B51 = shl <16 x i8> <i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1, i8 -1>, %I8 31 ret <16 x i8> %B51 32} 33 34; CHECK-LABEL: do_not_crash 35; CHECK: ret 36 37