20 lines · plain
1; RUN: llc < %s -mtriple=mips -mcpu=mips2 | FileCheck %s -check-prefix=ALL2 3; This test triggered a bug in the vector splitting where the type legalizer4; attempted to extract the element with by storing the vector, then reading5; an element back. However, the address calculation was:6; Base + Index * (EltSizeInBits / 8)7; and EltSizeInBits was 1. This caused the index to be forgotten.8define i1 @via_stack_bug(i8 signext %idx) {9 %1 = extractelement <2 x i1> <i1 false, i1 true>, i8 %idx10 ret i1 %111}12 13; ALL-LABEL: via_stack_bug:14; ALL-DAG: addiu [[ONE:\$[0-9]+]], $zero, 115; ALL-DAG: sh [[ONE]], 6($sp)16; ALL-DAG: andi [[MASKED_IDX:\$[0-9]+]], $4, 117; ALL-DAG: addiu [[VPTR:\$[0-9]+]], $sp, 618; ALL-DAG: or [[EPTR:\$[0-9]+]], [[VPTR]], [[MASKED_IDX]]19; ALL: lbu $2, 0([[EPTR]])20