diff options
Diffstat (limited to 'test/CodeGen/Mips/llvm-ir/extractelement.ll')
-rw-r--r-- | test/CodeGen/Mips/llvm-ir/extractelement.ll | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/test/CodeGen/Mips/llvm-ir/extractelement.ll b/test/CodeGen/Mips/llvm-ir/extractelement.ll new file mode 100644 index 0000000000000..1e1b02df99a27 --- /dev/null +++ b/test/CodeGen/Mips/llvm-ir/extractelement.ll @@ -0,0 +1,19 @@ +; RUN: llc < %s -march=mips -mcpu=mips2 | FileCheck %s -check-prefix=ALL + +; This test triggered a bug in the vector splitting where the type legalizer +; attempted to extract the element with by storing the vector, then reading +; an element back. However, the address calculation was: +; Base + Index * (EltSizeInBits / 8) +; and EltSizeInBits was 1. This caused the index to be forgotten. +define i1 @via_stack_bug(i8 signext %idx) { + %1 = extractelement <2 x i1> <i1 false, i1 true>, i8 %idx + ret i1 %1 +} + +; ALL-LABEL: via_stack_bug: +; ALL-DAG: addiu [[ONE:\$[0-9]+]], $zero, 1 +; ALL-DAG: sb [[ONE]], 7($sp) +; ALL-DAG: sb $zero, 6($sp) +; ALL-DAG: addiu [[VPTR:\$[0-9]+]], $sp, 6 +; ALL-DAG: addu [[EPTR:\$[0-9]+]], $4, [[VPTR]] +; ALL: lbu $2, 0([[EPTR]]) |