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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
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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]])