diff options
Diffstat (limited to 'llvm/test')
| -rw-r--r-- | llvm/test/CodeGen/AArch64/fast-regalloc-empty-bb-with-liveins.mir | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/llvm/test/CodeGen/AArch64/fast-regalloc-empty-bb-with-liveins.mir b/llvm/test/CodeGen/AArch64/fast-regalloc-empty-bb-with-liveins.mir new file mode 100644 index 00000000000..fc19173a176 --- /dev/null +++ b/llvm/test/CodeGen/AArch64/fast-regalloc-empty-bb-with-liveins.mir @@ -0,0 +1,26 @@ +# NOTE: Assertions have been autogenerated by utils/update_mir_test_checks.py +# RUN: llc -mtriple aarch64-apple-ios -run-pass regallocfast -o - %s | FileCheck %s +# This test used to crash the fast register alloc. +# Basically, when a basic block has liveins, the fast regalloc +# was deferencing the begin iterator of this block. However, +# when this block is empty and it will just crashed! +--- +name: crashing +tracksRegLiveness: true +body: | + ; CHECK-LABEL: name: crashing + ; CHECK: bb.0: + ; CHECK: successors: %bb.1(0x80000000) + ; CHECK: liveins: %x0, %x1 + ; CHECK: bb.1: + ; CHECK: renamable %w0 = MOVi32imm -1 + ; CHECK: RET_ReallyLR implicit killed %w0 + bb.1: + liveins: %x0, %x1 + + bb.2: + %0:gpr32 = MOVi32imm -1 + %w0 = COPY %0 + RET_ReallyLR implicit %w0 + +... |
