Fix in MachineOperand::printIRValueReference().

Handle the case where getCurrentFunction() returns nullptr by passing -1 to
printIRSlotNumber(). This will result in <badref> being printed instead of an
assertion failure.

Review: Francis Visoiu Mistrih
https://reviews.llvm.org/D53333

llvm-svn: 345342

1 files changed, 19 insertions, 0 deletions

diff --git a/llvm/test/CodeGen/SystemZ/isel-debug.ll b/llvm/test/CodeGen/SystemZ/isel-debug.ll
new file mode 100644
index 00000000000..cf5370cbec6
--- /dev/null
+++ b/llvm/test/CodeGen/SystemZ/isel-debug.ll
@@ -0,0 +1,19 @@
+; RUN: llc < %s -mtriple=s390x-linux-gnu -debug-only=systemz-isel -o - 2>&1 | \
+; RUN:   FileCheck %s
+
+; REQUIRES: asserts
+;
+; Check that some debug output is printed without problems.
+; CHECK: SystemZAddressingMode
+; CHECK: Base
+; CHECK: Index
+; CHECK: Disp
+
+define void @fun(i64* %ptr) {
+entry:
+  %0 = bitcast i64* %ptr to i32**
+  %1 = load i32*, i32** %0, align 8
+  %xpv_pv = getelementptr inbounds i32, i32* %1
+  store i32 0, i32* %xpv_pv
+  ret void
+}