--- /dev/null
+# RUN: not llc -march=amdgcn -run-pass=legalizer -o /dev/null %s 2>&1 | FileCheck %s
+
+# CHECK: LLVM ERROR: unable to legalize instruction: %3:_(p0) = G_JUMP_TABLE %jump-table.0 (in function: jt_test)
+
+# FIXME: This could probably be smaller, but the jump table MIR parsing is very crashy.
+
+--- |
+ define i32 @jt_test(i32 %x) {
+ entry:
+ switch i32 %x, label %return [
+ i32 75, label %sw.bb
+ i32 34, label %sw.bb
+ i32 56, label %sw.bb
+ i32 35, label %sw.bb
+ i32 40, label %sw.bb
+ i32 4, label %sw.bb1
+ i32 5, label %sw.bb1
+ i32 6, label %sw.bb1
+ ]
+
+ sw.bb: ; preds = %entry, %entry, %entry, %entry, %entry
+ %add = add nsw i32 %x, 42
+ br label %return
+
+ sw.bb1: ; preds = %entry, %entry, %entry
+ %mul = mul nsw i32 %x, 3
+ br label %return
+
+ return: ; preds = %sw.bb1, %sw.bb, %entry
+ %retval.0 = phi i32 [ %mul, %sw.bb1 ], [ %add, %sw.bb ], [ 0, %entry ]
+ ret i32 %retval.0
+ }
+
+...
+---
+name: jt_test
+tracksRegLiveness: true
+jumpTable:
+ kind: block-address
+ entries:
+ - id: 0
+ blocks: [ '%bb.3', '%bb.3', '%bb.3', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.2', '%bb.2', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.2', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.2', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4',
+ '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.4', '%bb.2' ]
+body: |
+ bb.0.entry:
+ liveins: $sgpr0
+
+ %0:_(s32) = COPY $sgpr0
+ %1:_(s32) = G_CONSTANT i32 0
+ %2:_(s1) = G_ICMP intpred(ugt), %0, %1
+ %3:_(p0) = G_JUMP_TABLE %jump-table.0
+ S_NOP 0, implicit %3
+ G_BRCOND %2, %bb.4
+
+ bb.1.entry:
+ successors: %bb.3(0x2aaaaaab), %bb.4(0x2aaaaaab), %bb.2(0x2aaaaaab)
+
+ G_BR %bb.4
+
+ bb.2.sw.bb:
+ G_BR %bb.4
+
+ bb.3.sw.bb1:
+
+ bb.4.return:
+ S_ENDPGM 0
+
+...