1 files changed, 45 insertions, 0 deletions
diff --git a/test/CodeGen/X86/cmp-fast-isel.ll b/test/CodeGen/X86/cmp-fast-isel.ll
new file mode 100644
index 0000000..39738fa
--- /dev/null
+++ b/test/CodeGen/X86/cmp-fast-isel.ll
@@ -0,0 +1,45 @@
+; RUN: llc -mtriple=x86_64-linux -fast-isel -show-mc-encoding < %s | FileCheck %s
+
+; pr22854
+
+define i32 @f1(i16 %x) {
+; CHECK-LABEL: f1:
+; CHECK: cmpw	$42, %di               # encoding: [0x66,0x83,0xff,0x2a]
+bb0:
+  %cmp = icmp ne i16 %x, 42
+  br i1 %cmp, label %bb3, label %bb7
+
+bb3:
+  ret i32 1
+
+bb7:
+  ret i32 2
+}
+
+define i32 @f2(i32 %x) {
+; CHECK-LABEL: f2:
+; CHECK: cmpl	$42, %edi               # encoding: [0x83,0xff,0x2a]
+bb0:
+  %cmp = icmp ne i32 %x, 42
+  br i1 %cmp, label %bb3, label %bb7
+
+bb3:
+  ret i32 1
+
+bb7:
+  ret i32 2
+}
+
+define i32 @f3(i64 %x) {
+; CHECK-LABEL: f3:
+; CHECK: cmpq	$42, %rdi               # encoding: [0x48,0x83,0xff,0x2a]
+bb0:
+  %cmp = icmp ne i64 %x, 42
+  br i1 %cmp, label %bb3, label %bb7
+
+bb3:
+  ret i32 1
+
+bb7:
+  ret i32 2
+}