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1; RUN: llc < %s | FileCheck %s
2; rdar://8051990
3
4target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
5target triple = "x86_64-apple-darwin11"
6
7; ISel doesn't yet know how to eliminate this extra zero-extend. But until
8; it knows how to do so safely, it shouldn;t eliminate it.
9; CHECK: movzbl  (%rdi), %eax
10; CHECK: movzwl  %ax, %eax
11
12define i64 @_ZL5matchPKtPKhiR9MatchData(i8* %tmp13) nounwind {
13entry:
14  %tmp14 = load i8* %tmp13, align 1
15  %tmp17 = zext i8 %tmp14 to i16
16  br label %bb341
17
18bb341:
19  %tmp18 = add i16 %tmp17, -1
20  %tmp23 = sext i16 %tmp18 to i64
21  ret i64 %tmp23
22}
23