1 ; RUN: llc < %s | FileCheck %s 2 ; rdar://8051990 3 4 target 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" 5 target 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 12 define i64 @_ZL5matchPKtPKhiR9MatchData(i8* %tmp13) nounwind { 13 entry: 14 %tmp14 = load i8, i8* %tmp13, align 1 15 %tmp17 = zext i8 %tmp14 to i16 16 br label %bb341 17 18 bb341: 19 %tmp18 = add i16 %tmp17, -1 20 %tmp23 = sext i16 %tmp18 to i64 21 ret i64 %tmp23 22 } 23
