1; RUN: llc < %s -march=x86 | grep testl 2 3; It's tempting to eliminate the testl instruction here and just use the 4; EFLAGS value from the incl, however it can't be known whether the add 5; will overflow, and if it does the incl would set OF, and the 6; subsequent setg would return true. 7 8target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128" 9target triple = "i386-apple-darwin9.6" 10 11define i32 @f(i32 %j) nounwind readnone { 12entry: 13 %0 = add i32 %j, 1 ; <i32> [#uses=1] 14 %1 = icmp sgt i32 %0, 0 ; <i1> [#uses=1] 15 %2 = zext i1 %1 to i32 ; <i32> [#uses=1] 16 ret i32 %2 17} 18