2011-04-15-RegisterCmpPeephole.ll
976 Bytes
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; RUN: llc < %s -mtriple=thumbv7-apple-darwin10 | FileCheck %s
; CHECK: _f
; CHECK: adds
; CHECK-NOT: cmp
; CHECK: bleq _h
define i32 @f(i32 %a, i32 %b) nounwind ssp {
entry:
%add = add nsw i32 %b, %a
%cmp = icmp eq i32 %add, 0
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
tail call void (...) @h(i32 %a, i32 %b) nounwind
br label %if.end
if.end: ; preds = %if.then, %entry
ret i32 %add
}
; CHECK: _g
; CHECK: orrs
; CHECK-NOT: cmp
; CHECK: bleq _h
define i32 @g(i32 %a, i32 %b) nounwind ssp {
entry:
%add = or i32 %b, %a
%cmp = icmp eq i32 %add, 0
br i1 %cmp, label %if.then, label %if.end
if.then: ; preds = %entry
tail call void (...) @h(i32 %a, i32 %b) nounwind
br label %if.end
if.end: ; preds = %if.then, %entry
ret i32 %add
}
declare void @h(...)