llvm-6502/test/CodeGen/X86/zext-extract_subreg.ll
Cameron Zwarich 899eaa3569 Roll r127459 back in:
Optimize trivial branches in CodeGenPrepare, which often get created from the
lowering of objectsize intrinsics. Unfortunately, a number of tests were relying
on llc not optimizing trivial branches, so I had to add an option to allow them
to continue to test what they originally tested.

This fixes <rdar://problem/8785296> and <rdar://problem/9112893>.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@127498 91177308-0d34-0410-b5e6-96231b3b80d8
2011-03-11 21:52:04 +00:00

62 lines
2.1 KiB
LLVM

; RUN: llc < %s -mtriple=x86_64-apple-darwin | FileCheck %s
define void @t() nounwind ssp {
; CHECK: t:
entry:
br i1 undef, label %return, label %if.end.i
if.end.i: ; preds = %entry
%tmp7.i = load i32* undef, align 4, !tbaa !0
br i1 undef, label %return, label %if.end
if.end: ; preds = %if.end.i
; CHECK: %if.end
; CHECK: movl (%{{.*}}), [[REG:%[a-z]+]]
; CHECK-NOT: movl [[REG]], [[REG]]
; CHECK-NEXT: testl [[REG]], [[REG]]
; CHECK-NEXT: xorb
%tmp138 = select i1 undef, i32 0, i32 %tmp7.i
%tmp867 = zext i32 %tmp138 to i64
br label %while.cond
while.cond: ; preds = %while.body, %if.end
%tmp869 = sub i64 %tmp867, 0
%scale2.0 = trunc i64 %tmp869 to i32
%cmp149 = icmp eq i32 %scale2.0, 0
br i1 %cmp149, label %while.end, label %land.rhs
land.rhs: ; preds = %while.cond
br i1 undef, label %while.body, label %while.end
while.body: ; preds = %land.rhs
br label %while.cond
while.end: ; preds = %land.rhs, %while.cond
br i1 undef, label %cond.false205, label %cond.true190
cond.true190: ; preds = %while.end
br i1 undef, label %cond.false242, label %cond.true225
cond.false205: ; preds = %while.end
unreachable
cond.true225: ; preds = %cond.true190
br i1 undef, label %cond.false280, label %cond.true271
cond.false242: ; preds = %cond.true190
unreachable
cond.true271: ; preds = %cond.true225
unreachable
cond.false280: ; preds = %cond.true225
unreachable
return: ; preds = %if.end.i, %entry
ret void
}
!0 = metadata !{metadata !"int", metadata !1}
!1 = metadata !{metadata !"omnipotent char", metadata !2}
!2 = metadata !{metadata !"Simple C/C++ TBAA", null}