llvm-6502/test/CodeGen/X86/machine-cp.ll
Evan Cheng 01b623c8c2 Fix machine-cp by having it to check sub-register indicies. e.g.
ecx = mov eax
al  = mov ch
The second copy is not a nop because the sub-indices of ecx,ch is not the
same of that of eax/al.

Re-enabled machine-cp.
PR11940


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@151002 91177308-0d34-0410-b5e6-96231b3b80d8
2012-02-20 23:28:17 +00:00

37 lines
1.2 KiB
LLVM

; RUN: llc -mtriple=x86_64-apple-macosx -mcpu=nocona < %s | FileCheck %s
; After tail duplication, two copies in an early exit BB can be cancelled out.
; rdar://10640363
define i32 @t1(i32 %a, i32 %b) nounwind {
entry:
; CHECK: t1:
; CHECK: jne
%cmp1 = icmp eq i32 %b, 0
br i1 %cmp1, label %while.end, label %while.body
; CHECK: BB
; CHECK-NOT: mov
; CHECK: ret
while.body: ; preds = %entry, %while.body
%a.addr.03 = phi i32 [ %b.addr.02, %while.body ], [ %a, %entry ]
%b.addr.02 = phi i32 [ %rem, %while.body ], [ %b, %entry ]
%rem = srem i32 %a.addr.03, %b.addr.02
%cmp = icmp eq i32 %rem, 0
br i1 %cmp, label %while.end, label %while.body
while.end: ; preds = %while.body, %entry
%a.addr.0.lcssa = phi i32 [ %a, %entry ], [ %b.addr.02, %while.body ]
ret i32 %a.addr.0.lcssa
}
; Two movdqa (from phi-elimination) in the entry BB cancels out.
; rdar://10428165
define <8 x i16> @t2(<8 x i16> %T0, <8 x i16> %T1) nounwind readnone {
entry:
; CHECK: t2:
; CHECK-NOT: movdqa
%tmp8 = shufflevector <8 x i16> %T0, <8 x i16> %T1, <8 x i32> < i32 undef, i32 undef, i32 7, i32 2, i32 8, i32 undef, i32 undef , i32 undef >
ret <8 x i16> %tmp8
}