llvm-6502/test/CodeGen/X86/mmx-vzmovl-2.ll
Dan Gohman afc36a9520 Previously, RecursivelyDeleteDeadInstructions provided an option
of returning a list of pointers to Values that are deleted. This was
unsafe, because the pointers in the list are, by nature of what
RecursivelyDeleteDeadInstructions does, always dangling. Replace this
with a simple callback mechanism. This may eventually be removed if
all clients can reasonably be expected to use CallbackVH.

Use this to factor out the dead-phi-cycle-elimination code from LSR
utility function, and generalize it to use the
RecursivelyDeleteTriviallyDeadInstructions utility function.

This makes LSR more aggressive about eliminating dead PHI cycles;
adjust tests to either be less trivial or to simply expect fewer
instructions.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@70636 91177308-0d34-0410-b5e6-96231b3b80d8
2009-05-02 18:29:22 +00:00

26 lines
1.2 KiB
LLVM

; RUN: llvm-as < %s | llc -march=x86-64 -mattr=+mmx | grep pxor
; RUN: llvm-as < %s | llc -march=x86-64 -mattr=+mmx | grep punpckldq
%struct.vS1024 = type { [8 x <4 x i32>] }
%struct.vS512 = type { [4 x <4 x i32>] }
declare <1 x i64> @llvm.x86.mmx.psrli.q(<1 x i64>, i32) nounwind readnone
define void @t() nounwind {
entry:
br label %bb554
bb554: ; preds = %bb554, %entry
%sum.0.reg2mem.0 = phi <1 x i64> [ %tmp562, %bb554 ], [ zeroinitializer, %entry ] ; <<1 x i64>> [#uses=1]
%0 = load <1 x i64>* null, align 8 ; <<1 x i64>> [#uses=2]
%1 = bitcast <1 x i64> %0 to <2 x i32> ; <<2 x i32>> [#uses=1]
%tmp555 = and <2 x i32> %1, < i32 -1, i32 0 > ; <<2 x i32>> [#uses=1]
%2 = bitcast <2 x i32> %tmp555 to <1 x i64> ; <<1 x i64>> [#uses=1]
%3 = call <1 x i64> @llvm.x86.mmx.psrli.q(<1 x i64> %0, i32 32) nounwind readnone ; <<1 x i64>> [#uses=1]
store <1 x i64> %sum.0.reg2mem.0, <1 x i64>* null
%tmp558 = add <1 x i64> %sum.0.reg2mem.0, %2 ; <<1 x i64>> [#uses=1]
%4 = call <1 x i64> @llvm.x86.mmx.psrli.q(<1 x i64> %tmp558, i32 32) nounwind readnone ; <<1 x i64>> [#uses=1]
%tmp562 = add <1 x i64> %4, %3 ; <<1 x i64>> [#uses=1]
br label %bb554
}