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Add a test case for (store (op (load ..) ..) ..) folding.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@26656 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Evan Cheng 2006-03-09 19:04:30 +00:00
parent f083839425
commit e9eded1c25
2 changed files with 45 additions and 2 deletions
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2
test/CodeGen/X86/store_op_load_fold.ll
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@ -2,8 +2,6 @@
;
; Test the add and load are folded into the store instruction.
target triple = "i686-pc-linux-gnu"
%X = weak global short 0
void %foo() {

45
test/CodeGen/X86/store_op_load_fold2.ll Normal file
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@ -0,0 +1,45 @@
; RUN: llvm-as < %s | llc -march=x86 -x86-asm-syntax=intel | grep 'and DWORD PTR' | wc -l | grep 1
;
; FIXME: The number of (store (and (load ..) ..) ..) really should be 2. But the current hack
; only allow one of the folding to happen.
%struct.Macroblock = type { int, int, int, int, int, [8 x int], %struct.Macroblock*, %struct.Macroblock*, int, [2 x [4 x [4 x [2 x int]]]], [16 x sbyte], [16 x sbyte], int, long, [4 x int], [4 x int], long, int, int, int, int, int, int, int, int, int, int, int, int, int, int, int, short, double, int, int, int, int, int, int, int, int, int }
implementation ; Functions:
internal fastcc int %dct_chroma(int %uv, int %cr_cbp) {
entry:
br bool false, label %bb2611, label %cond_true129
cond_true129: ; preds = %entry
ret int 0
bb2611: ; preds = %entry
br bool false, label %cond_true2732.preheader, label %cond_next2752
cond_true2732.preheader: ; preds = %bb2611
%tmp2666 = getelementptr %struct.Macroblock* null, int 0, uint 13 ; <long*> [#uses=2]
%tmp2674 = cast int 0 to ubyte ; <ubyte> [#uses=1]
br bool false, label %cond_true2732.preheader.split.us, label %cond_true2732.preheader.split
cond_true2732.preheader.split.us: ; preds = %cond_true2732.preheader
br bool false, label %cond_true2732.outer.us.us, label %cond_true2732.outer.us
cond_true2732.outer.us.us: ; preds = %cond_true2732.preheader.split.us
%tmp2667.us.us = load long* %tmp2666 ; <long> [#uses=1]
%tmp2670.us.us = load long* null ; <long> [#uses=1]
%tmp2675.us.us = shl long %tmp2670.us.us, ubyte %tmp2674 ; <long> [#uses=1]
%tmp2675not.us.us = xor long %tmp2675.us.us, -1 ; <long> [#uses=1]
%tmp2676.us.us = and long %tmp2667.us.us, %tmp2675not.us.us ; <long> [#uses=1]
store long %tmp2676.us.us, long* %tmp2666
ret int 0
cond_true2732.outer.us: ; preds = %cond_true2732.preheader.split.us
ret int 0
cond_true2732.preheader.split: ; preds = %cond_true2732.preheader
ret int 0
cond_next2752: ; preds = %bb2611
ret int 0
}