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Add pattern used to match MipsLo, which is needed when the instruction selector

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tries to match a dead MipsLo node (explanation in the link below).

http://article.gmane.org/gmane.comp.compilers.llvm.devel/42757/match=dagcombiner+dead



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139634 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Akira Hatanaka 2011-09-13 20:13:58 +00:00
parent 8f28aaf72c
commit a4b97f327d
2 changed files with 24 additions and 0 deletions
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5
lib/Target/Mips/MipsInstrInfo.td
View File

@ -734,16 +734,20 @@ def : Pat<(MipsJmpLink (i32 texternalsym:$dst)),
// hi/lo relocs
def : Pat<(MipsHi tglobaladdr:$in), (LUi tglobaladdr:$in)>;
def : Pat<(MipsHi tblockaddress:$in), (LUi tblockaddress:$in)>;
def : Pat<(MipsLo tglobaladdr:$in), (ADDiu ZERO, tglobaladdr:$in)>;
def : Pat<(MipsLo tblockaddress:$in), (ADDiu ZERO, tblockaddress:$in)>;
def : Pat<(add CPURegs:$hi, (MipsLo tglobaladdr:$lo)),
(ADDiu CPURegs:$hi, tglobaladdr:$lo)>;
def : Pat<(add CPURegs:$hi, (MipsLo tblockaddress:$lo)),
(ADDiu CPURegs:$hi, tblockaddress:$lo)>;
def : Pat<(MipsHi tjumptable:$in), (LUi tjumptable:$in)>;
def : Pat<(MipsLo tjumptable:$in), (ADDiu ZERO, tjumptable:$in)>;
def : Pat<(add CPURegs:$hi, (MipsLo tjumptable:$lo)),
(ADDiu CPURegs:$hi, tjumptable:$lo)>;
def : Pat<(MipsHi tconstpool:$in), (LUi tconstpool:$in)>;
def : Pat<(MipsLo tconstpool:$in), (ADDiu ZERO, tconstpool:$in)>;
def : Pat<(add CPURegs:$hi, (MipsLo tconstpool:$lo)),
(ADDiu CPURegs:$hi, tconstpool:$lo)>;
@ -759,6 +763,7 @@ def : Pat<(add CPURegs:$gp, (MipsTlsGd tglobaltlsaddr:$in)),
// tprel hi/lo
def : Pat<(MipsTprelHi tglobaltlsaddr:$in), (LUi tglobaltlsaddr:$in)>;
def : Pat<(MipsTprelLo tglobaltlsaddr:$in), (ADDiu ZERO, tglobaltlsaddr:$in)>;
def : Pat<(add CPURegs:$hi, (MipsTprelLo tglobaltlsaddr:$lo)),
(ADDiu CPURegs:$hi, tglobaltlsaddr:$lo)>;

19
test/CodeGen/Mips/mipslopat.ll Normal file
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@ -0,0 +1,19 @@
; This test does not check the machine code output.
; RUN: llc -march=mips < %s
@stat_vol_ptr_int = internal global i32* null, align 4
@stat_ptr_vol_int = internal global i32* null, align 4
define void @simple_vol_file() nounwind {
entry:
%tmp = volatile load i32** @stat_vol_ptr_int, align 4
%0 = bitcast i32* %tmp to i8*
call void @llvm.prefetch(i8* %0, i32 0, i32 0, i32 1)
%tmp1 = load i32** @stat_ptr_vol_int, align 4
%1 = bitcast i32* %tmp1 to i8*
call void @llvm.prefetch(i8* %1, i32 0, i32 0, i32 1)
ret void
}
declare void @llvm.prefetch(i8* nocapture, i32, i32, i32) nounwind