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something wrong with this opt 

llvm-svn: 44370
This commit is contained in:
Andrew Lenharth 2007-11-27 18:31:30 +00:00
parent a7944d86de
commit b960acebde
2 changed files with 27 additions and 12 deletions
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26
llvm/lib/Target/Alpha/AlphaInstrInfo.td
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@ -1086,16 +1086,18 @@ def : Pat<(mul GPRC:$RA, immRemP2:$imm),
(ADDQr (SLr GPRC:$RA, (nearP2X immRemP2:$imm)), (SLi GPRC:$RA, (nearP2RemX immRemP2:$imm)))>;
//n is below a power of 2
def : Pat<(mul GPRC:$RA, immRem1n:$imm),
(SUBQr (SLr GPRC:$RA, (nearP2X immRem1n:$imm)), GPRC:$RA)>;
def : Pat<(mul GPRC:$RA, immRem2n:$imm),
(SUBQr (SLr GPRC:$RA, (nearP2X immRem2n:$imm)), (ADDQr GPRC:$RA, GPRC:$RA))>;
def : Pat<(mul GPRC:$RA, immRem3n:$imm),
(SUBQr (SLr GPRC:$RA, (nearP2X immRem3n:$imm)), (S4SUBQr GPRC:$RA, GPRC:$RA))>;
def : Pat<(mul GPRC:$RA, immRem4n:$imm),
(SUBQr (SLr GPRC:$RA, (nearP2X immRem4n:$imm)), (SLi GPRC:$RA, 2))>;
def : Pat<(mul GPRC:$RA, immRem5n:$imm),
(SUBQr (SLr GPRC:$RA, (nearP2X immRem5n:$imm)), (S4ADDQr GPRC:$RA, GPRC:$RA))>;
def : Pat<(mul GPRC:$RA, immRemP2n:$imm),
(SUBQr (SLr GPRC:$RA, (nearP2X immRemP2n:$imm)), (SLi GPRC:$RA, (nearP2RemX immRemP2n:$imm)))>;
//FIXME: figure out why something is truncating the imm to 32bits
// this will fix 2007-11-27-mulneg3
//def : Pat<(mul GPRC:$RA, immRem1n:$imm),
// (SUBQr (SLr GPRC:$RA, (nearP2X immRem1n:$imm)), GPRC:$RA)>;
//def : Pat<(mul GPRC:$RA, immRem2n:$imm),
// (SUBQr (SLr GPRC:$RA, (nearP2X immRem2n:$imm)), (ADDQr GPRC:$RA, GPRC:$RA))>;
//def : Pat<(mul GPRC:$RA, immRem3n:$imm),
// (SUBQr (SLr GPRC:$RA, (nearP2X immRem3n:$imm)), (S4SUBQr GPRC:$RA, GPRC:$RA))>;
//def : Pat<(mul GPRC:$RA, immRem4n:$imm),
// (SUBQr (SLr GPRC:$RA, (nearP2X immRem4n:$imm)), (SLi GPRC:$RA, 2))>;
//def : Pat<(mul GPRC:$RA, immRem5n:$imm),
// (SUBQr (SLr GPRC:$RA, (nearP2X immRem5n:$imm)), (S4ADDQr GPRC:$RA, GPRC:$RA))>;
//def : Pat<(mul GPRC:$RA, immRemP2n:$imm),
// (SUBQr (SLr GPRC:$RA, (nearP2X immRemP2n:$imm)), (SLi GPRC:$RA, (nearP2RemX immRemP2n:$imm)))>;
} //Added complexity

13
llvm/test/CodeGen/Alpha/2007-11-27-mulneg3.ll Normal file
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@ -0,0 +1,13 @@
; RUN: llvm-as < %s | llc -march=alpha
;FIXME: this should produce no mul inst. But not crashing will have to do for now
; ModuleID = 'Output/bugpoint-train/bugpoint-reduced-simplified.bc'
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-f128:128:128"
target triple = "alphaev6-unknown-linux-gnu"
define fastcc i32 @getcount(i32 %s) {
cond_next43: ; preds = %bb27
%tmp431 = mul i32 %s, -3
ret i32 %tmp431
}