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make GVN try to rename inputs to the resultant replaced values, which 

cleans up the generated code a bit.  This should have the added benefit of
not randomly renaming functions/globals like my previous patch did. :)

llvm-svn: 61023
This commit is contained in:
Chris Lattner 2008-12-15 03:46:38 +00:00
parent ff9f3dba12
commit 69131fd872
9 changed files with 18 additions and 14 deletions
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6
llvm/lib/Transforms/Scalar/GVN.cpp
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@ -1040,6 +1040,9 @@ bool GVN::processNonLocalLoad(LoadInst *LI,
// Perform PHI construction.
Value* v = GetValueForBlock(LI->getParent(), LI, BlockReplValues, true);
LI->replaceAllUsesWith(v);
if (!isa<GlobalValue>(v))
v->takeName(LI);
if (isa<PointerType>(v->getType()))
MD->invalidateCachedPointerInfo(v);
toErase.push_back(LI);
@ -1135,7 +1138,8 @@ bool GVN::processNonLocalLoad(LoadInst *LI,
// Perform PHI construction.
Value* v = GetValueForBlock(LI->getParent(), LI, BlockReplValues, true);
LI->replaceAllUsesWith(v);
v->takeName(LI);
if (!isa<GlobalValue>(v))
v->takeName(LI);
if (isa<PointerType>(v->getType()))
MD->invalidateCachedPointerInfo(v);
toErase.push_back(LI);

4
llvm/test/Transforms/GVN/2007-07-26-InterlockingLoops.ll
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@ -1,5 +1,5 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {tmp17625 =}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {tmp17631 =}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {tmp17625 = phi i32. }
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {tmp17631.* = phi i32. }
@last = external global [65 x i32*] ; <[65 x i32*]*> [#uses=1]

2
llvm/test/Transforms/GVN/2007-07-26-PhiErasure.ll
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@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {tmp298316 =}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {tmp298316 = phi i32 }
%struct..0anon = type { i32 }
%struct.FILE = type { i8*, i32, i32, i16, i16, %struct.__sbuf, i32, i8*, i32 (i8*)*, i32 (i8*, i8*, i32)*, i64 (i8*, i64, i32)*, i32 (i8*, i8*, i32)*, %struct.__sbuf, %struct.__sFILEX*, i32, [3 x i8], [1 x i8], %struct.__sbuf, i32, i64 }

2
llvm/test/Transforms/GVN/2007-07-31-NoDomInherit.ll
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@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep tmp51.rle
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {tmp47 = phi i32 }
%struct.anon = type { i32 (i32, i32, i32)*, i32, i32, [3 x i32], i8*, i8*, i8* }
@debug = external constant i32 ; <i32*> [#uses=0]

8
llvm/test/Transforms/GVN/rle-dominated.ll
View File

@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep DEAD
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep load | count 2
define i32 @main(i32** %p) {
block1:
@ -14,7 +14,7 @@ block3:
br label %block4
block4:
%DEAD = load i32** %p
%c = load i32* %DEAD
ret i32 %c
%c = load i32** %p
%d = load i32* %c
ret i32 %d
}

2
llvm/test/Transforms/GVN/rle-must-alias.ll
View File

@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {DEAD.rle = phi i32}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {DEAD = phi i32 }
; XFAIL: *
; FIXME: GVN should eliminate the fully redundant %9 GEP which

2
llvm/test/Transforms/GVN/rle-nonlocal.ll
View File

@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {DEAD =}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {%DEAD = phi i32. }
define i32 @main(i32** %p) {
block1:

4
llvm/test/Transforms/GVN/rle-phi-translate.ll
View File

@ -1,5 +1,5 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {%cv.rle = phi i32}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {%bv.rle = phi i32}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {%cv = phi i32}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {%bv = phi i32}
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
target triple = "i386-apple-darwin7"

2
llvm/test/Transforms/GVN/rle-semidominated.ll
View File

@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {DEAD =}
; RUN: llvm-as < %s | opt -gvn | llvm-dis | grep {DEAD = phi i32 }
define i32 @main(i32* %p) {
block1: