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Fix a bug introduced in my last commit.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40542 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Owen Anderson
2007-07-26 18:57:04 +00:00
parent 45537917ee
commit a377a24771
3 changed files with 24 additions and 2 deletions
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8
lib/Analysis/MemoryDependenceAnalysis.cpp
View File

@@ -117,12 +117,18 @@ bool MemoryDependenceAnalysis::nonLocalHelper(Instruction* query,
visited.insert(block); visited.insert(block);
bool inserted = false; bool inserted = false;
bool predOnStack = false;
for (pred_iterator PI = pred_begin(block), PE = pred_end(block); for (pred_iterator PI = pred_begin(block), PE = pred_end(block);
PI != PE; ++PI) PI != PE; ++PI)
if (!visited.count(*PI)) if (!visited.count(*PI))
inserted |= nonLocalHelper(query, *PI, resp, visited); inserted |= nonLocalHelper(query, *PI, resp, visited);
else
predOnStack = true;
visited.erase(block); visited.erase(block);
if (!inserted && !predOnStack)
resp.insert(std::make_pair(block, None));
return inserted; return inserted;
} }

2
test/Transforms/GVN/2007-07-25-InfiniteLoop.ll
View File

@@ -1,4 +1,4 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis ; RUN: llvm-as < %s | opt -gvn | llvm-dis | not grep {tmp10 =}
%struct.INT2 = type { i32, i32 } %struct.INT2 = type { i32, i32 }
@blkshifts = external global %struct.INT2* ; <%struct.INT2**> [#uses=2] @blkshifts = external global %struct.INT2* ; <%struct.INT2**> [#uses=2]

16
test/Transforms/GVN/2007-07-26-NonRedundant.ll Normal file
View File

@@ -0,0 +1,16 @@
; RUN: llvm-as < %s | opt -gvn | llvm-dis
@bsLive = external global i32 ; <i32*> [#uses=2]
define i32 @bsR(i32 %n) {
entry:
br i1 false, label %cond_next, label %bb19
cond_next: ; preds = %entry
store i32 0, i32* @bsLive, align 4
br label %bb19
bb19: ; preds = %cond_next, %entry
%tmp29 = load i32* @bsLive, align 4 ; <i32> [#uses=0]
ret i32 0
}