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fix a crash found by inspection.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@61101 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2008-12-16 21:04:51 +00:00
parent 080efb8cea
commit 542dc1a0de
3 changed files with 30 additions and 9 deletions
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2
lib/Transforms/IPO/GlobalOpt.cpp
View File

@ -1055,7 +1055,7 @@ static bool GlobalLoadUsesSimpleEnoughForHeapSRA(GlobalVariable *GV,
// Otherwise, we don't know what it is. // Otherwise, we don't know what it is.
return false; return false;
} }
return true; continue;
} }
// Otherwise we don't know what this is, not ok. // Otherwise we don't know what this is, not ok.

27
test/Transforms/GlobalOpt/2008-12-16-HeapSRACrash.ll Normal file
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@ -0,0 +1,27 @@
; RUN: llvm-as < %s | opt -globalopt | llvm-dis
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"
%struct.foo = type { i32, i32 }
@X = internal global %struct.foo* null ; <%struct.foo**> [#uses=2]
define void @bar(i32 %Size) nounwind noinline {
entry:
%tmp = malloc [1000000 x %struct.foo] ; <[1000000 x %struct.foo]*> [#uses=1]
%.sub = getelementptr [1000000 x %struct.foo]* %tmp, i32 0, i32 0 ; <%struct.foo*> [#uses=1]
store %struct.foo* %.sub, %struct.foo** @X, align 4
ret void
}
define i32 @baz() nounwind readonly noinline {
bb1.thread:
%tmpLD1 = load %struct.foo** @X, align 4 ; <%struct.foo*> [#uses=3]
store %struct.foo* %tmpLD1, %struct.foo** null
br label %bb1
bb1: ; preds = %bb1, %bb1.thread
%tmp = phi %struct.foo* [ %tmpLD1, %bb1.thread ], [ %tmpLD1, %bb1 ] ; <%struct.foo*> [#uses=0]
br i1 false, label %bb2, label %bb1
bb2: ; preds = %bb1
ret i32 0
}

10
test/Transforms/GlobalOpt/heap-sra-2.ll
View File

@ -6,7 +6,7 @@ target triple = "i386-apple-darwin7"
%struct.foo = type { i32, i32 } %struct.foo = type { i32, i32 }
@X = internal global %struct.foo* null ; <%struct.foo**> [#uses=2] @X = internal global %struct.foo* null ; <%struct.foo**> [#uses=2]
define internal fastcc void @bar(i32 %Size) nounwind noinline { define void @bar(i32 %Size) nounwind noinline {
entry: entry:
%0 = malloc [1000000 x %struct.foo] %0 = malloc [1000000 x %struct.foo]
;%.sub = bitcast [1000000 x %struct.foo]* %0 to %struct.foo* ;%.sub = bitcast [1000000 x %struct.foo]* %0 to %struct.foo*
@ -15,7 +15,7 @@ entry:
ret void ret void
} }
define internal fastcc i32 @baz() nounwind readonly noinline { define i32 @baz() nounwind readonly noinline {
bb1.thread: bb1.thread:
%0 = load %struct.foo** @X, align 4 ; <%struct.foo*> [#uses=1] %0 = load %struct.foo** @X, align 4 ; <%struct.foo*> [#uses=1]
br label %bb1 br label %bb1
@ -34,9 +34,3 @@ bb2: ; preds = %bb1
ret i32 %3 ret i32 %3
} }
define i32 @main(i32 %argc, i8** %argv) nounwind {
entry:
tail call fastcc void @bar(i32 %argc) nounwind noinline
%0 = tail call fastcc i32 @baz() nounwind ; <i32> [#uses=1]
ret i32 %0
}