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objectsize:

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refactor code a bit to enable future changes to support run-time information
add support to compute allocation sizes at run-time if penalty > 1 (e.g., malloc(x), calloc(x, y), and VLAs)

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@156515 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nuno Lopes
2012-05-09 21:30:57 +00:00
parent 9166d23327
commit e3305b1750
2 changed files with 97 additions and 66 deletions
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12
test/Transforms/InstCombine/objsize.ll
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@@ -42,7 +42,7 @@ define i32 @f() nounwind {
define i1 @baz() nounwind {
; CHECK: @baz
; CHECK-NEXT: ret i1 true
; CHECK-NEXT: objectsize
%1 = tail call i32 @llvm.objectsize.i32(i8* getelementptr inbounds ([0 x i8]* @window, i32 0, i32 0), i1 false, i32 0)
%2 = icmp eq i32 %1, -1
ret i1 %2
@@ -168,13 +168,3 @@ define i32 @test8() {
; CHECK-NEXT: ret i32 30
ret i32 %objsize
}
; test for overflow in calloc
define i32 @test9() {
; CHECK: @test9
%alloc = call noalias i8* @calloc(i32 100000000, i32 100000000) nounwind
%gep = getelementptr inbounds i8* %alloc, i32 2
%objsize = call i32 @llvm.objectsize.i32(i8* %gep, i1 true, i32 0) nounwind readonly
; CHECK-NEXT: ret i32 0
ret i32 %objsize
}