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Update computeArraySize() to use ComputeMultiple() to determine the array size associated with a malloc; also extend PerformHeapAllocSRoA() to check if the optimized malloc's arg had its highest bit set, so that it is safe for ComputeMultiple() to look through sext instructions while determining the optimized malloc's array size

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@86676 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Victor Hernandez
2009-11-10 08:32:25 +00:00
parent 2b6705f5e7
commit 8e345a1c41
4 changed files with 30 additions and 110 deletions
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10
test/Analysis/PointerTracking/sizes.ll
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@@ -31,7 +31,6 @@ entry:
}
declare i32 @bar(i8*)
declare i32 @bar2(i64*)
define i32 @foo1(i32 %n) nounwind {
entry:
@@ -66,11 +65,6 @@ entry:
%call = tail call i8* @malloc(i64 %n) ; <i8*> [#uses=1]
; CHECK: %call =
; CHECK: ==> %n elements, %n bytes allocated
%mallocsize = mul i64 %n, 8 ; <i64> [#uses=1]
%malloccall = tail call i8* @malloc(i64 %mallocsize) ; <i8*> [#uses=1]
%call3 = bitcast i8* %malloccall to i64* ; <i64*> [#uses=1]
; CHECK: %malloccall =
; CHECK: ==> (8 * %n) elements, (8 * %n) bytes allocated
%call2 = tail call i8* @calloc(i64 2, i64 4) nounwind ; <i8*> [#uses=1]
; CHECK: %call2 =
; CHECK: ==> 8 elements, 8 bytes allocated
@@ -78,12 +72,10 @@ entry:
; CHECK: %call4 =
; CHECK: ==> 16 elements, 16 bytes allocated
%call6 = tail call i32 @bar(i8* %call) nounwind ; <i32> [#uses=1]
%call7 = tail call i32 @bar2(i64* %call3) nounwind ; <i32> [#uses=1]
%call8 = tail call i32 @bar(i8* %call2) nounwind ; <i32> [#uses=1]
%call10 = tail call i32 @bar(i8* %call4) nounwind ; <i32> [#uses=1]
%add = add i32 %call8, %call6 ; <i32> [#uses=1]
%add10 = add i32 %add, %call7 ; <i32> [#uses=1]
%add11 = add i32 %add10, %call10 ; <i32> [#uses=1]
%add11 = add i32 %add, %call10 ; <i32> [#uses=1]
ret i32 %add11
}