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new testcase: sra should be able to eliminate all of these alloca's, despite

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the presense of pointer casts


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24666 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner 2005-12-12 07:18:59 +00:00
parent 0831310441
commit fa8f80ae0a
1 changed files with 54 additions and 0 deletions
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54
test/Transforms/ScalarRepl/AggregatePromote.ll Normal file
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; RUN: llvm-as < %s | opt -scalarrepl | llvm-dis | not grep alloca &&
; RUN: llvm-as < %s | opt -scalarrepl -disable-output
target endian = big
target pointersize = 32
target triple = "powerpc-apple-darwin8.0.0"
long %test1(long %X) {
%A = alloca long
store long %X, long* %A
%B = cast long* %A to int*
%C = cast int* %B to sbyte*
store sbyte 0, sbyte* %C
%Y = load long *%A
ret long %Y
}
sbyte %test2(long %X) {
%X_addr = alloca long ; <long*> [#uses=2]
store long %X, long* %X_addr
%tmp.0 = cast long* %X_addr to int* ; <int*> [#uses=1]
%tmp.1 = getelementptr int* %tmp.0, int 1 ; <int*> [#uses=1]
%tmp.2 = cast int* %tmp.1 to sbyte*
%tmp.3 = getelementptr sbyte* %tmp.2, int 3
%tmp.2 = load sbyte* %tmp.3 ; <int> [#uses=1]
ret sbyte %tmp.2
}
short %crafty(long %X) {
%a = alloca { long }
%tmp.0 = getelementptr { long }* %a, int 0, uint 0 ; <long*> [#uses=1]
store long %X, long* %tmp.0
%tmp.3 = cast { long }* %a to [4 x short]* ; <[4 x short]*> [#uses=2]
%tmp.4 = getelementptr [4 x short]* %tmp.3, int 0, int 3 ; <short*> [#uses=1]
%tmp.5 = load short* %tmp.4 ; <short> [#uses=1]
%tmp.8 = getelementptr [4 x short]* %tmp.3, int 0, int 2 ; <short*> [#uses=1]
%tmp.9 = load short* %tmp.8 ; <short> [#uses=1]
%tmp.10 = or short %tmp.9, %tmp.5 ; <short> [#uses=1]
ret short %tmp.10
}
short %crafty2(long %X) {
%a = alloca long
store long %X, long* %a
%tmp.3 = cast long* %a to [4 x short]* ; <[4 x short]*> [#uses=2]
%tmp.4 = getelementptr [4 x short]* %tmp.3, int 0, int 3 ; <short*> [#uses=1]
%tmp.5 = load short* %tmp.4 ; <short> [#uses=1]
%tmp.8 = getelementptr [4 x short]* %tmp.3, int 0, int 2 ; <short*> [#uses=1]
%tmp.9 = load short* %tmp.8 ; <short> [#uses=1]
%tmp.10 = or short %tmp.9, %tmp.5 ; <short> [#uses=1]
ret short %tmp.10
}