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Add missing test for GEP + bitcast transformation

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@188529 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2013-08-16 02:59:17 +00:00
parent 4e31acb558
commit beccdd3ede
1 changed files with 24 additions and 0 deletions
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24
test/Transforms/InstCombine/getelementptr.ll
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@ -573,4 +573,28 @@ define i1 @pr16483([1 x i8]* %a, [1 x i8]* %b) {
; CHECK-NEXT: icmp ult [1 x i8]* %a, %b ; CHECK-NEXT: icmp ult [1 x i8]* %a, %b
} }
; The element size of the array matches the element size of the pointer
define i64 @test_gep_bitcast_array_same_size_element([100 x double]* %arr, i64 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_same_size_element(
; CHECK: getelementptr [100 x double]* %arr, i64 0, i64 %V
; CHECK: bitcast
%cast = bitcast [100 x double]* %arr to i64*
%V = mul i64 %N, 8
%t = getelementptr i64* %cast, i64 %V
%x = load i64* %t
ret i64 %x
}
; The element size of the array is different the element size of the pointer
define i8 @test_gep_bitcast_array_different_size_element([100 x double]* %arr, i64 %N) {
; CHECK-LABEL: @test_gep_bitcast_array_different_size_element(
; CHECK: getelementptr [100 x double]* %arr, i64 0, i64 %N
; CHECK: bitcast
%cast = bitcast [100 x double]* %arr to i8*
%V = mul i64 %N, 8
%t = getelementptr i8* %cast, i64 %V
%x = load i8* %t
ret i8 %x
}
; CHECK: attributes [[NUW]] = { nounwind } ; CHECK: attributes [[NUW]] = { nounwind }