llvm-project/llvm/test/Transforms/InstCombine/getelementptr_const.ll

16 lines
675 B
LLVM

; Test folding of constantexpr geps into normal geps.
; RUN: llvm-as < %s | opt -instcombine -gcse -instcombine | \
; RUN: llvm-dis | not grep getelementptr
@Array = external global [40 x i32] ; <[40 x i32]*> [#uses=2]
define i32 @test(i64 %X) {
%A = getelementptr i32* getelementptr ([40 x i32]* @Array, i64 0, i64 0), i64 %X ; <i32*> [#uses=1]
%B = getelementptr [40 x i32]* @Array, i64 0, i64 %X ; <i32*> [#uses=1]
%a = ptrtoint i32* %A to i32 ; <i32> [#uses=1]
%b = ptrtoint i32* %B to i32 ; <i32> [#uses=1]
%c = sub i32 %a, %b ; <i32> [#uses=1]
ret i32 %c
}