llvm-project/llvm/test/Transforms/GlobalOpt/malloc-promote-2.ll

25 lines
921 B
LLVM

; RUN: opt < %s -globalopt -globaldce -S | not grep malloc
target datalayout = "E-p:64:64:64-a0:0:8-f32:32:32-f64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-v64:64:64-v128:128:128"
@G = internal global i32* null ; <i32**> [#uses=3]
define void @init() {
%malloccall = tail call i8* @malloc(i64 mul (i64 100, i64 4)) ; <i8*> [#uses=1]
%P = bitcast i8* %malloccall to i32* ; <i32*> [#uses=1]
store i32* %P, i32** @G
%GV = load i32** @G ; <i32*> [#uses=1]
%GVe = getelementptr i32* %GV, i32 40 ; <i32*> [#uses=1]
store i32 20, i32* %GVe
ret void
}
declare noalias i8* @malloc(i64)
define i32 @get() {
%GV = load i32** @G ; <i32*> [#uses=1]
%GVe = getelementptr i32* %GV, i32 40 ; <i32*> [#uses=1]
%V = load i32* %GVe ; <i32> [#uses=1]
ret i32 %V
}